sfrench/cifs-2.6.git
2 years agoMerge tag 'wireless-drivers-next-for-davem-2018-02-08' of git://git.kernel.org/pub...
David S. Miller [Thu, 8 Feb 2018 20:32:25 +0000 (15:32 -0500)]
Merge tag 'wireless-drivers-next-for-davem-2018-02-08' of git://git./linux/kernel/git/kvalo/wireless-drivers-next

Kalle Valo says:

====================
wireless-drivers-next patches for 4.16

The most important here is the ssb fix, it has been reported by the
users frequently and the fix just missed the final v4.15. Also
numerous other fixes, mt76 had multiple problems with aggregation and
a long standing unaligned access bug in rtlwifi is finally fixed.

Major changes:

ath10k

* correct firmware RAM dump length for QCA6174/QCA9377

* add new QCA988X device id

* fix a kernel panic during pci probe

* revert a recent commit which broke ath10k firmware metadata parsing

ath9k

* fix a noise floor regression introduced during the merge window

* add new device id

rtlwifi

* fix unaligned access seen on ARM architecture

mt76

* various aggregation fixes which fix connection stalls

ssb

* fix b43 and b44 on non-MIPS which broke in v4.15-rc9
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agotipc: fix skb truesize/datasize ratio control
Hoang Le [Thu, 8 Feb 2018 16:16:25 +0000 (17:16 +0100)]
tipc: fix skb truesize/datasize ratio control

In commit d618d09a68e4 ("tipc: enforce valid ratio between skb truesize
and contents") we introduced a test for ensuring that the condition
truesize/datasize <= 4 is true for a received buffer. Unfortunately this
test has two problems.

- Because of the integer arithmetics the test
  if (skb->truesize / buf_roundup_len(skb) > 4) will miss all
  ratios [4 < ratio < 5], which was not the intention.
- The buffer returned by skb_copy() inherits skb->truesize of the
  original buffer, which doesn't help the situation at all.

In this commit, we change the ratio condition and replace skb_copy()
with a call to skb_copy_expand() to finally get this right.

Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet/sched: cls_u32: fix cls_u32 on filter replace
Ivan Vecera [Thu, 8 Feb 2018 15:10:39 +0000 (16:10 +0100)]
net/sched: cls_u32: fix cls_u32 on filter replace

The following sequence is currently broken:

 # tc qdisc add dev foo ingress
 # tc filter replace dev foo protocol all ingress \
   u32 match u8 0 0 action mirred egress mirror dev bar1
 # tc filter replace dev foo protocol all ingress \
   handle 800::800 pref 49152 \
   u32 match u8 0 0 action mirred egress mirror dev bar2
 Error: cls_u32: Key node flags do not match passed flags.
 We have an error talking to the kernel, -1

The error comes from u32_change() when comparing new and
existing flags. The existing ones always contains one of
TCA_CLS_FLAGS_{,NOT}_IN_HW flag depending on offloading state.
These flags cannot be passed from userspace so the condition
(n->flags != flags) in u32_change() always fails.

Fix the condition so the flags TCA_CLS_FLAGS_NOT_IN_HW and
TCA_CLS_FLAGS_IN_HW are not taken into account.

Fixes: 24d3dc6d27ea ("net/sched: cls_u32: Reflect HW offload status")
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agompls, nospec: Sanitize array index in mpls_label_ok()
Dan Williams [Thu, 8 Feb 2018 06:34:24 +0000 (22:34 -0800)]
mpls, nospec: Sanitize array index in mpls_label_ok()

mpls_label_ok() validates that the 'platform_label' array index from a
userspace netlink message payload is valid. Under speculation the
mpls_label_ok() result may not resolve in the CPU pipeline until after
the index is used to access an array element. Sanitize the index to zero
to prevent userspace-controlled arbitrary out-of-bounds speculation, a
precursor for a speculative execution side channel vulnerability.

Cc: <stable@vger.kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agords: tcp: use rds_destroy_pending() to synchronize netns/module teardown and rds...
Sowmini Varadhan [Sat, 3 Feb 2018 12:26:51 +0000 (04:26 -0800)]
rds: tcp: use rds_destroy_pending() to synchronize netns/module teardown and rds connection/workq management

An rds_connection can get added during netns deletion between lines 528
and 529 of

  506 static void rds_tcp_kill_sock(struct net *net)
  :
  /* code to pull out all the rds_connections that should be destroyed */
  :
  528         spin_unlock_irq(&rds_tcp_conn_lock);
  529         list_for_each_entry_safe(tc, _tc, &tmp_list, t_tcp_node)
  530                 rds_conn_destroy(tc->t_cpath->cp_conn);

Such an rds_connection would miss out the rds_conn_destroy()
loop (that cancels all pending work) and (if it was scheduled
after netns deletion) could trigger the use-after-free.

A similar race-window exists for the module unload path
in rds_tcp_exit -> rds_tcp_destroy_conns

Concurrency with netns deletion (rds_tcp_kill_sock()) must be handled
by checking check_net() before enqueuing new work or adding new
connections.

Concurrency with module-unload is handled by maintaining a module
specific flag that is set at the start of the module exit function,
and must be checked before enqueuing new work or adding new connections.

This commit refactors existing RDS_DESTROY_PENDING checks added by
commit 3db6e0d172c9 ("rds: use RCU to synchronize work-enqueue with
connection teardown") and consolidates all the concurrency checks
listed above into the function rds_destroy_pending().

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: Whitelist the skbuff_head_cache "cb" field
Kees Cook [Thu, 8 Feb 2018 01:44:38 +0000 (17:44 -0800)]
net: Whitelist the skbuff_head_cache "cb" field

Most callers of put_cmsg() use a "sizeof(foo)" for the length argument.
Within put_cmsg(), a copy_to_user() call is made with a dynamic size, as a
result of the cmsg header calculations. This means that hardened usercopy
will examine the copy, even though it was technically a fixed size and
should be implicitly whitelisted. All the put_cmsg() calls being built
from values in skbuff_head_cache are coming out of the protocol-defined
"cb" field, so whitelist this field entirely instead of creating per-use
bounce buffers, for which there are concerns about performance.

Original report was:

Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLAB object 'skbuff_head_cache' (offset 64, size 16)!
WARNING: CPU: 0 PID: 3663 at mm/usercopy.c:81 usercopy_warn+0xdb/0x100 mm/usercopy.c:76
...
 __check_heap_object+0x89/0xc0 mm/slab.c:4426
 check_heap_object mm/usercopy.c:236 [inline]
 __check_object_size+0x272/0x530 mm/usercopy.c:259
 check_object_size include/linux/thread_info.h:112 [inline]
 check_copy_size include/linux/thread_info.h:143 [inline]
 copy_to_user include/linux/uaccess.h:154 [inline]
 put_cmsg+0x233/0x3f0 net/core/scm.c:242
 sock_recv_errqueue+0x200/0x3e0 net/core/sock.c:2913
 packet_recvmsg+0xb2e/0x17a0 net/packet/af_packet.c:3296
 sock_recvmsg_nosec net/socket.c:803 [inline]
 sock_recvmsg+0xc9/0x110 net/socket.c:810
 ___sys_recvmsg+0x2a4/0x640 net/socket.c:2179
 __sys_recvmmsg+0x2a9/0xaf0 net/socket.c:2287
 SYSC_recvmmsg net/socket.c:2368 [inline]
 SyS_recvmmsg+0xc4/0x160 net/socket.c:2352
 entry_SYSCALL_64_fastpath+0x29/0xa0

Reported-by: syzbot+e2d6cfb305e9f3911dea@syzkaller.appspotmail.com
Fixes: 6d07d1cd300f ("usercopy: Restrict non-usercopy caches to size 0")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: Extra '_get' in declaration of arch_get_platform_mac_address
Mathieu Malaterre [Wed, 7 Feb 2018 19:35:00 +0000 (20:35 +0100)]
net: Extra '_get' in declaration of arch_get_platform_mac_address

In commit c7f5d105495a ("net: Add eth_platform_get_mac_address() helper."),
two declarations were added:

  int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr);
  unsigned char *arch_get_platform_get_mac_address(void);

An extra '_get' was introduced in arch_get_platform_get_mac_address, remove
it. Fix compile warning using W=1:

  CC      net/ethernet/eth.o
net/ethernet/eth.c:523:24: warning: no previous prototype for ‘arch_get_platform_mac_address’ [-Wmissing-prototypes]
 unsigned char * __weak arch_get_platform_mac_address(void)
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  AR      net/ethernet/built-in.o

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoibmvnic: queue reset when CRQ gets closed during reset
Nathan Fontenot [Wed, 7 Feb 2018 19:00:24 +0000 (13:00 -0600)]
ibmvnic: queue reset when CRQ gets closed during reset

While handling a driver reset we get a H_CLOSED return trying
to send a CRQ event. When this occurs we need to queue up another
reset attempt. Without doing this we see instances where the driver
is left in a closed state because the reset failed and there is no
further attempts to reset the driver.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoatm: he: use 64-bit arithmetic instead of 32-bit
Gustavo A. R. Silva [Wed, 7 Feb 2018 16:17:29 +0000 (10:17 -0600)]
atm: he: use 64-bit arithmetic instead of 32-bit

Add suffix ULL to constants 272, 204, 136 and 68 in order to give the
compiler complete information about the proper arithmetic to use.
Notice that these constants are used in contexts that expect
expressions of type unsigned long long (64 bits, unsigned).

The following expressions are currently being evaluated using 32-bit
arithmetic:

272 * mult
204 * mult
136 * mult
68 * mult

Addresses-Coverity-ID: 201058
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agortnetlink: require unique netns identifier
Christian Brauner [Wed, 7 Feb 2018 12:53:20 +0000 (13:53 +0100)]
rtnetlink: require unique netns identifier

Since we've added support for IFLA_IF_NETNSID for RTM_{DEL,GET,SET,NEW}LINK
it is possible for userspace to send us requests with three different
properties to identify a target network namespace. This affects at least
RTM_{NEW,SET}LINK. Each of them could potentially refer to a different
network namespace which is confusing. For legacy reasons the kernel will
pick the IFLA_NET_NS_PID property first and then look for the
IFLA_NET_NS_FD property but there is no reason to extend this type of
behavior to network namespace ids. The regression potential is quite
minimal since the rtnetlink requests in question either won't allow
IFLA_IF_NETNSID requests before 4.16 is out (RTM_{NEW,SET}LINK) or don't
support IFLA_NET_NS_{PID,FD} (RTM_{DEL,GET}LINK) in the first place.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agotuntap: add missing xdp flush
Jason Wang [Wed, 7 Feb 2018 09:14:46 +0000 (17:14 +0800)]
tuntap: add missing xdp flush

When using devmap to redirect packets between interfaces,
xdp_do_flush() is usually a must to flush any batched
packets. Unfortunately this is missed in current tuntap
implementation.

Unlike most hardware driver which did XDP inside NAPI loop and call
xdp_do_flush() at then end of each round of poll. TAP did it in the
context of process e.g tun_get_user(). So fix this by count the
pending redirected packets and flush when it exceeds NAPI_POLL_WEIGHT
or MSG_MORE was cleared by sendmsg() caller.

With this fix, xdp_redirect_map works again between two TAPs.

Fixes: 761876c857cb ("tap: XDP support")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonetlink: ensure to loop over all netns in genlmsg_multicast_allns()
Nicolas Dichtel [Tue, 6 Feb 2018 13:48:32 +0000 (14:48 +0100)]
netlink: ensure to loop over all netns in genlmsg_multicast_allns()

Nowadays, nlmsg_multicast() returns only 0 or -ESRCH but this was not the
case when commit 134e63756d5f was pushed.
However, there was no reason to stop the loop if a netns does not have
listeners.
Returns -ESRCH only if there was no listeners in all netns.

To avoid having the same problem in the future, I didn't take the
assumption that nlmsg_multicast() returns only 0 or -ESRCH.

Fixes: 134e63756d5f ("genetlink: make netns aware")
CC: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agorxrpc: Don't put crypto buffers on the stack
David Howells [Thu, 8 Feb 2018 15:59:07 +0000 (15:59 +0000)]
rxrpc: Don't put crypto buffers on the stack

Don't put buffers of data to be handed to crypto on the stack as this may
cause an assertion failure in the kernel (see below).  Fix this by using an
kmalloc'd buffer instead.

kernel BUG at ./include/linux/scatterlist.h:147!
...
RIP: 0010:rxkad_encrypt_response.isra.6+0x191/0x1b0 [rxrpc]
RSP: 0018:ffffbe2fc06cfca8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff989277d59900 RCX: 0000000000000028
RDX: 0000259dc06cfd88 RSI: 0000000000000025 RDI: ffffbe30406cfd88
RBP: ffffbe2fc06cfd60 R08: ffffbe2fc06cfd08 R09: ffffbe2fc06cfd08
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff7c5f80d9f95
R13: ffffbe2fc06cfd88 R14: ffff98927a3f7aa0 R15: ffffbe2fc06cfd08
FS:  0000000000000000(0000) GS:ffff98927fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b1ff28f0f8 CR3: 000000001b412003 CR4: 00000000003606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rxkad_respond_to_challenge+0x297/0x330 [rxrpc]
 rxrpc_process_connection+0xd1/0x690 [rxrpc]
 ? process_one_work+0x1c3/0x680
 ? __lock_is_held+0x59/0xa0
 process_one_work+0x249/0x680
 worker_thread+0x3a/0x390
 ? process_one_work+0x680/0x680
 kthread+0x121/0x140
 ? kthread_create_worker_on_cpu+0x70/0x70
 ret_from_fork+0x3a/0x50

Reported-by: Jonathan Billings <jsbillings@jsbillings.org>
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Jonathan Billings <jsbillings@jsbillings.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge ath-current from git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
Kalle Valo [Thu, 8 Feb 2018 17:28:49 +0000 (19:28 +0200)]
Merge ath-current from git://git./linux/kernel/git/kvalo/ath.git

ath.git fixes for 4.16. Major changes:

ath10k

* correct firmware RAM dump length for QCA6174/QCA9377

* add new QCA988X device id

* fix a kernel panic during pci probe

* revert a recent commit which broke ath10k firmware metadata parsing

ath9k

* fix a noise floor regression introduced during the merge window

* add new device id

2 years agoMerge branch 'nfp-fix-disabling-TC-offloads-in-flower-max-TSO-segs-and-module-version'
David S. Miller [Thu, 8 Feb 2018 15:01:28 +0000 (10:01 -0500)]
Merge branch 'nfp-fix-disabling-TC-offloads-in-flower-max-TSO-segs-and-module-version'

Jakub Kicinski says:

====================
nfp: fix disabling TC offloads in flower, max TSO segs and module version

This set corrects the way nfp deals with the NETIF_F_HW_TC flag.
It has slipped the review that flower offload does not currently
refuse disabling this flag when filter offload is active.

nfp's flower offload does not actually keep track of how many filters
for each port are offloaded.  The accounting of the number of filters
is added to the nfp core structures, and BPF moved to use these
structures as well.

If users are allowed to disable TC offloads while filters are active,
not only is it incorrect behaviour, but actually the NFP will never
be told to remove the flows, leading to use-after-free when stats
arrive.

Fourth patch makes sure we declare the max number of TSO segments.
FW should drop longer packets cleanly (otherwise this would be a
security problem for untrusted VFs) but dropping longer TSO frames
is not nice and driver should prevent them from being generated.

Last small addition populates MODULE_VERSION with kernel version.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonfp: populate MODULE_VERSION
Jakub Kicinski [Thu, 8 Feb 2018 04:55:26 +0000 (20:55 -0800)]
nfp: populate MODULE_VERSION

DKMS and similar out-of-tree module replacement services use
module version to make sure the out-of-tree software is not
older than the module shipped with the kernel.  We use the
kernel version in ethtool -i output, put it into MODULE_VERSION
as well.

Reported-by: Jan Gutter <jan.gutter@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonfp: limit the number of TSO segments
Jakub Kicinski [Thu, 8 Feb 2018 04:55:25 +0000 (20:55 -0800)]
nfp: limit the number of TSO segments

Most FWs limit the number of TSO segments a frame can produce
to 64.  This is for fairness and efficiency (of FW datapath)
reasons.  If a frame with larger number of segments is submitted
the FW will drop it.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonfp: forbid disabling hw-tc-offload on representors while offload active
Jakub Kicinski [Thu, 8 Feb 2018 04:55:24 +0000 (20:55 -0800)]
nfp: forbid disabling hw-tc-offload on representors while offload active

All netdevs which can accept TC offloads must implement
.ndo_set_features().  nfp_reprs currently do not do that, which
means hw-tc-offload can be turned on and off even when offloads
are active.

Whether the offloads are active is really a question to nfp_ports,
so remove the per-app tc_busy callback indirection thing, and
simply count the number of offloaded items in nfp_port structure.

Fixes: 8a2768732a4d ("nfp: provide infrastructure for offloading flower based TC filters")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonfp: don't advertise hw-tc-offload on non-port netdevs
Jakub Kicinski [Thu, 8 Feb 2018 04:55:23 +0000 (20:55 -0800)]
nfp: don't advertise hw-tc-offload on non-port netdevs

nfp_port is a structure which represents an ASIC port, both
PCIe vNIC (on a PF or a VF) or the external MAC port.  vNIC
netdev (struct nfp_net) and pure representor netdev (struct
nfp_repr) both have a pointer to this structure.  nfp_reprs
always have a port associated.  nfp_nets, however, only represent
a device port in legacy mode, where they are considered the
MAC port. In switchdev mode they are just the CPU's side of
the PCIe link.

By definition TC offloads only apply to device ports.  Don't
set the flag on vNICs without a port (i.e. in switchdev mode).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonfp: bpf: require ETH table
Jakub Kicinski [Thu, 8 Feb 2018 04:55:22 +0000 (20:55 -0800)]
nfp: bpf: require ETH table

Upcoming changes will require all netdevs supporting TC offloads
to have a full struct nfp_port.  Require those for BPF offload.
The operation without management FW reporting information about
Ethernet ports is something we only support for very old and very
basic NIC firmwares anyway.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoRevert "ath10k: add sanity check to ie_len before parsing fw/board ie"
Ryan Hsu [Wed, 7 Feb 2018 13:51:23 +0000 (15:51 +0200)]
Revert "ath10k: add sanity check to ie_len before parsing fw/board ie"

This reverts commit 9ed4f91628737c820af6a1815b65bc06bd31518f.

The commit introduced a regression that over read the ie with
the padding.

- the expected IE information

ath10k_pci 0000:03:00.0: found firmware features ie (1 B)
ath10k_pci 0000:03:00.0: Enabling feature bit: 6
ath10k_pci 0000:03:00.0: Enabling feature bit: 7
ath10k_pci 0000:03:00.0: features
ath10k_pci 0000:03:00.0: 00000000: c0 00 00 00 00 00 00 00

- the wrong IE with padding is read (0x77)

ath10k_pci 0000:03:00.0: found firmware features ie (4 B)
ath10k_pci 0000:03:00.0: Enabling feature bit: 6
ath10k_pci 0000:03:00.0: Enabling feature bit: 7
ath10k_pci 0000:03:00.0: Enabling feature bit: 8
ath10k_pci 0000:03:00.0: Enabling feature bit: 9
ath10k_pci 0000:03:00.0: Enabling feature bit: 10
ath10k_pci 0000:03:00.0: Enabling feature bit: 12
ath10k_pci 0000:03:00.0: Enabling feature bit: 13
ath10k_pci 0000:03:00.0: Enabling feature bit: 14
ath10k_pci 0000:03:00.0: Enabling feature bit: 16
ath10k_pci 0000:03:00.0: Enabling feature bit: 17
ath10k_pci 0000:03:00.0: Enabling feature bit: 18
ath10k_pci 0000:03:00.0: features
ath10k_pci 0000:03:00.0: 00000000: c0 77 07 00 00 00 00 00

Tested-by: Mike Lothian <mike@fireburn.co.uk>
Signed-off-by: Ryan Hsu <ryanhsu@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agotcp: tracepoint: only call trace_tcp_send_reset with full socket
Song Liu [Wed, 7 Feb 2018 04:50:23 +0000 (20:50 -0800)]
tcp: tracepoint: only call trace_tcp_send_reset with full socket

tracepoint tcp_send_reset requires a full socket to work. However, it
may be called when in TCP_TIME_WAIT:

        case TCP_TW_RST:
                tcp_v6_send_reset(sk, skb);
                inet_twsk_deschedule_put(inet_twsk(sk));
                goto discard_it;

To avoid this problem, this patch checks the socket with sk_fullsock()
before calling trace_tcp_send_reset().

Fixes: c24b14c46bb8 ("tcp: add tracepoint trace_tcp_send_reset")
Signed-off-by: Song Liu <songliubraving@fb.com>
Reviewed-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agosch_netem: Bug fixing in calculating Netem interval
Md. Islam [Wed, 7 Feb 2018 04:14:18 +0000 (23:14 -0500)]
sch_netem: Bug fixing in calculating Netem interval

In Kernel 4.15.0+, Netem does not work properly.

Netem setup:

tc qdisc add dev h1-eth0 root handle 1: netem delay 10ms 2ms

Result:

PING 172.16.101.2 (172.16.101.2) 56(84) bytes of data.
64 bytes from 172.16.101.2: icmp_seq=1 ttl=64 time=22.8 ms
64 bytes from 172.16.101.2: icmp_seq=2 ttl=64 time=10.9 ms
64 bytes from 172.16.101.2: icmp_seq=3 ttl=64 time=10.9 ms
64 bytes from 172.16.101.2: icmp_seq=5 ttl=64 time=11.4 ms
64 bytes from 172.16.101.2: icmp_seq=6 ttl=64 time=11.8 ms
64 bytes from 172.16.101.2: icmp_seq=4 ttl=64 time=4303 ms
64 bytes from 172.16.101.2: icmp_seq=10 ttl=64 time=11.2 ms
64 bytes from 172.16.101.2: icmp_seq=11 ttl=64 time=10.3 ms
64 bytes from 172.16.101.2: icmp_seq=7 ttl=64 time=4304 ms
64 bytes from 172.16.101.2: icmp_seq=8 ttl=64 time=4303 ms

Patch:

(rnd % (2 * sigma)) - sigma was overflowing s32. After applying the
patch, I found following output which is desirable.

PING 172.16.101.2 (172.16.101.2) 56(84) bytes of data.
64 bytes from 172.16.101.2: icmp_seq=1 ttl=64 time=21.1 ms
64 bytes from 172.16.101.2: icmp_seq=2 ttl=64 time=8.46 ms
64 bytes from 172.16.101.2: icmp_seq=3 ttl=64 time=9.00 ms
64 bytes from 172.16.101.2: icmp_seq=4 ttl=64 time=11.8 ms
64 bytes from 172.16.101.2: icmp_seq=5 ttl=64 time=8.36 ms
64 bytes from 172.16.101.2: icmp_seq=6 ttl=64 time=11.8 ms
64 bytes from 172.16.101.2: icmp_seq=7 ttl=64 time=8.11 ms
64 bytes from 172.16.101.2: icmp_seq=8 ttl=64 time=10.0 ms
64 bytes from 172.16.101.2: icmp_seq=9 ttl=64 time=11.3 ms
64 bytes from 172.16.101.2: icmp_seq=10 ttl=64 time=11.5 ms
64 bytes from 172.16.101.2: icmp_seq=11 ttl=64 time=10.2 ms

Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ethernet: ti: cpsw: fix net watchdog timeout
Grygorii Strashko [Wed, 7 Feb 2018 01:17:06 +0000 (19:17 -0600)]
net: ethernet: ti: cpsw: fix net watchdog timeout

It was discovered that simple program which indefinitely sends 200b UDP
packets and runs on TI AM574x SoC (SMP) under RT Kernel triggers network
watchdog timeout in TI CPSW driver (<6 hours run). The network watchdog
timeout is triggered due to race between cpsw_ndo_start_xmit() and
cpsw_tx_handler() [NAPI]

cpsw_ndo_start_xmit()
if (unlikely(!cpdma_check_free_tx_desc(txch))) {
txq = netdev_get_tx_queue(ndev, q_idx);
netif_tx_stop_queue(txq);

^^ as per [1] barier has to be used after set_bit() otherwise new value
might not be visible to other cpus
}

cpsw_tx_handler()
if (unlikely(netif_tx_queue_stopped(txq)))
netif_tx_wake_queue(txq);

and when it happens ndev TX queue became disabled forever while driver's HW
TX queue is empty.

Fix this, by adding smp_mb__after_atomic() after netif_tx_stop_queue()
calls and double check for free TX descriptors after stopping ndev TX queue
- if there are free TX descriptors wake up ndev TX queue.

[1] https://www.kernel.org/doc/html/latest/core-api/atomic_ops.html
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoibmvnic: Ensure that buffers are NULL after free
Thomas Falcon [Tue, 6 Feb 2018 23:25:23 +0000 (17:25 -0600)]
ibmvnic: Ensure that buffers are NULL after free

This change will guard against a double free in the case that the
buffers were previously freed at some other time, such as during
a device reset. It resolves a kernel oops that occurred when changing
the VNIC device's MTU.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoibmvnic: Fix rx queue cleanup for non-fatal resets
John Allen [Tue, 6 Feb 2018 22:21:49 +0000 (16:21 -0600)]
ibmvnic: Fix rx queue cleanup for non-fatal resets

At some point, a check was added to exit the polling routine during resets.
This makes sense for most reset conditions, but for a non-fatal error, we
expect the polling routine to continue running to properly clean up the rx
queues. This patch checks if we are performing a non-fatal reset and if we
are, continues normal polling operation.

Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoi40e: Fix the number of queues available to be mapped for use
Amritha Nambiar [Tue, 6 Feb 2018 21:15:20 +0000 (13:15 -0800)]
i40e: Fix the number of queues available to be mapped for use

Fix the number of queues per enabled TC and report available queues
to the kernel without having to limit them to the max RSS limit so
they are available to be mapped for XPS. This allows a queue per
processing thread available for handling traffic for the given
traffic class.

Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet/ipv6: onlink nexthop checks should default to main table
David Ahern [Tue, 6 Feb 2018 21:17:06 +0000 (13:17 -0800)]
net/ipv6: onlink nexthop checks should default to main table

Because of differences in how ipv4 and ipv6 handle fib lookups,
verification of nexthops with onlink flag need to default to the main
table rather than the local table used by IPv4. As it stands an
address within a connected route on device 1 can be used with
onlink on device 2. Updating the table properly rejects the route
due to the egress device mismatch.

Update the extack message as well to show it could be a device
mismatch for the nexthop spec.

Fixes: fc1e64e1092f ("net/ipv6: Add support for onlink flag")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet/ipv6: Handle reject routes with onlink flag
David Ahern [Tue, 6 Feb 2018 20:14:12 +0000 (12:14 -0800)]
net/ipv6: Handle reject routes with onlink flag

Verification of nexthops with onlink flag need to handle unreachable
routes. The lookup is only intended to validate the gateway address
is not a local address and if the gateway resolves the egress device
must match the given device. Hence, hitting any default reject route
is ok.

Fixes: fc1e64e1092f ("net/ipv6: Add support for onlink flag")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agosun: Add SPDX license tags to Sun network drivers
Shannon Nelson [Tue, 6 Feb 2018 19:34:23 +0000 (11:34 -0800)]
sun: Add SPDX license tags to Sun network drivers

Add the appropriate SPDX license tags to the Sun network drivers
as outlined in Documentation/process/license-rules.rst.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agorxrpc: Fix received abort handling
David Howells [Tue, 6 Feb 2018 16:44:12 +0000 (16:44 +0000)]
rxrpc: Fix received abort handling

AF_RXRPC is incorrectly sending back to the server any abort it receives
for a client connection.  This is due to the final-ACK offload to the
connection event processor patch.  The abort code is copied into the
last-call information on the connection channel and then the event
processor is set.

Instead, the following should be done:

 (1) In the case of a final-ACK for a successful call, the ACK should be
     scheduled as before.

 (2) In the case of a locally generated ABORT, the ABORT details should be
     cached for sending in response to further packets related to that
     call and no further action scheduled at call disconnect time.

 (3) In the case of an ACK received from the peer, the call should be
     considered dead, no ABORT should be transmitted at this time.  In
     response to further non-ABORT packets from the peer relating to this
     call, an RX_USER_ABORT ABORT should be transmitted.

 (4) In the case of a call killed due to network error, an RX_USER_ABORT
     ABORT should be cached for transmission in response to further
     packets, but no ABORT should be sent at this time.

Fixes: 3136ef49a14c ("rxrpc: Delay terminal ACK transmission on a client call")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agocxgb4: Fix error handling path in 'init_one()'
Christophe JAILLET [Tue, 6 Feb 2018 20:17:17 +0000 (21:17 +0100)]
cxgb4: Fix error handling path in 'init_one()'

Commit baf5086840ab1 ("cxgb4: restructure VF mgmt code") has reordered
some code but an error handling label has not been updated accordingly.
So fix it and free 'adapter' if 't4_wait_dev_ready()' fails.

Fixes: baf5086840ab1 ("cxgb4: restructure VF mgmt code")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Wed, 7 Feb 2018 18:55:20 +0000 (13:55 -0500)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for you net tree, they
are:

1) Restore __GFP_NORETRY in xt_table allocations to mitigate effects of
   large memory allocation requests, from Michal Hocko.

2) Release IPv6 fragment queue in case of error in fragmentation header,
   this is a follow up to amend patch 83f1999caeb1, from Subash Abhinov
   Kasiviswanathan.

3) Flowtable infrastructure depends on NETFILTER_INGRESS as it registers
   a hook for each flowtable, reported by John Crispin.

4) Missing initialization of info->priv in xt_cgroup version 1, from
   Cong Wang.

5) Give a chance to garbage collector to run after scheduling flowtable
   cleanup.

6) Releasing flowtable content on nft_flow_offload module removal is
   not required at all, there is not dependencies between this module
   and flowtables, remove it.

7) Fix missing xt_rateest_mutex grabbing for hash insertions, also from
   Cong Wang.

8) Move nf_flow_table_cleanup() routine to flowtable core, this patch is
   a dependency for the next patch in this list.

9) Flowtable resources are not properly released on removal from the
   control plane. Fix this resource leak by scheduling removal of all
   entries and explicit call to the garbage collector.

10) nf_ct_nat_offset() declaration is dead code, this function prototype
    is not used anywhere, remove it. From Taehee Yoo.

11) Fix another flowtable resource leak on entry insertion failures,
    this patch also fixes a possible use-after-free. Patch from Felix
    Fietkau.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoath9k_htc: add Altai WA1011N-GU
Oleksij Rempel [Tue, 30 Jan 2018 12:06:11 +0000 (14:06 +0200)]
ath9k_htc: add Altai WA1011N-GU

as reported in:
https://github.com/qca/open-ath9k-htc-firmware/pull/71#issuecomment-361100070

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agoath10k: fix kernel panic issue during pci probe
Yu Wang [Tue, 30 Jan 2018 12:06:08 +0000 (14:06 +0200)]
ath10k: fix kernel panic issue during pci probe

If device gone during chip reset, ar->normal_mode_fw.board is not
initialized, but ath10k_debug_print_hwfw_info() will try to access its
member, which will cause 'kernel NULL pointer' issue. This was found
using a faulty device (pci link went down sometimes) in a random
insmod/rmmod/other-op test.
To fix it, check ar->normal_mode_fw.board before accessing the member.

pci 0000:02:00.0: BAR 0: assigned [mem 0xf7400000-0xf75fffff 64bit]
ath10k_pci 0000:02:00.0: enabling device (0000 -> 0002)
ath10k_pci 0000:02:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
ath10k_pci 0000:02:00.0: failed to read device register, device is gone
ath10k_pci 0000:02:00.0: failed to wait for target init: -5
ath10k_pci 0000:02:00.0: failed to warm reset: -5
ath10k_pci 0000:02:00.0: firmware crashed during chip reset
ath10k_pci 0000:02:00.0: firmware crashed! (uuid 5d018951-b8e1-404a-8fde-923078b4423a)
ath10k_pci 0000:02:00.0: (null) target 0x00000000 chip_id 0x00340aff sub 0000:0000
ath10k_pci 0000:02:00.0: kconfig debug 1 debugfs 1 tracing 1 dfs 1 testmode 1
ath10k_pci 0000:02:00.0: firmware ver  api 0 features  crc32 00000000
...
BUG: unable to handle kernel NULL pointer dereference at 00000004
...
Call Trace:
 [<fb4e7882>] ath10k_print_driver_info+0x12/0x20 [ath10k_core]
 [<fb62b7dd>] ath10k_pci_fw_crashed_dump+0x6d/0x4d0 [ath10k_pci]
 [<fb629f07>] ? ath10k_pci_sleep.part.19+0x57/0xc0 [ath10k_pci]
 [<fb62c8ee>] ath10k_pci_hif_power_up+0x14e/0x1b0 [ath10k_pci]
 [<c10477fb>] ? do_page_fault+0xb/0x10
 [<fb4eb934>] ath10k_core_register_work+0x24/0x840 [ath10k_core]
 [<c18a00d8>] ? netlbl_unlhsh_remove+0x178/0x410
 [<c10477f0>] ? __do_page_fault+0x480/0x480
 [<c1068e44>] process_one_work+0x114/0x3e0
 [<c1069d07>] worker_thread+0x37/0x4a0
 [<c106e294>] kthread+0xa4/0xc0
 [<c1069cd0>] ? create_worker+0x180/0x180
 [<c106e1f0>] ? kthread_park+0x50/0x50
 [<c18ab4f7>] ret_from_fork+0x1b/0x28
 Code: 78 80 b8 50 09 00 00 00 75 5d 8d 75 94 c7 44 24 08 aa d7 52 fb c7 44 24 04 64 00 00 00
 89 34 24 e8 82 52 e2 c5 8b 83 dc 08 00 00 <8b> 50 04 8b 08 31 c0 e8 20 57 e3 c5 89 44 24 10 8b 83 58 09 00
 EIP: [<fb4e7754>]-
 ath10k_debug_print_board_info+0x34/0xb0 [ath10k_core]
 SS:ESP 0068:f4921d90
 CR2: 0000000000000004

Signed-off-by: Yu Wang <yyuwang@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agoath9k: Fix get channel default noise floor
Wojciech Dubowik [Tue, 30 Jan 2018 12:06:07 +0000 (14:06 +0200)]
ath9k: Fix get channel default noise floor

Commit 8da58553cc63 ("ath9k: Use calibrated noise floor value
when available") introduced regression in ath9k_hw_getchan_noise
where per chain nominal noise floor has been taken instead default
for channel.
Revert to original default channel noise floor.

Fixes: 8da58553cc63 ("ath9k: Use calibrated noise floor value when available")
Reported-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agoath10k: add support for Ubiquiti rebranded QCA988X v2
Tobias Schramm [Tue, 30 Jan 2018 12:06:05 +0000 (14:06 +0200)]
ath10k: add support for Ubiquiti rebranded QCA988X v2

Some modern Ubiquiti devices contain a rebranded QCA988X rev2 with
a custom Ubiquiti vendor and device id. This patch adds support for
those devices, treating them as a QCA988X v2.

Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
[kvalo@codeaurora.org: rebase, add missing fields in hw_params, fix a long line in pci.c:61]
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agoPCI: Add Ubiquiti Networks vendor ID
Tobias Schramm [Tue, 30 Jan 2018 12:06:02 +0000 (14:06 +0200)]
PCI: Add Ubiquiti Networks vendor ID

Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agoath10k: correct the length of DRAM dump for QCA6174 hw3.x/QCA9377 hw1.1
Yu Wang [Tue, 30 Jan 2018 12:06:01 +0000 (14:06 +0200)]
ath10k: correct the length of DRAM dump for QCA6174 hw3.x/QCA9377 hw1.1

The length of DRAM dump for QCA6174 hw3.0/hw3.2 and QCA9377 hw1.1
are less than the actual value, some coredump contents are missed.
To fix it, change the length from 0x90000 to 0xa8000.

Fixes: 703f261dd77f ("ath10k: add memory dump support for QCA6174/QCA9377")
Signed-off-by: Yu Wang <yyuwang@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agortlwifi: rtl8821ae: Fix connection lost problem correctly
Larry Finger [Mon, 5 Feb 2018 18:38:11 +0000 (12:38 -0600)]
rtlwifi: rtl8821ae: Fix connection lost problem correctly

There has been a coding error in rtl8821ae since it was first introduced,
namely that an 8-bit register was read using a 16-bit read in
_rtl8821ae_dbi_read(). This error was fixed with commit 40b368af4b75
("rtlwifi: Fix alignment issues"); however, this change led to
instability in the connection. To restore stability, this change
was reverted in commit b8b8b16352cd ("rtlwifi: rtl8821ae: Fix connection
lost problem").

Unfortunately, the unaligned access causes machine checks in ARM
architecture, and we were finally forced to find the actual cause of the
problem on x86 platforms. Following a suggestion from Pkshih
<pkshih@realtek.com>, it was found that increasing the ASPM L1
latency from 0 to 7 fixed the instability. This parameter was varied to
see if a smaller value would work; however, it appears that 7 is the
safest value. A new symbol is defined for this quantity, thus it can be
easily changed if necessary.

Fixes: b8b8b16352cd ("rtlwifi: rtl8821ae: Fix connection lost problem")
Cc: Stable <stable@vger.kernel.org> # 4.14+
Fix-suggested-by: Pkshih <pkshih@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: James Cameron <quozl@laptop.org> # x86_64 OLPC NL3
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2 years agonetfilter: nf_flow_offload: fix use-after-free and a resource leak
Felix Fietkau [Wed, 7 Feb 2018 08:49:02 +0000 (09:49 +0100)]
netfilter: nf_flow_offload: fix use-after-free and a resource leak

flow_offload_del frees the flow, so all associated resource must be
freed before.

Since the ct entry in struct flow_offload_entry was allocated by
flow_offload_alloc, it should be freed by flow_offload_free to take care
of the error handling path when flow_offload_add fails.

While at it, make flow_offload_del static, since it should never be
called directly, only from the gc step

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2 years agonetfilter: remove useless prototype
Taehee Yoo [Wed, 7 Feb 2018 02:50:41 +0000 (11:50 +0900)]
netfilter: remove useless prototype

prototype nf_ct_nat_offset is not used anymore.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
2 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Wed, 7 Feb 2018 06:15:42 +0000 (22:15 -0800)]
Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - kasan updates

 - procfs

 - lib/bitmap updates

 - other lib/ updates

 - checkpatch tweaks

 - rapidio

 - ubsan

 - pipe fixes and cleanups

 - lots of other misc bits

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits)
  Documentation/sysctl/user.txt: fix typo
  MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
  MAINTAINERS: update various PALM patterns
  MAINTAINERS: update "ARM/OXNAS platform support" patterns
  MAINTAINERS: update Cortina/Gemini patterns
  MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
  MAINTAINERS: remove ANDROID ION pattern
  mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
  mm: docs: fix parameter names mismatch
  mm: docs: fixup punctuation
  pipe: read buffer limits atomically
  pipe: simplify round_pipe_size()
  pipe: reject F_SETPIPE_SZ with size over UINT_MAX
  pipe: fix off-by-one error when checking buffer limits
  pipe: actually allow root to exceed the pipe buffer limits
  pipe, sysctl: remove pipe_proc_fn()
  pipe, sysctl: drop 'min' parameter from pipe-max-size converter
  kasan: rework Kconfig settings
  crash_dump: is_kdump_kernel can be boolean
  kernel/mutex: mutex_is_locked can be boolean
  ...

2 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 7 Feb 2018 03:57:31 +0000 (19:57 -0800)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler updates from Ingo Molnar:

 - membarrier updates (Mathieu Desnoyers)

 - SMP balancing optimizations (Mel Gorman)

 - stats update optimizations (Peter Zijlstra)

 - RT scheduler race fixes (Steven Rostedt)

 - misc fixes and updates

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Use a recently used CPU as an idle candidate and the basis for SIS
  sched/fair: Do not migrate if the prev_cpu is idle
  sched/fair: Restructure wake_affine*() to return a CPU id
  sched/fair: Remove unnecessary parameters from wake_affine_idle()
  sched/rt: Make update_curr_rt() more accurate
  sched/rt: Up the root domain ref count when passing it around via IPIs
  sched/rt: Use container_of() to get root domain in rto_push_irq_work_func()
  sched/core: Optimize update_stats_*()
  sched/core: Optimize ttwu_stat()
  membarrier/selftest: Test private expedited sync core command
  membarrier/arm64: Provide core serializing command
  membarrier/x86: Provide core serializing command
  membarrier: Provide core serializing command, *_SYNC_CORE
  lockin/x86: Implement sync_core_before_usermode()
  locking: Introduce sync_core_before_usermode()
  membarrier/selftest: Test global expedited command
  membarrier: Provide GLOBAL_EXPEDITED command
  membarrier: Document scheduler barrier requirements
  powerpc, membarrier: Skip memory barrier in switch_mm()
  membarrier/selftest: Test private expedited command

2 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 7 Feb 2018 03:56:00 +0000 (19:56 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Tooling fixes, plus add missing interval sampling to certain x86 PEBS
  events"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf tools: Add trace/beauty/generated/ into .gitignore
  perf trace: Fix call-graph output
  x86/events/intel/ds: Add PERF_SAMPLE_PERIOD into PEBS_FREERUNNING_FLAGS
  perf record: Fix period option handling
  perf evsel: Fix period/freq terms setup
  tools headers: Synchoronize x86 features UAPI headers
  tools headers: Synchronize uapi/linux/sched.h
  tools headers: Sync {tools/,}arch/powerpc/include/uapi/asm/kvm.h
  tooling headers: Synchronize updated s390 kvm UAPI headers
  tools headers: Synchronize sound/asound.h

2 years agoMerge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 7 Feb 2018 03:28:19 +0000 (19:28 -0800)]
Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking fixlets from Ingo Molnar:
 "An endianness fix and a jump labels branch hint update"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/qrwlock: include asm/byteorder.h as needed
  jump_label: Add branch hints to static_branch_{un,}likely()

2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Wed, 7 Feb 2018 03:00:42 +0000 (19:00 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix error path in netdevsim, from Jakub Kicinski.

 2) Default values listed in tcp_wmem and tcp_rmem documentation were
    inaccurate, from Tonghao Zhang.

 3) Fix route leaks in SCTP, both for ipv4 and ipv6. From Alexey Kodanev
    and Tommi Rantala.

 4) Fix "MASK < Y" meant to be "MASK << Y" in xgbe driver, from Wolfram
    Sang.

 5) Use after free in u32_destroy_key(), from Paolo Abeni.

 6) Fix two TX issues in be2net driver, from Suredh Reddy.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (25 commits)
  be2net: Handle transmit completion errors in Lancer
  be2net: Fix HW stall issue in Lancer
  RDS: IB: Fix null pointer issue
  nfp: fix kdoc warnings on nested structures
  sample/bpf: fix erspan metadata
  net: erspan: fix erspan config overwrite
  net: erspan: fix metadata extraction
  cls_u32: fix use after free in u32_destroy_key()
  net: amd-xgbe: fix comparison to bitshift when dealing with a mask
  net: phy: Handle not having GPIO enabled in the kernel
  ibmvnic: fix empty firmware version and errors cleanup
  sctp: fix dst refcnt leak in sctp_v4_get_dst
  sctp: fix dst refcnt leak in sctp_v6_get_dst()
  dwc-xlgmac: remove Jie Deng as co-maintainer
  doc: Change the min default value of tcp_wmem/tcp_rmem.
  samples/bpf: use bpf_set_link_xdp_fd
  libbpf: add missing SPDX-License-Identifier
  libbpf: add error reporting in XDP
  libbpf: add function to setup XDP
  tools: add netlink.h and if_link.h in tools uapi
  ...

2 years agoDocumentation/sysctl/user.txt: fix typo
Kangmin Park [Tue, 6 Feb 2018 23:42:44 +0000 (15:42 -0800)]
Documentation/sysctl/user.txt: fix typo

Fix 'documetation' to 'documentation'

Link: http://lkml.kernel.org/r/CAKW4uUxRPZz59aWAX8ytaCB5=Qh6d_CvAnO7rYq-6NRAnQJbDA@mail.gmail.com
Signed-off-by: Kangmin Park <l4stpr0gr4m@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Kosina <trivial@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
Joe Perches [Tue, 6 Feb 2018 23:42:41 +0000 (15:42 -0800)]
MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns

Commit 321737416c72d ("tty: serial: msm: Move header file into driver")
removed the .h file, update the patterns.

Link: http://lkml.kernel.org/r/2b7478bc4c35ab3ac6b06b4edd3b645a8c34a4a2.1517147485.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Andy Gross <andy.gross@linaro.org>
Cc: David Brown <david.brown@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: update various PALM patterns
Joe Perches [Tue, 6 Feb 2018 23:42:37 +0000 (15:42 -0800)]
MAINTAINERS: update various PALM patterns

Commit 4c25c5d2985c ("ARM: pxa: make more mach/*.h files local") moved
the files around, update the patterns.

Link: http://lkml.kernel.org/r/a291f6f61e378a1f35e266fe4c5f646b9feeaa6a.1517147485.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tomas Cech <sleep_walker@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: update "ARM/OXNAS platform support" patterns
Joe Perches [Tue, 6 Feb 2018 23:42:33 +0000 (15:42 -0800)]
MAINTAINERS: update "ARM/OXNAS platform support" patterns

Commit 9e6c62b05c1b ("ARM: dts: rename oxnas dts files") renamed the
files, update the patterns.

[akpm@linux-foundation.org: crunch into a single globbed term, per Arnd]
Link: http://lkml.kernel.org/r/b39d779e143b3c0a4e7dff827346e509447e3e8e.1517147485.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Daniel Golle <daniel@makrotopia.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: update Cortina/Gemini patterns
Joe Perches [Tue, 6 Feb 2018 23:42:30 +0000 (15:42 -0800)]
MAINTAINERS: update Cortina/Gemini patterns

Commit 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit
ethernet") added invalid patterns.  Fix it.

Link: http://lkml.kernel.org/r/65b104609e0071d0fbe0dcce3a8e6138a4cf8c25.1517147485.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
Joe Perches [Tue, 6 Feb 2018 23:42:26 +0000 (15:42 -0800)]
MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern

Commit 34d2f4d3a4d6 ("ARM: Use generic clkdev.h header") removed the
file, remove the pattern.

Link: http://lkml.kernel.org/r/41bfff9449a5894b94f583983b6c6cb46f4cd821.1517147485.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: remove ANDROID ION pattern
Joe Perches [Tue, 6 Feb 2018 23:42:23 +0000 (15:42 -0800)]
MAINTAINERS: remove ANDROID ION pattern

The file drivers/staging/android/uapi/ion_test.h was removed by commit
9828282e33a0 ("staging: android: ion: Remove old platform support")

Remove the pattern.

Link: http://lkml.kernel.org/r/182debec22002c9a1de44e79a7441288942b205c.1517147485.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
Mike Rapoport [Tue, 6 Feb 2018 23:42:19 +0000 (15:42 -0800)]
mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors

Link: http://lkml.kernel.org/r/1516700871-22279-4-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm: docs: fix parameter names mismatch
Mike Rapoport [Tue, 6 Feb 2018 23:42:16 +0000 (15:42 -0800)]
mm: docs: fix parameter names mismatch

There are several places where parameter descriptions do no match the
actual code.  Fix it.

Link: http://lkml.kernel.org/r/1516700871-22279-3-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm: docs: fixup punctuation
Mike Rapoport [Tue, 6 Feb 2018 23:42:13 +0000 (15:42 -0800)]
mm: docs: fixup punctuation

so that kernel-doc will properly recognize the parameter and function
descriptions.

Link: http://lkml.kernel.org/r/1516700871-22279-2-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopipe: read buffer limits atomically
Eric Biggers [Tue, 6 Feb 2018 23:42:08 +0000 (15:42 -0800)]
pipe: read buffer limits atomically

The pipe buffer limits are accessed without any locking, and may be
changed at any time by the sysctl handlers.  In theory this could cause
problems for expressions like the following:

    pipe_user_pages_hard && user_bufs > pipe_user_pages_hard

...  since the assembly code might reference the 'pipe_user_pages_hard'
memory location multiple times, and if the admin removes the limit by
setting it to 0, there is a very brief window where processes could
incorrectly observe the limit to be exceeded.

Fix this by loading the limits with READ_ONCE() prior to use.

Link: http://lkml.kernel.org/r/20180111052902.14409-8-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopipe: simplify round_pipe_size()
Eric Biggers [Tue, 6 Feb 2018 23:42:05 +0000 (15:42 -0800)]
pipe: simplify round_pipe_size()

round_pipe_size() calculates the number of pages the requested size
corresponds to, then rounds the page count up to the next power of 2.

However, it also rounds everything < PAGE_SIZE up to PAGE_SIZE.
Therefore, there's no need to actually translate the size into a page
count; we just need to round the size up to the next power of 2.

We do need to verify the size isn't greater than (1 << 31), since on
32-bit systems roundup_pow_of_two() would be undefined in that case.  But
that can just be combined with the UINT_MAX check which we need anyway
now.

Finally, update pipe_set_size() to not redundantly check the return value
of round_pipe_size() for the "invalid size" case twice.

Link: http://lkml.kernel.org/r/20180111052902.14409-7-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopipe: reject F_SETPIPE_SZ with size over UINT_MAX
Eric Biggers [Tue, 6 Feb 2018 23:42:00 +0000 (15:42 -0800)]
pipe: reject F_SETPIPE_SZ with size over UINT_MAX

A pipe's size is represented as an 'unsigned int'.  As expected, writing a
value greater than UINT_MAX to /proc/sys/fs/pipe-max-size fails with
EINVAL.  However, the F_SETPIPE_SZ fcntl silently truncates such values to
32 bits, rather than failing with EINVAL as expected.  (It *does* fail
with EINVAL for values above (1 << 31) but <= UINT_MAX.)

Fix this by moving the check against UINT_MAX into round_pipe_size() which
is called in both cases.

Link: http://lkml.kernel.org/r/20180111052902.14409-6-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopipe: fix off-by-one error when checking buffer limits
Eric Biggers [Tue, 6 Feb 2018 23:41:56 +0000 (15:41 -0800)]
pipe: fix off-by-one error when checking buffer limits

With pipe-user-pages-hard set to 'N', users were actually only allowed up
to 'N - 1' buffers; and likewise for pipe-user-pages-soft.

Fix this to allow up to 'N' buffers, as would be expected.

Link: http://lkml.kernel.org/r/20180111052902.14409-5-ebiggers3@gmail.com
Fixes: b0b91d18e2e9 ("pipe: fix limit checking in pipe_set_size()")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Willy Tarreau <w@1wt.eu>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopipe: actually allow root to exceed the pipe buffer limits
Eric Biggers [Tue, 6 Feb 2018 23:41:53 +0000 (15:41 -0800)]
pipe: actually allow root to exceed the pipe buffer limits

pipe-user-pages-hard and pipe-user-pages-soft are only supposed to apply
to unprivileged users, as documented in both Documentation/sysctl/fs.txt
and the pipe(7) man page.

However, the capabilities are actually only checked when increasing a
pipe's size using F_SETPIPE_SZ, not when creating a new pipe.  Therefore,
if pipe-user-pages-hard has been set, the root user can run into it and be
unable to create pipes.  Similarly, if pipe-user-pages-soft has been set,
the root user can run into it and have their pipes limited to 1 page each.

Fix this by allowing the privileged override in both cases.

Link: http://lkml.kernel.org/r/20180111052902.14409-4-ebiggers3@gmail.com
Fixes: 759c01142a5d ("pipe: limit the per-user amount of pages allocated in pipes")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopipe, sysctl: remove pipe_proc_fn()
Eric Biggers [Tue, 6 Feb 2018 23:41:49 +0000 (15:41 -0800)]
pipe, sysctl: remove pipe_proc_fn()

pipe_proc_fn() is no longer needed, as it only calls through to
proc_dopipe_max_size().  Just put proc_dopipe_max_size() in the ctl_table
entry directly, and remove the unneeded EXPORT_SYMBOL() and the ENOSYS
stub for it.

(The reason the ENOSYS stub isn't needed is that the pipe-max-size
ctl_table entry is located directly in 'kern_table' rather than being
registered separately.  Therefore, the entry is already only defined when
the kernel is built with sysctl support.)

Link: http://lkml.kernel.org/r/20180111052902.14409-3-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopipe, sysctl: drop 'min' parameter from pipe-max-size converter
Eric Biggers [Tue, 6 Feb 2018 23:41:45 +0000 (15:41 -0800)]
pipe, sysctl: drop 'min' parameter from pipe-max-size converter

Patch series "pipe: buffer limits fixes and cleanups", v2.

This series simplifies the sysctl handler for pipe-max-size and fixes
another set of bugs related to the pipe buffer limits:

- The root user wasn't allowed to exceed the limits when creating new
  pipes.

- There was an off-by-one error when checking the limits, so a limit of
  N was actually treated as N - 1.

- F_SETPIPE_SZ accepted values over UINT_MAX.

- Reading the pipe buffer limits could be racy.

This patch (of 7):

Before validating the given value against pipe_min_size,
do_proc_dopipe_max_size_conv() calls round_pipe_size(), which rounds the
value up to pipe_min_size.  Therefore, the second check against
pipe_min_size is redundant.  Remove it.

Link: http://lkml.kernel.org/r/20180111052902.14409-2-ebiggers3@gmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokasan: rework Kconfig settings
Arnd Bergmann [Tue, 6 Feb 2018 23:41:41 +0000 (15:41 -0800)]
kasan: rework Kconfig settings

We get a lot of very large stack frames using gcc-7.0.1 with the default
-fsanitize-address-use-after-scope --param asan-stack=1 options, which can
easily cause an overflow of the kernel stack, e.g.

  drivers/gpu/drm/i915/gvt/handlers.c:2434:1: warning: the frame size of 46176 bytes is larger than 3072 bytes
  drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5650:1: warning: the frame size of 23632 bytes is larger than 3072 bytes
  lib/atomic64_test.c:250:1: warning: the frame size of 11200 bytes is larger than 3072 bytes
  drivers/gpu/drm/i915/gvt/handlers.c:2621:1: warning: the frame size of 9208 bytes is larger than 3072 bytes
  drivers/media/dvb-frontends/stv090x.c:3431:1: warning: the frame size of 6816 bytes is larger than 3072 bytes
  fs/fscache/stats.c:287:1: warning: the frame size of 6536 bytes is larger than 3072 bytes

To reduce this risk, -fsanitize-address-use-after-scope is now split out
into a separate CONFIG_KASAN_EXTRA Kconfig option, leading to stack
frames that are smaller than 2 kilobytes most of the time on x86_64.  An
earlier version of this patch also prevented combining KASAN_EXTRA with
KASAN_INLINE, but that is no longer necessary with gcc-7.0.1.

All patches to get the frame size below 2048 bytes with CONFIG_KASAN=y
and CONFIG_KASAN_EXTRA=n have been merged by maintainers now, so we can
bring back that default now.  KASAN_EXTRA=y still causes lots of
warnings but now defaults to !COMPILE_TEST to disable it in
allmodconfig, and it remains disabled in all other defconfigs since it
is a new option.  I arbitrarily raise the warning limit for KASAN_EXTRA
to 3072 to reduce the noise, but an allmodconfig kernel still has around
50 warnings on gcc-7.

I experimented a bit more with smaller stack frames and have another
follow-up series that reduces the warning limit for 64-bit architectures
to 1280 bytes (without CONFIG_KASAN).

With earlier versions of this patch series, I also had patches to address
the warnings we get with KASAN and/or KASAN_EXTRA, using a
"noinline_if_stackbloat" annotation.

That annotation now got replaced with a gcc-8 bugfix (see
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715) and a workaround for
older compilers, which means that KASAN_EXTRA is now just as bad as
before and will lead to an instant stack overflow in a few extreme
cases.

This reverts parts of commit 3f181b4d8652 ("lib/Kconfig.debug: disable
-Wframe-larger-than warnings with KASAN=y").  Two patches in linux-next
should be merged first to avoid introducing warnings in an allmodconfig
build:
  3cd890dbe2a4 ("media: dvb-frontends: fix i2c access helpers for KASAN")
  16c3ada89cff ("media: r820t: fix r820t_write_reg for KASAN")

Do we really need to backport this?

I think we do: without this patch, enabling KASAN will lead to
unavoidable kernel stack overflow in certain device drivers when built
with gcc-7 or higher on linux-4.10+ or any version that contains a
backport of commit c5caf21ab0cf8.  Most people are probably still on
older compilers, but it will get worse over time as they upgrade their
distros.

The warnings we get on kernels older than this should all be for code
that uses dangerously large stack frames, though most of them do not
cause an actual stack overflow by themselves.The asan-stack option was
added in linux-4.0, and commit 3f181b4d8652 ("lib/Kconfig.debug:
disable -Wframe-larger-than warnings with KASAN=y") effectively turned
off the warning for allmodconfig kernels, so I would like to see this
fix backported to any kernels later than 4.0.

I have done dozens of fixes for individual functions with stack frames
larger than 2048 bytes with asan-stack, and I plan to make sure that
all those fixes make it into the stable kernels as well (most are
already there).

Part of the complication here is that asan-stack (from 4.0) was
originally assumed to always require much larger stacks, but that
turned out to be a combination of multiple gcc bugs that we have now
worked around and fixed, but sanitize-address-use-after-scope (from
v4.10) has a much higher inherent stack usage and also suffers from at
least three other problems that we have analyzed but not yet fixed
upstream, each of them makes the stack usage more severe than it should
be.

Link: http://lkml.kernel.org/r/20171221134744.2295529-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agocrash_dump: is_kdump_kernel can be boolean
Yaowei Bai [Tue, 6 Feb 2018 23:41:38 +0000 (15:41 -0800)]
crash_dump: is_kdump_kernel can be boolean

Make is_kdump_kernel return bool due to this particular function only
using either one or zero as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513308799-19232-8-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokernel/mutex: mutex_is_locked can be boolean
Yaowei Bai [Tue, 6 Feb 2018 23:41:35 +0000 (15:41 -0800)]
kernel/mutex: mutex_is_locked can be boolean

Make mutex_is_locked return bool due to this particular function only
using either one or zero as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513266622-15860-7-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokernel/module: module_is_live can be boolean
Yaowei Bai [Tue, 6 Feb 2018 23:41:31 +0000 (15:41 -0800)]
kernel/module: module_is_live can be boolean

Make module_is_live return bool due to this particular function only using
either one or zero as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513266622-15860-6-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokernel/resource: iomem_is_exclusive can be boolean
Yaowei Bai [Tue, 6 Feb 2018 23:41:28 +0000 (15:41 -0800)]
kernel/resource: iomem_is_exclusive can be boolean

Make iomem_is_exclusive return bool due to this particular function only
using either one or zero as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513266622-15860-5-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokernel/cpuset: current_cpuset_is_being_rebound can be boolean
Yaowei Bai [Tue, 6 Feb 2018 23:41:24 +0000 (15:41 -0800)]
kernel/cpuset: current_cpuset_is_being_rebound can be boolean

Make current_cpuset_is_being_rebound return bool due to this particular
function only using either one or zero as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513266622-15860-4-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agolib/lockref: __lockref_is_dead can be boolean
Yaowei Bai [Tue, 6 Feb 2018 23:41:21 +0000 (15:41 -0800)]
lib/lockref: __lockref_is_dead can be boolean

Make __lockref_is_dead return bool due to this function only using either
true or false as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513266622-15860-3-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm/memblock: memblock_is_map/region_memory can be boolean
Yaowei Bai [Tue, 6 Feb 2018 23:41:18 +0000 (15:41 -0800)]
mm/memblock: memblock_is_map/region_memory can be boolean

Make memblock_is_map/region_memory return bool due to these two
functions only using either true or false as its return value.

No functional change.

Link: http://lkml.kernel.org/r/1513266622-15860-2-git-send-email-baiyaowei@cmss.chinamobile.com
Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agogenirq: remove unneeded kallsyms include
Sergey Senozhatsky [Tue, 6 Feb 2018 23:41:13 +0000 (15:41 -0800)]
genirq: remove unneeded kallsyms include

The file was converted from print_symbol() to %pf some time ago in
commit ef26f20cd117 ("genirq: Print threaded handler in spurious debug
output").  kallsyms does not seem to be needed anymore.

Link: http://lkml.kernel.org/r/20171208025616.16267-10-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agohrtimer: remove unneeded kallsyms include
Sergey Senozhatsky [Tue, 6 Feb 2018 23:41:10 +0000 (15:41 -0800)]
hrtimer: remove unneeded kallsyms include

hrtimer does not seem to use any of kallsyms functions/defines.

Link: http://lkml.kernel.org/r/20171208025616.16267-9-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm: remove unneeded kallsyms include
Sergey Senozhatsky [Tue, 6 Feb 2018 23:41:06 +0000 (15:41 -0800)]
mm: remove unneeded kallsyms include

The file was converted from print_symbol() to %pSR a while ago in commit
071361d3473e ("mm: Convert print_symbol to %pSR").  kallsyms does not
seem to be needed anymore.

Link: http://lkml.kernel.org/r/20171208025616.16267-3-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm/userfaultfd.c: remove duplicate include
Pravin Shedge [Tue, 6 Feb 2018 23:41:03 +0000 (15:41 -0800)]
mm/userfaultfd.c: remove duplicate include

These duplicate includes have been found with scripts/checkincludes.pl but
they have been removed manually to avoid removing false positives.

Link: http://lkml.kernel.org/r/1512580957-6071-1-git-send-email-pravin.shedge4linux@gmail.com
Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agovfs: remove might_sleep() from clear_inode()
Shakeel Butt [Tue, 6 Feb 2018 23:40:59 +0000 (15:40 -0800)]
vfs: remove might_sleep() from clear_inode()

Commit 7994e6f72543 ("vfs: Move waiting for inode writeback from
end_writeback() to evict_inode()") removed inode_sync_wait() from
end_writeback() and commit dbd5768f87ff ("vfs: Rename end_writeback() to
clear_inode()") renamed end_writeback() to clear_inode().

After these patches there is no sleeping operation in clear_inode().
So, remove might_sleep() from it.

Link: http://lkml.kernel.org/r/20171108004354.40308-1-shakeelb@google.com
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Greg Thelen <gthelen@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoarch/score/kernel/setup.c: combine two seq_printf() calls into one call in show_cpuinfo()
Markus Elfring [Tue, 6 Feb 2018 23:40:56 +0000 (15:40 -0800)]
arch/score/kernel/setup.c: combine two seq_printf() calls into one call in show_cpuinfo()

Some data were printed into a sequence by two separate function calls.
Print the same data by a single function call instead.

This issue was detected by using the Coccinelle software.

Link: http://lkml.kernel.org/r/ddcfff3a-9502-6ce0-b08a-365eb55ce958@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoipc/mqueue.c: have RT tasks queue in by priority in wq_add()
Jonathan Haws [Tue, 6 Feb 2018 23:40:52 +0000 (15:40 -0800)]
ipc/mqueue.c: have RT tasks queue in by priority in wq_add()

Previous behavior added tasks to the work queue using the static_prio
value instead of the dynamic priority value in prio.  This caused RT tasks
to be added to the work queue in a FIFO manner rather than by priority.
Normal tasks were handled by priority.

This fix utilizes the dynamic priority of the task to ensure that both RT
and normal tasks are added to the work queue in priority order.  Utilizing
the dynamic priority (prio) rather than the base priority (normal_prio)
was chosen to ensure that if a task had a boosted priority when it was
added to the work queue, it would be woken sooner to to ensure that it
releases any other locks it may be holding in a more timely manner.  It is
understood that the task could have a lower priority when it wakes than
when it was added to the queue in this (unlikely) case.

Link: http://lkml.kernel.org/r/1513006652-7014-1-git-send-email-jhaws@sdl.usu.edu
Signed-off-by: Jonathan Haws <jhaws@sdl.usu.edu>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoipc: fix ipc data structures inconsistency
Philippe Mikoyan [Tue, 6 Feb 2018 23:40:49 +0000 (15:40 -0800)]
ipc: fix ipc data structures inconsistency

As described in the title, this patch fixes <ipc>id_ds inconsistency when
<ipc>ctl_stat executes concurrently with some ds-changing function, e.g.
shmat, msgsnd or whatever.

For instance, if shmctl(IPC_STAT) is running concurrently
with shmat, following data structure can be returned:
{... shm_lpid = 0, shm_nattch = 1, ...}

Link: http://lkml.kernel.org/r/20171202153456.6514-1-philippe.mikoyan@skat.systems
Signed-off-by: Philippe Mikoyan <philippe.mikoyan@skat.systems>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agolib/ubsan: remove returns-nonnull-attribute checks
Andrey Ryabinin [Tue, 6 Feb 2018 23:40:45 +0000 (15:40 -0800)]
lib/ubsan: remove returns-nonnull-attribute checks

Similarly to type mismatch checks, new GCC 8.x and Clang also changed for
ABI for returns_nonnull checks.  While we can update our code to conform
the new ABI it's more reasonable to just remove it.  Because it's just
dead code, we don't have any single user of returns_nonnull attribute in
the whole kernel.

And AFAIU the advantage that this attribute could bring would be mitigated
by -fno-delete-null-pointer-checks cflag that we use to build the kernel.
So it's unlikely we will have a lot of returns_nonnull attribute in
future.

So let's just remove the code, it has no use.

[aryabinin@virtuozzo.com: fix warning]
Link: http://lkml.kernel.org/r/20180122165711.11510-1-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/20180119152853.16806-2-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Sodagudi Prasad <psodagud@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agolib/ubsan: add type mismatch handler for new GCC/Clang
Andrey Ryabinin [Tue, 6 Feb 2018 23:40:42 +0000 (15:40 -0800)]
lib/ubsan: add type mismatch handler for new GCC/Clang

UBSAN=y fails to build with new GCC/clang:

    arch/x86/kernel/head64.o: In function `sanitize_boot_params':
    arch/x86/include/asm/bootparam_utils.h:37: undefined reference to `__ubsan_handle_type_mismatch_v1'

because Clang and GCC 8 slightly changed ABI for 'type mismatch' errors.
Compiler now uses new __ubsan_handle_type_mismatch_v1() function with
slightly modified 'struct type_mismatch_data'.

Let's add new 'struct type_mismatch_data_common' which is independent from
compiler's layout of 'struct type_mismatch_data'.  And make
__ubsan_handle_type_mismatch[_v1]() functions transform compiler-dependent
type mismatch data to our internal representation.  This way, we can
support both old and new compilers with minimal amount of change.

Link: http://lkml.kernel.org/r/20180119152853.16806-1-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Sodagudi Prasad <psodagud@codeaurora.org>
Cc: <stable@vger.kernel.org> [4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agolib/ubsan.c: s/missaligned/misaligned/
Andrew Morton [Tue, 6 Feb 2018 23:40:38 +0000 (15:40 -0800)]
lib/ubsan.c: s/missaligned/misaligned/

A vist from the spelling fairy.

Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agobuild_bug.h: remove BUILD_BUG_ON_NULL()
Masahiro Yamada [Tue, 6 Feb 2018 23:40:35 +0000 (15:40 -0800)]
build_bug.h: remove BUILD_BUG_ON_NULL()

This macro is only used by net/ipv6/mcast.c, but there is no reason
why it must be BUILD_BUG_ON_NULL().

Replace it with BUILD_BUG_ON_ZERO(), and remove BUILD_BUG_ON_NULL()
definition from <linux/build_bug.h>.

Link: http://lkml.kernel.org/r/1515121833-3174-3-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoinclude/linux/genl_magic_func.h: remove own BUILD_BUG_ON*() defines
Masahiro Yamada [Tue, 6 Feb 2018 23:40:31 +0000 (15:40 -0800)]
include/linux/genl_magic_func.h: remove own BUILD_BUG_ON*() defines

Do not duplicate BUILD_BUG_ON*.  Use ones from <linux/build_bug.h>.

Link: http://lkml.kernel.org/r/1515121833-3174-2-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokcov: detect double association with a single task
Dmitry Vyukov [Tue, 6 Feb 2018 23:40:28 +0000 (15:40 -0800)]
kcov: detect double association with a single task

Currently KCOV_ENABLE does not check if the current task is already
associated with another kcov descriptor.  As the result it is possible
to associate a single task with more than one kcov descriptor, which
later leads to a memory leak of the old descriptor.  This relation is
really meant to be one-to-one (task has only one back link).

Extend validation to detect such misuse.

Link: http://lkml.kernel.org/r/20180122082520.15716-1-dvyukov@google.com
Fixes: 5c9a8750a640 ("kernel: add kcov code coverage")
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Reported-by: Shankara Pailoor <sp3485@columbia.edu>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokernel/relay.c: revert "kernel/relay.c: fix potential memory leak"
Eric Biggers [Tue, 6 Feb 2018 23:40:24 +0000 (15:40 -0800)]
kernel/relay.c: revert "kernel/relay.c: fix potential memory leak"

This reverts commit ba62bafe942b ("kernel/relay.c: fix potential memory leak").

This commit introduced a double free bug, because 'chan' is already
freed by the line:

    kref_put(&chan->kref, relay_destroy_channel);

This bug was found by syzkaller, using the BLKTRACESETUP ioctl.

Link: http://lkml.kernel.org/r/20180127004759.101823-1-ebiggers3@gmail.com
Fixes: ba62bafe942b ("kernel/relay.c: fix potential memory leak")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Zhouyi Zhou <yizhouzhou@ict.ac.cn>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: <stable@vger.kernel.org> [4.7+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopps: parport: use timespec64 instead of timespec
Arnd Bergmann [Tue, 6 Feb 2018 23:40:21 +0000 (15:40 -0800)]
pps: parport: use timespec64 instead of timespec

getnstimeofday() is deprecated, so I'm converting this to use
ktime_get_real_ts64() as a safe replacement.  I considered using
ktime_get_real() instead, but since the algorithm here depends on the
exact timing, I decided to introduce fewer changes and leave the code
that determines the nanoseconds since the last seconds wrap untouched.

It's not entirely clear to me whether we should also change the time
base to CLOCK_BOOTTIME or CLOCK_TAI.  With boottime, we would be
independent of changes due to settimeofday() and only see the speed
adjustment from the upstream clock source, with the downside of having
the signal be at an arbirary offset from the start of the UTC second
signal.  With CLOCK_TAI, we would use the same offset from the UTC
second as before and still suffer from settimeofday() adjustments, but
would be less confused during leap seconds.

Both boottime and tai only offer usable (i.e.  avoiding ktime_t to
timespec64 conversion) interfaces for ktime_t though, so either way,
changing it wouldn't take significantly more work.  CLOCK_MONOTONIC
could be used with ktime_get_ts64(), but would lose synchronization
across a suspend/resume cycle, which seems worse.

Link: http://lkml.kernel.org/r/20180116171451.3095620-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agopids: introduce find_get_task_by_vpid() helper
Mike Rapoport [Tue, 6 Feb 2018 23:40:17 +0000 (15:40 -0800)]
pids: introduce find_get_task_by_vpid() helper

There are several functions that do find_task_by_vpid() followed by
get_task_struct().  We can use a helper function instead.

Link: http://lkml.kernel.org/r/1509602027-11337-1-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agodrivers/rapidio/devices/tsi721_dma.c: adjust six checks for null pointers
Markus Elfring [Tue, 6 Feb 2018 23:40:13 +0000 (15:40 -0800)]
drivers/rapidio/devices/tsi721_dma.c: adjust six checks for null pointers

checkpatch pointed out the following:

  Comparison to NULL could be written !...

Thus fix the affected source code places.

Link: http://lkml.kernel.org/r/c3e79a1a-891e-cb62-990f-bd99839311b9@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agodrivers/rapidio/devices/tsi721_dma.c: delete an unnecessary variable initialisation...
Markus Elfring [Tue, 6 Feb 2018 23:40:10 +0000 (15:40 -0800)]
drivers/rapidio/devices/tsi721_dma.c: delete an unnecessary variable initialisation in tsi721_alloc_chan_resources()

The local variable "desc" will eventually be set to an appropriate pointer
a bit later. Thus omit the explicit initialisation at the beginning.

Link: http://lkml.kernel.org/r/728d8e20-4ae9-d661-d932-2d99ce67e71f@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agodrivers/rapidio/devices/tsi721_dma.c: delete an error message for a failed memory...
Markus Elfring [Tue, 6 Feb 2018 23:40:06 +0000 (15:40 -0800)]
drivers/rapidio/devices/tsi721_dma.c: delete an error message for a failed memory allocation in tsi721_alloc_chan_resources()

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Link: http://lkml.kernel.org/r/a96fcaf8-ea24-bcac-0214-273620349d42@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agorapidio: move 12 EXPORT_SYMBOL_GPL() calls to function implementations
Markus Elfring [Tue, 6 Feb 2018 23:40:01 +0000 (15:40 -0800)]
rapidio: move 12 EXPORT_SYMBOL_GPL() calls to function implementations

checkpatch pointed information out like the following.

  WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable

Thus fix the affected source code places.

Link: http://lkml.kernel.org/r/5f51f606-ece8-7bff-bb86-81d182c49b98@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agorapidio: return an error code only as a constant in two functions
Markus Elfring [Tue, 6 Feb 2018 23:39:58 +0000 (15:39 -0800)]
rapidio: return an error code only as a constant in two functions

* Return an error code without storing it in an intermediate variable.

* Delete the label "out" and local variable "rc" which became unnecessary
  with this refactoring.

Link: http://lkml.kernel.org/r/8db441e1-c227-64e7-4747-095da63d7a2e@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agorapidio: delete an unnecessary variable initialisation in three functions
Markus Elfring [Tue, 6 Feb 2018 23:39:55 +0000 (15:39 -0800)]
rapidio: delete an unnecessary variable initialisation in three functions

The local variable "rc" will be set to an appropriate value a bit later.
Thus omit the explicit initialisation at the beginning.

Link: http://lkml.kernel.org/r/ed729e8c-815c-8b56-a48f-1be579d0cc2b@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agorapidio: improve a size determination in five functions
Markus Elfring [Tue, 6 Feb 2018 23:39:51 +0000 (15:39 -0800)]
rapidio: improve a size determination in five functions

Replace the specification of data structures by pointer dereferences as
the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style
convention.

This issue was detected by using the Coccinelle software.

Link: http://lkml.kernel.org/r/495f571c-fb4d-b1d5-a6e5-494f2c537a8d@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agorapidio: adjust five function calls together with a variable assignment
Markus Elfring [Tue, 6 Feb 2018 23:39:48 +0000 (15:39 -0800)]
rapidio: adjust five function calls together with a variable assignment

checkpatch pointed information out like the following.

  ERROR: do not use assignment in if condition

Thus fix the affected source code places.

Link: http://lkml.kernel.org/r/6f5631ed-ec3e-503d-850a-ab09b5736dbe@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agorapidio: adjust 12 checks for null pointers
Markus Elfring [Tue, 6 Feb 2018 23:39:44 +0000 (15:39 -0800)]
rapidio: adjust 12 checks for null pointers

checkpatch pointed information out like the following.

  Comparison to NULL could be written ...

Thus fix the affected source code places.

Link: http://lkml.kernel.org/r/739f9f1c-3ebe-c21b-c5e2-31976cfbc0ee@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agorapidio: delete an error message for a failed memory allocation in rio_init_mports()
Markus Elfring [Tue, 6 Feb 2018 23:39:41 +0000 (15:39 -0800)]
rapidio: delete an error message for a failed memory allocation in rio_init_mports()

Patch series "RapidIO: Adjustments for some function implementations".

This patch (of 7):

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Link: http://lkml.kernel.org/r/dfd6887b-2521-cbf2-af5b-e70b5fa4c33c@users.sourceforge.net
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agocpumask: make cpumask_size() return "unsigned int"
Alexey Dobriyan [Tue, 6 Feb 2018 23:39:37 +0000 (15:39 -0800)]
cpumask: make cpumask_size() return "unsigned int"

CPUmasks are never big enough to warrant 64-bit code.

Space savings:

add/remove: 0/0 grow/shrink: 1/4 up/down: 3/-17 (-14)
Function                                     old     new   delta
sched_init_numa                             1530    1533      +3
compat_sys_sched_setaffinity                 160     159      -1
sys_sched_getaffinity                        197     195      -2
sys_sched_setaffinity                        183     176      -7
compat_sys_sched_getaffinity                 179     172      -7

Link: http://lkml.kernel.org/r/20171204165531.GA8221@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>