sfrench/cifs-2.6.git
3 years agobtrfs: Remove fs_info from btrfs_alloc_logged_file_extent
Nikolay Borisov [Wed, 20 Jun 2018 12:49:13 +0000 (15:49 +0300)]
btrfs: Remove fs_info from btrfs_alloc_logged_file_extent

It can be referenced from trans since the function is always called
within a valid transaction.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from remove_extent_backref
Nikolay Borisov [Wed, 20 Jun 2018 12:49:12 +0000 (15:49 +0300)]
btrfs: Remove fs_info from remove_extent_backref

It can be referenced directly from the transaction handle since it's
always valid.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from run_one_delayed_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:49:11 +0000 (15:49 +0300)]
btrfs: Remove fs_info from run_one_delayed_ref

It can be referenced from the passed transaction handle, since it's
always valid.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from insert_inline_extent_backref
Nikolay Borisov [Wed, 20 Jun 2018 12:49:10 +0000 (15:49 +0300)]
btrfs: Remove fs_info from insert_inline_extent_backref

It can be referenced from the passed transaction handle, since it's
always valid.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from exclude_super_stripes
Nikolay Borisov [Wed, 20 Jun 2018 12:49:09 +0000 (15:49 +0300)]
btrfs: Remove fs_info from exclude_super_stripes

It can be referenced from the passed block group.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from free_excluded_extents
Nikolay Borisov [Wed, 20 Jun 2018 12:49:08 +0000 (15:49 +0300)]
btrfs: Remove fs_info from free_excluded_extents

It can be referenced from the passed block group.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from check_system_chunk
Nikolay Borisov [Wed, 20 Jun 2018 12:49:07 +0000 (15:49 +0300)]
btrfs: Remove fs_info from check_system_chunk

It can be referenced from trans since the function is always called
within a transaction.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from btrfs_alloc_chunk
Nikolay Borisov [Wed, 20 Jun 2018 12:49:06 +0000 (15:49 +0300)]
btrfs: Remove fs_info from btrfs_alloc_chunk

It can be referenced from trans since the function is always called
within a transaction.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from do_chunk_alloc
Nikolay Borisov [Wed, 20 Jun 2018 12:49:05 +0000 (15:49 +0300)]
btrfs: Remove fs_info from do_chunk_alloc

This function is always called with a valid transaction handle from
where fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from run_delayed_tree_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:49:04 +0000 (15:49 +0300)]
btrfs: Remove fs_info from run_delayed_tree_ref

It can always be referneced from the passed transaction handle since
it's always valid. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from cleanup_ref_head
Nikolay Borisov [Wed, 20 Jun 2018 12:49:03 +0000 (15:49 +0300)]
btrfs: Remove fs_info from cleanup_ref_head

fs_info can be refenreced from the transaction handle, since it's always
valid. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove unused fs_info from cleanup_extent_op
Nikolay Borisov [Wed, 20 Jun 2018 12:49:02 +0000 (15:49 +0300)]
btrfs: Remove unused fs_info from cleanup_extent_op

The argument is no longer used so remove it.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from run_delayed_extent_op
Nikolay Borisov [Wed, 20 Jun 2018 12:49:01 +0000 (15:49 +0300)]
btrfs: Remove fs_info from run_delayed_extent_op

This function is always called with a valid transaction handle so
fs_info can be referenced from there. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from run_delayed_data_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:49:00 +0000 (15:49 +0300)]
btrfs: Remove fs_info from run_delayed_data_ref

This function is always called with a valid transaction from where
fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info argument from __btrfs_inc_extent_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:59 +0000 (15:48 +0300)]
btrfs: Remove fs_info argument from __btrfs_inc_extent_ref

This function already takes a transaction which holds a reference to
the fs_info struct. Use that reference and remove the extra arg. No
functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from alloc_reserved_file_extent
Nikolay Borisov [Wed, 20 Jun 2018 12:48:58 +0000 (15:48 +0300)]
btrfs: Remove fs_info from alloc_reserved_file_extent

fs_info can be referenced from the transaction handle, which is always
valid. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from __btrfs_free_extent
Nikolay Borisov [Wed, 20 Jun 2018 12:48:57 +0000 (15:48 +0300)]
btrfs: Remove fs_info from __btrfs_free_extent

This function is always called with a valid transaction handle so we
can reference the fs_info from there. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from btrfs_remove_block_group
Nikolay Borisov [Wed, 20 Jun 2018 12:48:56 +0000 (15:48 +0300)]
btrfs: Remove fs_info from btrfs_remove_block_group

This function is always called with a valid transaction handle from
where we can reference fs_info. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from btrfs_make_block_group
Nikolay Borisov [Wed, 20 Jun 2018 12:48:55 +0000 (15:48 +0300)]
btrfs: Remove fs_info from btrfs_make_block_group

This function is always called with a valid transaction handle from
where we can reference the fs_info. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from btrfs_add_delayed_data_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:54 +0000 (15:48 +0300)]
btrfs: Remove fs_info from btrfs_add_delayed_data_ref

This function is always called with a valid transaction handle from
where fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from btrfs_add_delayed_tree_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:53 +0000 (15:48 +0300)]
btrfs: Remove fs_info from btrfs_add_delayed_tree_ref

This function is always called with a valid transaction handle from
where fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from lookup_extent_backref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:52 +0000 (15:48 +0300)]
btrfs: Remove fs_info from lookup_extent_backref

This argument is unused. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info argument from lookup_extent_data_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:51 +0000 (15:48 +0300)]
btrfs: Remove fs_info argument from lookup_extent_data_ref

This function is always called with a valid transaction handle from
where fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info argument from lookup_tree_block_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:50 +0000 (15:48 +0300)]
btrfs: Remove fs_info argument from lookup_tree_block_ref

This function is always called with a valid transaction handle from
where the fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info argument from update_inline_extent_backref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:49 +0000 (15:48 +0300)]
btrfs: Remove fs_info argument from update_inline_extent_backref

This function always uses the leaf's extent_buffer which already
contains a reference to the fs_info. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from lookup_inline_extent_backref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:48 +0000 (15:48 +0300)]
btrfs: Remove fs_info from lookup_inline_extent_backref

This function is always called with a valid transaction handle from
where the fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from fixup_low_keys
Nikolay Borisov [Wed, 20 Jun 2018 12:48:47 +0000 (15:48 +0300)]
btrfs: Remove fs_info from fixup_low_keys

This argument is unused. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from remove_extent_data_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:46 +0000 (15:48 +0300)]
btrfs: Remove fs_info from remove_extent_data_ref

This function is always called with a valid transaction from where the
fs_info can be referenced. No functional change.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info argument from insert_extent_backref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:45 +0000 (15:48 +0300)]
btrfs: Remove fs_info argument from insert_extent_backref

This function is always called with a valid transaction handle from
where fs_info can be referenced. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from insert_extent_data_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:44 +0000 (15:48 +0300)]
btrfs: Remove fs_info from insert_extent_data_ref

This function is always called with a valid transaction handle from
where fs_info can be referenced. So remove the redundant argument.
No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Remove fs_info from insert_tree_block_ref
Nikolay Borisov [Wed, 20 Jun 2018 12:48:43 +0000 (15:48 +0300)]
btrfs: Remove fs_info from insert_tree_block_ref

This function is always called with a valid transaction so there is no
need to duplicate the fs_info, we can reference it directly from the
trans handle. No functional changes.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Fix a C compliance issue
Bart Van Assche [Wed, 20 Jun 2018 17:03:33 +0000 (10:03 -0700)]
btrfs: Fix a C compliance issue

The C programming language does not allow to use preprocessor statements
inside macro arguments (pr_info() is defined as a macro). Hence rework
the pr_info() statement in btrfs_print_mod_info() such that it becomes
compliant. This patch allows tools like sparse to analyze the BTRFS
source code.

Fixes: 62e855771dac ("btrfs: convert printk(KERN_* to use pr_* calls")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Annotate fall-through when parsing mount option
Bart Van Assche [Wed, 20 Jun 2018 17:03:32 +0000 (10:03 -0700)]
btrfs: Annotate fall-through when parsing mount option

This patch avoids that the compiler complains that a fall-through
annotation is missing when building with W=1.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Fix misleading indentation reported by smatch
Bart Van Assche [Wed, 20 Jun 2018 17:03:31 +0000 (10:03 -0700)]
btrfs: Fix misleading indentation reported by smatch

This patch avoids that building the BTRFS source code with smatch
triggers complaints about inconsistent indenting.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Streamline log_extent_csums a bit
Nikolay Borisov [Wed, 20 Jun 2018 14:26:42 +0000 (17:26 +0300)]
btrfs: Streamline log_extent_csums a bit

Currently this function takes the root as an argument only to get the
log_root from it. Simplify this by directly passing the log root from
the caller. Also eliminate the fs_info local variable, since it's used
only once, so directly reference it from the transaction handle.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: remove remaing full_sync logic from btrfs_sync_file
David Sterba [Thu, 19 Jul 2018 13:27:46 +0000 (15:27 +0200)]
btrfs: remove remaing full_sync logic from btrfs_sync_file

The logic to check if the inode is already in the log can now be
simplified since we always wait for the ordered extents to complete
before deciding whether the inode needs to be logged. The big comment
about it can go away too.

CC: Filipe Manana <fdmanana@suse.com>
Suggested-by: Filipe Manana <fdmanana@suse.com>
[ code and changelog copied from mail discussion ]
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: remove the logged extents infrastructure
Josef Bacik [Wed, 23 May 2018 15:58:36 +0000 (11:58 -0400)]
btrfs: remove the logged extents infrastructure

This is no longer used anywhere, remove all of it.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: clean up the left over logged_list usage
Josef Bacik [Wed, 23 May 2018 15:58:35 +0000 (11:58 -0400)]
btrfs: clean up the left over logged_list usage

We no longer use this list we've passed around so remove it everywhere.
Also remove the extra checks for ordered/filemap errors as this is
handled higher up now that we're waiting on ordered_extents before
getting to the tree log code.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: remove the wait ordered logic in the log_one_extent path
Josef Bacik [Wed, 23 May 2018 15:58:34 +0000 (11:58 -0400)]
btrfs: remove the wait ordered logic in the log_one_extent path

Since we are waiting on all ordered extents at the start of the fsync()
path we don't need to wait on any logged ordered extents, and we don't
need to look up the checksums on the ordered extents as they will
already be on disk prior to getting here.  Rework this so we're only
looking up and copying the on-disk checksums for the extent range we
care about.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: always wait on ordered extents at fsync time
Josef Bacik [Wed, 23 May 2018 15:58:33 +0000 (11:58 -0400)]
btrfs: always wait on ordered extents at fsync time

There's a priority inversion that exists currently with btrfs fsync.  In
some cases we will collect outstanding ordered extents onto a list and
only wait on them at the very last second.  However this "very last
second" falls inside of a transaction handle, so if we are in a lower
priority cgroup we can end up holding the transaction open for longer
than needed, so if a high priority cgroup is also trying to fsync()
it'll see latency.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Fix comment in lookup_inline_extent_backref
Nikolay Borisov [Mon, 18 Jun 2018 11:59:26 +0000 (14:59 +0300)]
btrfs: Fix comment in lookup_inline_extent_backref

The comment wrongfully states that the owner parameter is the level of
the parent block. In fact owner is the level of the current block and
by adding 1 to it we can eventually get to the parent/root.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: Document __btrfs_inc_extent_ref
Nikolay Borisov [Mon, 18 Jun 2018 11:59:25 +0000 (14:59 +0300)]
btrfs: Document __btrfs_inc_extent_ref

Here is a doc-only patch which tires to deobfuscate the terra-incognita
that arguments for delayed refs are.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: scrub: Remove unused copy_nocow_pages and its callchain
Qu Wenruo [Wed, 6 Jun 2018 05:13:12 +0000 (13:13 +0800)]
btrfs: scrub: Remove unused copy_nocow_pages and its callchain

Since commit ac0b4145d662a3b9e340 ("btrfs: scrub: Don't use inode pages
for device replace") the function is not used and we can remove all
functions down the call chain.

There was an optimization that reused inode pages to speed up device
replace, but broke when there was nodatasum and compressed page. The
potential performance gain is small so we don't loose much by removing
it and using scrub_pages same as the other pages.

Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agobtrfs: replace get_seconds with new 64bit time API
Allen Pais [Tue, 12 Jun 2018 11:48:25 +0000 (17:18 +0530)]
btrfs: replace get_seconds with new 64bit time API

The get_seconds() function is deprecated as it truncates the timestamp
to 32 bits. Change it to or ktime_get_real_seconds().

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
3 years agoLinux 4.18-rc8 v4.18-rc8
Linus Torvalds [Sun, 5 Aug 2018 19:37:41 +0000 (12:37 -0700)]
Linux 4.18-rc8

3 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 5 Aug 2018 16:39:30 +0000 (09:39 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fix from Thomas Gleixner:
 "A single fix, which addresses boot failures on machines which do not
  report EBDA correctly, which can place the trampoline into reserved
  memory regions. Validating against E820 prevents that"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot/compressed/64: Validate trampoline placement against E820

3 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 5 Aug 2018 16:25:29 +0000 (09:25 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "Two oneliners addressing NOHZ failures:

   - Use a bitmask to check for the pending timer softirq and not the
     bit number. The existing code using the bit number checked for
     the wrong bit, which caused timers to either expire late or stop
     completely.

   - Make the nohz evaluation on interrupt exit more robust. The
     existing code did not re-arm the hardware when interrupting a
     running softirq in task context (ksoftirqd or tail of
     local_bh_enable()), which caused timers to either expire late
     or stop completely"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  nohz: Fix missing tick reprogram when interrupting an inline softirq
  nohz: Fix local_timer_softirq_pending()

3 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 5 Aug 2018 16:13:07 +0000 (09:13 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "A set of fixes for perf:

  Kernel side:

   - Fix the hardcoded index of extra PCI devices on Broadwell which
     caused a resource conflict and triggered warnings on CPU hotplug.

  Tooling:

   - Update the tools copy of several files, including perf_event.h,
     powerpc's asm/unistd.h (new io_pgetevents syscall), bpf.h and x86's
     memcpy_64.s (used in 'perf bench mem'), silencing the respective
     warnings during the perf tools build.

   - Fix the build on the alpine:edge distro"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/uncore: Fix hardcoded index of Broadwell extra PCI devices
  perf tools: Fix the build on the alpine:edge distro
  tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'
  tools headers uapi: Refresh linux/bpf.h copy
  tools headers powerpc: Update asm/unistd.h copy to pick new
  tools headers uapi: Update tools's copy of linux/perf_event.h

3 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 5 Aug 2018 15:55:26 +0000 (08:55 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fix from Thomas Gleixner:
 "A single bugfix for the irq core to prevent silent data corruption and
  malfunction of threaded interrupts under certain conditions"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Make force irq threading setup more robust

3 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Sun, 5 Aug 2018 15:20:39 +0000 (08:20 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Handle frames in error situations properly in AF_XDP, from Jakub
    Kicinski.

 2) tcp_mmap test case only tests ipv6 due to a thinko, fix from
    Maninder Singh.

 3) Session refcnt fix in l2tp_ppp, from Guillaume Nault.

 4) Fix regression in netlink bind handling of multicast gruops, from
    Dmitry Safonov.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  netlink: Don't shift on 64 for ngroups
  net/smc: no cursor update send in state SMC_INIT
  l2tp: fix missing refcount drop in pppol2tp_tunnel_ioctl()
  mlxsw: core_acl_flex_actions: Remove redundant mirror resource destruction
  mlxsw: core_acl_flex_actions: Remove redundant counter destruction
  mlxsw: core_acl_flex_actions: Remove redundant resource destruction
  mlxsw: core_acl_flex_actions: Return error for conflicting actions
  selftests/bpf: update test_lwt_seg6local.sh according to iproute2
  drivers: net: lmc: fix case value for target abort error
  selftest/net: fix protocol family to work for IPv4.
  net: xsk: don't return frames via the allocator on error
  tools/bpftool: fix a percpu_array map dump problem

3 years agoMerge tag 'usercopy-fix-v4.18-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 5 Aug 2018 01:34:55 +0000 (18:34 -0700)]
Merge tag 'usercopy-fix-v4.18-rc8' of git://git./linux/kernel/git/kees/linux

Pull usercopy whitelisting fix from Kees Cook:
 "Bart Massey discovered that the usercopy whitelist for JFS was
  incomplete: the inline inode data may intentionally "overflow" into
  the neighboring "extended area", so the size of the whitelist needed
  to be raised to include the neighboring field"

* tag 'usercopy-fix-v4.18-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  jfs: Fix usercopy whitelist for inline inode data

3 years agoMerge tag 'xfs-4.18-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Sun, 5 Aug 2018 01:30:58 +0000 (18:30 -0700)]
Merge tag 'xfs-4.18-fixes-5' of git://git./fs/xfs/xfs-linux

Pull xfs bugfix from Darrick Wong:
 "One more patch for 4.18 to fix a coding error in the iomap_bmap()
  function introduced in -rc1: fix incorrect shifting"

* tag 'xfs-4.18-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  fs: fix iomap_bmap position calculation

3 years agoPartially revert "block: fail op_is_write() requests to read-only partitions"
Linus Torvalds [Fri, 3 Aug 2018 19:22:09 +0000 (12:22 -0700)]
Partially revert "block: fail op_is_write() requests to read-only partitions"

It turns out that commit 721c7fc701c7 ("block: fail op_is_write()
requests to read-only partitions"), while obviously correct, causes
problems for some older lvm2 installations.

The reason is that the lvm snapshotting will continue to write to the
snapshow COW volume, even after the volume has been marked read-only.
End result: snapshot failure.

This has actually been fixed in newer version of the lvm2 tool, but the
old tools still exist, and the breakage was reported both in the kernel
bugzilla and in the Debian bugzilla:

  https://bugzilla.kernel.org/show_bug.cgi?id=200439
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=900442

The lvm2 fix is here

  https://sourceware.org/git/?p=lvm2.git;a=commit;h=a6fdb9d9d70f51c49ad11a87ab4243344e6701a3

but until everybody has updated to recent versions, we'll have to weaken
the "never write to read-only partitions" check.  It now allows the
write to happen, but causes a warning, something like this:

  generic_make_request: Trying to write to read-only block-device dm-3 (partno X)
  Modules linked in: nf_tables xt_cgroup xt_owner kvm_intel iwlmvm kvm irqbypass iwlwifi
  CPU: 1 PID: 77 Comm: kworker/1:1 Not tainted 4.17.9-gentoo #3
  Hardware name: LENOVO 20B6A019RT/20B6A019RT, BIOS GJET91WW (2.41 ) 09/21/2016
  Workqueue: ksnaphd do_metadata
  RIP: 0010:generic_make_request_checks+0x4ac/0x600
  ...
  Call Trace:
   generic_make_request+0x64/0x400
   submit_bio+0x6c/0x140
   dispatch_io+0x287/0x430
   sync_io+0xc3/0x120
   dm_io+0x1f8/0x220
   do_metadata+0x1d/0x30
   process_one_work+0x1b9/0x3e0
   worker_thread+0x2b/0x3c0
   kthread+0x113/0x130
   ret_from_fork+0x35/0x40

Note that this is a "revert" in behavior only.  I'm leaving alone the
actual code cleanups in commit 721c7fc701c7, but letting the previously
uncaught request go through with a warning instead of stopping it.

Fixes: 721c7fc701c7 ("block: fail op_is_write() requests to read-only partitions")
Reported-and-tested-by: WGH <wgh@torlan.ru>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agonetlink: Don't shift on 64 for ngroups
Dmitry Safonov [Sun, 5 Aug 2018 00:35:53 +0000 (01:35 +0100)]
netlink: Don't shift on 64 for ngroups

It's legal to have 64 groups for netlink_sock.

As user-supplied nladdr->nl_groups is __u32, it's possible to subscribe
only to first 32 groups.

The check for correctness of .bind() userspace supplied parameter
is done by applying mask made from ngroups shift. Which broke Android
as they have 64 groups and the shift for mask resulted in an overflow.

Fixes: 61f4b23769f0 ("netlink: Don't shift with UB on nlk->ngroups")
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: netdev@vger.kernel.org
Cc: stable@vger.kernel.org
Reported-and-Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Sun, 5 Aug 2018 00:51:55 +0000 (17:51 -0700)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2018-08-05

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Fix bpftool percpu_array dump by using correct roundup to next
   multiple of 8 for the value size, from Yonghong.

2) Fix in AF_XDP's __xsk_rcv_zc() to not returning frames back to
   allocator since driver will recycle frame anyway in case of an
   error, from Jakub.

3) Fix up BPF test_lwt_seg6local test cases to final iproute2
   syntax, from Mathieu.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agonet/smc: no cursor update send in state SMC_INIT
Ursula Braun [Fri, 3 Aug 2018 08:38:33 +0000 (10:38 +0200)]
net/smc: no cursor update send in state SMC_INIT

If a writer blocked condition is received without data, the current
consumer cursor is immediately sent. Servers could already receive this
condition in state SMC_INIT without finished tx-setup. This patch
avoids sending a consumer cursor update in this case.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agojfs: Fix usercopy whitelist for inline inode data
Kees Cook [Fri, 3 Aug 2018 19:52:58 +0000 (12:52 -0700)]
jfs: Fix usercopy whitelist for inline inode data

Bart Massey reported what turned out to be a usercopy whitelist false
positive in JFS when symlink contents exceeded 128 bytes. The inline
inode data (i_inline) is actually designed to overflow into the "extended
area" following it (i_inline_ea) when needed. So the whitelist needed to
be expanded to include both i_inline and i_inline_ea (the whole size
of which is calculated internally using IDATASIZE, 256, instead of
sizeof(i_inline), 128).

$ cd /mnt/jfs
$ touch $(perl -e 'print "B" x 250')
$ ln -s B* b
$ ls -l >/dev/null

[  249.436410] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLUB object 'jfs_ip' (offset 616, size 250)!

Reported-by: Bart Massey <bart.massey@gmail.com>
Fixes: 8d2704d382a9 ("jfs: Define usercopy region in jfs_ip slab cache")
Cc: Dave Kleikamp <shaggy@kernel.org>
Cc: jfs-discussion@lists.sourceforge.net
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
3 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 3 Aug 2018 20:43:59 +0000 (13:43 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "Two vmx bugfixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  kvm: x86: vmx: fix vpid leak
  KVM: vmx: use local variable for current_vmptr when emulating VMPTRST

3 years agol2tp: fix missing refcount drop in pppol2tp_tunnel_ioctl()
Guillaume Nault [Fri, 3 Aug 2018 15:00:11 +0000 (17:00 +0200)]
l2tp: fix missing refcount drop in pppol2tp_tunnel_ioctl()

If 'session' is not NULL and is not a PPP pseudo-wire, then we fail to
drop the reference taken by l2tp_session_get().

Fixes: ecd012e45ab5 ("l2tp: filter out non-PPP sessions in pppol2tp_tunnel_ioctl()")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge branch 'mlxsw-Fix-ACL-actions-error-condition-handling'
David S. Miller [Fri, 3 Aug 2018 19:28:02 +0000 (12:28 -0700)]
Merge branch 'mlxsw-Fix-ACL-actions-error-condition-handling'

Ido Schimmel says:

====================
mlxsw: Fix ACL actions error condition handling

Nir says:

Two issues were lately noticed within mlxsw ACL actions error condition
handling. The first patch deals with conflicting actions such as:

 # tc filter add dev swp49 parent ffff: \
   protocol ip pref 10 flower skip_sw dst_ip 192.168.101.1 \
   action goto chain 100 \
   action mirred egress redirect dev swp4

The second action will never execute, however SW model allows this
configuration, while the mlxsw driver cannot allow for it as it
implements actions in sets of up to three actions per set with a single
termination marking. Conflicting actions create a contradiction over
this single marking and thus cannot be configured. The fix replaces a
misplaced warning with an error code to be returned.

Patches 2-4 fix a condition of duplicate destruction of resources. Some
actions require allocation of specific resource prior to setting the
action itself. On error condition this resource was destroyed twice,
leading to a crash when using mirror action, and to a redundant
destruction in other cases, since for error condition rule destruction
also takes care of resource destruction. In order to fix this state a
symmetry in behavior is added and resource destruction also takes care
of removing the resource from rule's resource list.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomlxsw: core_acl_flex_actions: Remove redundant mirror resource destruction
Nir Dotan [Fri, 3 Aug 2018 12:57:44 +0000 (15:57 +0300)]
mlxsw: core_acl_flex_actions: Remove redundant mirror resource destruction

In previous patch mlxsw_afa_resource_del() was added to avoid a duplicate
resource detruction scenario.
For mirror actions, such duplicate destruction leads to a crash as in:

 # tc qdisc add dev swp49 ingress
 # tc filter add dev swp49 parent ffff: \
   protocol ip chain 100 pref 10 \
   flower skip_sw dst_ip 192.168.101.1 action drop
 # tc filter add dev swp49 parent ffff: \
   protocol ip pref 10 \
   flower skip_sw dst_ip 192.168.101.1 action goto chain 100 \
   action mirred egress mirror dev swp4

Therefore add a call to mlxsw_afa_resource_del() in
mlxsw_afa_mirror_destroy() in order to clear that resource
from rule's resources.

Fixes: d0d13c1858a1 ("mlxsw: spectrum_acl: Add support for mirror action")
Signed-off-by: Nir Dotan <nird@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomlxsw: core_acl_flex_actions: Remove redundant counter destruction
Nir Dotan [Fri, 3 Aug 2018 12:57:43 +0000 (15:57 +0300)]
mlxsw: core_acl_flex_actions: Remove redundant counter destruction

Each tc flower rule uses a hidden count action. As counter resource may
not be available due to limited HW resources, update _counter_create()
and _counter_destroy() pair to follow previously introduced symmetric
error condition handling, add a call to mlxsw_afa_resource_del() as part
of the counter resource destruction.

Fixes: c18c1e186ba8 ("mlxsw: core: Make counter index allocated inside the action append")
Signed-off-by: Nir Dotan <nird@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomlxsw: core_acl_flex_actions: Remove redundant resource destruction
Nir Dotan [Fri, 3 Aug 2018 12:57:42 +0000 (15:57 +0300)]
mlxsw: core_acl_flex_actions: Remove redundant resource destruction

Some ACL actions require the allocation of a separate resource
prior to applying the action itself. When facing an error condition
during the setup phase of the action, resource should be destroyed.
For such actions the destruction was done twice which is dangerous
and lead to a potential crash.
The destruction took place first upon error on action setup phase
and then as the rule was destroyed.

The following sequence generated a crash:

 # tc qdisc add dev swp49 ingress
 # tc filter add dev swp49 parent ffff: \
   protocol ip chain 100 pref 10 \
   flower skip_sw dst_ip 192.168.101.1 action drop
 # tc filter add dev swp49 parent ffff: \
   protocol ip pref 10 \
   flower skip_sw dst_ip 192.168.101.1 action goto chain 100 \
   action mirred egress mirror dev swp4

Therefore add mlxsw_afa_resource_del() as a complement of
mlxsw_afa_resource_add() to add symmetry to resource_list membership
handling. Call this from mlxsw_afa_fwd_entry_ref_destroy() to make the
_fwd_entry_ref_create() and _fwd_entry_ref_destroy() pair of calls a
NOP.

Fixes: 140ce421217e ("mlxsw: core: Convert fwd_entry_ref list to be generic per-block resource list")
Signed-off-by: Nir Dotan <nird@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agomlxsw: core_acl_flex_actions: Return error for conflicting actions
Nir Dotan [Fri, 3 Aug 2018 12:57:41 +0000 (15:57 +0300)]
mlxsw: core_acl_flex_actions: Return error for conflicting actions

Spectrum switch ACL action set is built in groups of three actions
which may point to additional actions. A group holds a single record
which can be set as goto record for pointing at a following group
or can be set to mark the termination of the lookup. This is perfectly
adequate for handling a series of actions to be executed on a packet.
While the SW model allows configuration of conflicting actions
where it is clear that some actions will never execute, the mlxsw
driver must block such configurations as it creates a conflict
over the single terminate/goto record value.

For a conflicting actions configuration such as:

 # tc filter add dev swp49 parent ffff: \
   protocol ip pref 10 \
   flower skip_sw dst_ip 192.168.101.1 \
   action goto chain 100 \
   action mirred egress mirror dev swp4

Where it is clear that the last action will never execute, the
mlxsw driver was issuing a warning instead of returning an error.
Therefore replace that warning with an error for this specific
case.

Fixes: 4cda7d8d7098 ("mlxsw: core: Introduce flexible actions support")
Signed-off-by: Nir Dotan <nird@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Linus Torvalds [Fri, 3 Aug 2018 17:49:47 +0000 (10:49 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Pull rdma fix from Jason Gunthorpe:
 "One bug for missing user input validation: refuse invalid port numbers
  in the modify_qp system call"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/uverbs: Expand primary and alt AV port checks

3 years agoMerge tag 'for-linus-20180803' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 3 Aug 2018 17:43:56 +0000 (10:43 -0700)]
Merge tag 'for-linus-20180803' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Just a single fix, from Ming, fixing a regression in this cycle where
  the busy tag iteration was changed to only calling the callback
  function for requests that are started. We really want all non-free
  requests.

  This fixes a boot regression on certain VM setups"

* tag 'for-linus-20180803' of git://git.kernel.dk/linux-block:
  blk-mq: fix blk_mq_tagset_busy_iter

3 years agoMerge tag 'nfs-for-4.18-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Fri, 3 Aug 2018 17:42:01 +0000 (10:42 -0700)]
Merge tag 'nfs-for-4.18-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfix from Trond Myklebust:
 "Fix a NFSv4 file locking regression"

* tag 'nfs-for-4.18-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Fix _nfs4_do_setlk()

3 years agoMerge tag 'powerpc-4.18-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 3 Aug 2018 17:38:21 +0000 (10:38 -0700)]
Merge tag 'powerpc-4.18-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "One fix for a regression in a recent TLB flush optimisation, which
  caused us to incorrectly not send TLB invalidations to coprocessors.

  Thanks to Frederic Barrat, Nicholas Piggin, Vaibhav Jain"

* tag 'powerpc-4.18-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s/radix: Fix missing global invalidations when removing copro

3 years agoMerge tag 'drm-fixes-2018-08-03' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 3 Aug 2018 17:16:03 +0000 (10:16 -0700)]
Merge tag 'drm-fixes-2018-08-03' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Nothing too major at this late stage:

   - adv7511: reset fix

   - vc4: scaling fix

   - two atomic core fixes

   - one legacy core error handling fix

  I had a bunch of driver fixes from hdlcd but I think I'll leave them
  for -next at this point"

* tag 'drm-fixes-2018-08-03' of git://anongit.freedesktop.org/drm/drm:
  drm/vc4: Reset ->{x, y}_scaling[1] when dealing with uniplanar formats
  drm/atomic: Initialize variables in drm_atomic_helper_async_check() to make gcc happy
  drm/atomic: Check old_plane_state->crtc in drm_atomic_helper_async_check()
  drm: re-enable error handling
  drm/bridge: adv7511: Reset registers on hotplug

3 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Fri, 3 Aug 2018 17:09:45 +0000 (10:09 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "Fix a memory corruption in the padlock-aes driver"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: padlock-aes - Fix Nano workaround data corruption

3 years agonohz: Fix missing tick reprogram when interrupting an inline softirq
Frederic Weisbecker [Fri, 3 Aug 2018 13:31:34 +0000 (15:31 +0200)]
nohz: Fix missing tick reprogram when interrupting an inline softirq

The full nohz tick is reprogrammed in irq_exit() only if the exit is not in
a nesting interrupt. This stands as an optimization: whether a hardirq or a
softirq is interrupted, the tick is going to be reprogrammed when necessary
at the end of the inner interrupt, with even potential new updates on the
timer queue.

When soft interrupts are interrupted, it's assumed that they are executing
on the tail of an interrupt return. In that case tick_nohz_irq_exit() is
called after softirq processing to take care of the tick reprogramming.

But the assumption is wrong: softirqs can be processed inline as well, ie:
outside of an interrupt, like in a call to local_bh_enable() or from
ksoftirqd.

Inline softirqs don't reprogram the tick once they are done, as opposed to
interrupt tail softirq processing. So if a tick interrupts an inline
softirq processing, the next timer will neither be reprogrammed from the
interrupting tick's irq_exit() nor after the interrupted softirq
processing. This situation may leave the tick unprogrammed while timers are
armed.

To fix this, simply keep reprogramming the tick even if a softirq has been
interrupted. That can be optimized further, but for now correctness is more
important.

Note that new timers enqueued in nohz_full mode after a softirq gets
interrupted will still be handled just fine through self-IPIs triggered by
the timer code.

Reported-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: stable@vger.kernel.org # 4.14+
Link: https://lkml.kernel.org/r/1533303094-15855-1-git-send-email-frederic@kernel.org
3 years agogenirq: Make force irq threading setup more robust
Thomas Gleixner [Fri, 3 Aug 2018 12:44:59 +0000 (14:44 +0200)]
genirq: Make force irq threading setup more robust

The support of force threading interrupts which are set up with both a
primary and a threaded handler wreckaged the setup of regular requested
threaded interrupts (primary handler == NULL).

The reason is that it does not check whether the primary handler is set to
the default handler which wakes the handler thread. Instead it replaces the
thread handler with the primary handler as it would do with force threaded
interrupts which have been requested via request_irq(). So both the primary
and the thread handler become the same which then triggers the warnon that
the thread handler tries to wakeup a not configured secondary thread.

Fortunately this only happens when the driver omits the IRQF_ONESHOT flag
when requesting the threaded interrupt, which is normaly caught by the
sanity checks when force irq threading is disabled.

Fix it by skipping the force threading setup when a regular threaded
interrupt is requested. As a consequence the interrupt request which lacks
the IRQ_ONESHOT flag is rejected correctly instead of silently wreckaging
it.

Fixes: 2a1d3ab8986d ("genirq: Handle force threading of irqs with primary and thread handler")
Reported-by: Kurt Kanzenbach <kurt.kanzenbach@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kurt Kanzenbach <kurt.kanzenbach@linutronix.de>
Cc: stable@vger.kernel.org
3 years agoselftests/bpf: update test_lwt_seg6local.sh according to iproute2
Mathieu Xhonneux [Wed, 1 Aug 2018 15:34:54 +0000 (15:34 +0000)]
selftests/bpf: update test_lwt_seg6local.sh according to iproute2

The shell file for test_lwt_seg6local contains an early iproute2 syntax
for installing a seg6local End.BPF route. iproute2 support for this
feature has recently been upstreamed, but with an additional keyword
required. This patch updates test_lwt_seg6local.sh to the definitive
iproute2 syntax

Signed-off-by: Mathieu Xhonneux <m.xhonneux@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
3 years agoMerge tag 'media/v4.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Thu, 2 Aug 2018 23:55:42 +0000 (16:55 -0700)]
Merge tag 'media/v4.18-3' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

 - a deadlock regression at vsp1 driver

 - some Remote Controller fixes related to the new BPF filter logic
   added on it for Kernel 4.18.

* tag 'media/v4.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: v4l: vsp1: Fix deadlock in VSPDL DRM pipelines
  media: rc: read out of bounds if bpf reports high protocol number
  media: bpf: ensure bpf program is freed on detach
  media: rc: be less noisy when driver misbehaves

3 years agoMerge tag 'arc-4.18-final' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Linus Torvalds [Thu, 2 Aug 2018 23:52:50 +0000 (16:52 -0700)]
Merge tag 'arc-4.18-final' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:
 "Another batch of fixes for ARC, this time mainly DMA API rework
  wreckage:

   - Fix software managed DMA wreckage after rework in 4.17 [Euginey]
      * missing cache flush
      * SMP_CACHE_BYTES vs cache_line_size

   - Fix allmodconfig build errors [Randy]

   - Maintainer update for Mellanox (EZChip) NPS platform"

* tag 'arc-4.18-final' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  arc: fix type warnings in arc/mm/cache.c
  arc: fix build errors in arc/include/asm/delay.h
  arc: [plat-eznps] fix printk warning in arc/plat-eznps/mtm.c
  arc: [plat-eznps] fix data type errors in platform headers
  ARC: [plat-eznps] Add missing struct nps_host_reg_aux_dpc
  ARC: add SMP_CACHE_BYTES value validate
  ARC: dma [non-IOC] setup SMP_CACHE_BYTES and cache_line_size
  ARC: dma [non IOC]: fix arc_dma_sync_single_for_(device|cpu)
  ARC: Add Ofer Levi as plat-eznps maintainer

3 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Thu, 2 Aug 2018 23:41:59 +0000 (16:41 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "3 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  userfaultfd: remove uffd flags from vma->vm_flags if UFFD_EVENT_FORK fails
  ipc/shm.c add ->pagesize function to shm_vm_ops
  memcg: remove memcg_cgroup::id from IDR on mem_cgroup_css_alloc() failure

3 years agouserfaultfd: remove uffd flags from vma->vm_flags if UFFD_EVENT_FORK fails
Mike Rapoport [Thu, 2 Aug 2018 22:36:09 +0000 (15:36 -0700)]
userfaultfd: remove uffd flags from vma->vm_flags if UFFD_EVENT_FORK fails

The fix in commit 0cbb4b4f4c44 ("userfaultfd: clear the
vma->vm_userfaultfd_ctx if UFFD_EVENT_FORK fails") cleared the
vma->vm_userfaultfd_ctx but kept userfaultfd flags in vma->vm_flags
that were copied from the parent process VMA.

As the result, there is an inconsistency between the values of
vma->vm_userfaultfd_ctx.ctx and vma->vm_flags which triggers BUG_ON
in userfaultfd_release().

Clearing the uffd flags from vma->vm_flags in case of UFFD_EVENT_FORK
failure resolves the issue.

Link: http://lkml.kernel.org/r/1532931975-25473-1-git-send-email-rppt@linux.vnet.ibm.com
Fixes: 0cbb4b4f4c44 ("userfaultfd: clear the vma->vm_userfaultfd_ctx if UFFD_EVENT_FORK fails")
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Reported-by: syzbot+121be635a7a35ddb7dcb@syzkaller.appspotmail.com
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Eric Biggers <ebiggers3@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoipc/shm.c add ->pagesize function to shm_vm_ops
Jane Chu [Thu, 2 Aug 2018 22:36:05 +0000 (15:36 -0700)]
ipc/shm.c add ->pagesize function to shm_vm_ops

Commit 05ea88608d4e ("mm, hugetlbfs: introduce ->pagesize() to
vm_operations_struct") adds a new ->pagesize() function to
hugetlb_vm_ops, intended to cover all hugetlbfs backed files.

With System V shared memory model, if "huge page" is specified, the
"shared memory" is backed by hugetlbfs files, but the mappings initiated
via shmget/shmat have their original vm_ops overwritten with shm_vm_ops,
so we need to add a ->pagesize function to shm_vm_ops.  Otherwise,
vma_kernel_pagesize() returns PAGE_SIZE given a hugetlbfs backed vma,
result in below BUG:

  fs/hugetlbfs/inode.c
        443             if (unlikely(page_mapped(page))) {
        444                     BUG_ON(truncate_op);

resulting in

  hugetlbfs: oracle (4592): Using mlock ulimits for SHM_HUGETLB is deprecated
  ------------[ cut here ]------------
  kernel BUG at fs/hugetlbfs/inode.c:444!
  Modules linked in: nfsv3 rpcsec_gss_krb5 nfsv4 ...
  CPU: 35 PID: 5583 Comm: oracle_5583_sbt Not tainted 4.14.35-1829.el7uek.x86_64 #2
  RIP: 0010:remove_inode_hugepages+0x3db/0x3e2
  ....
  Call Trace:
    hugetlbfs_evict_inode+0x1e/0x3e
    evict+0xdb/0x1af
    iput+0x1a2/0x1f7
    dentry_unlink_inode+0xc6/0xf0
    __dentry_kill+0xd8/0x18d
    dput+0x1b5/0x1ed
    __fput+0x18b/0x216
    ____fput+0xe/0x10
    task_work_run+0x90/0xa7
    exit_to_usermode_loop+0xdd/0x116
    do_syscall_64+0x187/0x1ae
    entry_SYSCALL_64_after_hwframe+0x150/0x0

[jane.chu@oracle.com: relocate comment]
Link: http://lkml.kernel.org/r/20180731044831.26036-1-jane.chu@oracle.com
Link: http://lkml.kernel.org/r/20180727211727.5020-1-jane.chu@oracle.com
Fixes: 05ea88608d4e13 ("mm, hugetlbfs: introduce ->pagesize() to vm_operations_struct")
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Suggested-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomemcg: remove memcg_cgroup::id from IDR on mem_cgroup_css_alloc() failure
Kirill Tkhai [Thu, 2 Aug 2018 22:36:01 +0000 (15:36 -0700)]
memcg: remove memcg_cgroup::id from IDR on mem_cgroup_css_alloc() failure

In case of memcg_online_kmem() failure, memcg_cgroup::id remains hashed
in mem_cgroup_idr even after memcg memory is freed.  This leads to leak
of ID in mem_cgroup_idr.

This patch adds removal into mem_cgroup_css_alloc(), which fixes the
problem.  For better readability, it adds a generic helper which is used
in mem_cgroup_alloc() and mem_cgroup_id_put_many() as well.

Link: http://lkml.kernel.org/r/152354470916.22460.14397070748001974638.stgit@localhost.localdomain
Fixes 73f576c04b94 ("mm: memcontrol: fix cgroup creation failure after many small jobs")
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov.dev@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>
3 years agodrivers: net: lmc: fix case value for target abort error
Colin Ian King [Wed, 1 Aug 2018 17:22:41 +0000 (18:22 +0100)]
drivers: net: lmc: fix case value for target abort error

Current value for a target abort error is 0x010, however, this value
should in fact be 0x002.  As it stands, the range of error is 0..7 so
it is currently never being detected.  This bug has been in the driver
since the early 2.6.12 days (or before).

Detected by CoverityScan, CID#744290 ("Logically dead code")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoblk-mq: fix blk_mq_tagset_busy_iter
Ming Lei [Thu, 2 Aug 2018 17:49:37 +0000 (01:49 +0800)]
blk-mq: fix blk_mq_tagset_busy_iter

Commit d250bf4e776ff09d5("blk-mq: only iterate over inflight requests
in blk_mq_tagset_busy_iter") uses 'blk_mq_rq_state(rq) == MQ_RQ_IN_FLIGHT'
to replace 'blk_mq_request_started(req)', this way is wrong, and causes
lots of test system hang during booting.

Fix the issue by using blk_mq_request_started(req) inside bt_tags_iter().

Fixes: d250bf4e776ff09d5 ("blk-mq: only iterate over inflight requests in blk_mq_tagset_busy_iter")
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Mark Brown <broonie@kernel.org>
Cc: Matt Hart <matthew.hart@linaro.org>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: John Garry <john.garry@huawei.com>
Cc: Hannes Reinecke <hare@suse.com>,
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: linux-scsi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reported-by: Mark Brown <broonie@kernel.org>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
3 years agofs: fix iomap_bmap position calculation
Eric Sandeen [Thu, 2 Aug 2018 20:09:27 +0000 (13:09 -0700)]
fs: fix iomap_bmap position calculation

The position calculation in iomap_bmap() shifts bno the wrong way,
so we don't progress properly and end up re-mapping block zero
over and over, yielding an unchanging physical block range as the
logical block advances:

# filefrag -Be file
 ext:   logical_offset:     physical_offset: length:   expected: flags:
   0:      0..       0:      21..        21:      1:             merged
   1:      1..       1:      21..        21:      1:         22: merged
Discontinuity: Block 1 is at 21 (was 22)
   2:      2..       2:      21..        21:      1:         22: merged
Discontinuity: Block 2 is at 21 (was 22)
   3:      3..       3:      21..        21:      1:         22: merged

This breaks the FIBMAP interface for anyone using it (XFS), which
in turn breaks LILO, zipl, etc.

Bug-actually-spotted-by: Darrick J. Wong <darrick.wong@oracle.com>
Fixes: 89eb1906a953 ("iomap: add an iomap-based bmap implementation")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
3 years agoMerge tag 'pci-v4.18-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Thu, 2 Aug 2018 17:59:19 +0000 (10:59 -0700)]
Merge tag 'pci-v4.18-fixes-5' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Fix integer overflow in new mobiveil driver (Dan Carpenter)

 - Fix race during NVMe removal/rescan (Hari Vyas)

* tag 'pci-v4.18-fixes-5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Fix is_added/is_busmaster race condition
  PCI: mobiveil: Avoid integer overflow in IB_WIN_SIZE

3 years agoselftest/net: fix protocol family to work for IPv4.
Maninder Singh [Thu, 2 Aug 2018 09:57:27 +0000 (15:27 +0530)]
selftest/net: fix protocol family to work for IPv4.

use actual protocol family passed by user rather than hardcoded
AF_INTE6 to cerate sockets.
current code is not working for IPv4.

Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Vaneet Narang <v.narang@samsung.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Thu, 2 Aug 2018 17:21:49 +0000 (10:21 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 regression fix from Will Deacon:
 "Ard found a nasty arm64 regression in 4.18 where the AES ghash/gcm
  code doesn't notify the kernel about its use of the vector registers,
  therefore potentially corrupting live user state.

  The fix is straightforward and Herbert agreed for it to go via arm64"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  crypto/arm64: aes-ce-gcm - add missing kernel_neon_begin/end pair

3 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 2 Aug 2018 17:12:02 +0000 (10:12 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:
 "Fixes keep trickling in:

  1) Various IP fragmentation memory limit hardening changes from Eric
     Dumazet.

  2) Revert ipv6 metrics leak change, it causes more problems than it
     fixes for now.

  3) Fix WoL regression in stmmac driver, from Jose Abreu.

  4) Netlink socket spectre v1 gadget fix, from Jeremy Cline"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  Revert "net/ipv6: fix metrics leak"
  rxrpc: Fix user call ID check in rxrpc_service_prealloc_one
  net: dsa: Do not suspend/resume closed slave_dev
  netlink: Fix spectre v1 gadget in netlink_create()
  Documentation: dpaa2: Use correct heading adornment
  net: stmmac: Fix WoL for PCI-based setups
  bonding: avoid lockdep confusion in bond_get_stats()
  enic: do not call enic_change_mtu in enic_probe
  ipv4: frags: handle possible skb truesize change
  inet: frag: enforce memory limits earlier
  net/mlx5e: IPoIB, Set the netdevice sw mtu in ipoib enhanced flow
  net/mlx5e: Fix null pointer access when setting MTU of vport representor
  net/mlx5e: Set port trust mode to PCP as default
  net/mlx5e: E-Switch, Initialize eswitch only if eswitch manager
  net: dsa: mv88e6xxx: Fix SERDES support on 88E6141/6341
  brcmfmac: fix regression in parsing NVRAM for multiple devices
  iwlwifi: add more card IDs for 9000 series

3 years agoSquashfs: Compute expected length from inode size rather than block length
Phillip Lougher [Thu, 2 Aug 2018 15:45:15 +0000 (16:45 +0100)]
Squashfs: Compute expected length from inode size rather than block length

Previously in squashfs_readpage() when copying data into the page
cache, it used the length of the datablock read from the filesystem
(after decompression).  However, if the filesystem has been corrupted
this data block may be short, which will leave pages unfilled.

The fix for this is to compute the expected number of bytes to copy
from the inode size, and use this to detect if the block is short.

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
Tested-by: Willy Tarreau <w@1wt.eu>
Cc: Анатолий Тросиненко <anatoly.trosinenko@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agosquashfs: more metadata hardening
Linus Torvalds [Thu, 2 Aug 2018 15:43:35 +0000 (08:43 -0700)]
squashfs: more metadata hardening

The squashfs fragment reading code doesn't actually verify that the
fragment is inside the fragment table.  The end result _is_ verified to
be inside the image when actually reading the fragment data, but before
that is done, we may end up taking a page fault because the fragment
table itself might not even exist.

Another report from Anatoly and his endless squashfs image fuzzing.

Reported-by: Анатолий Тросиненко <anatoly.trosinenko@gmail.com>
Acked-by:: Phillip Lougher <phillip.lougher@gmail.com>,
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agox86/boot/compressed/64: Validate trampoline placement against E820
Kirill A. Shutemov [Wed, 1 Aug 2018 13:32:25 +0000 (16:32 +0300)]
x86/boot/compressed/64: Validate trampoline placement against E820

There were two report of boot failure cased by trampoline placed into
a reserved memory region. It can happen on machines that don't report
EBDA correctly.

Fix the problem by re-validating the found address against the E820 table.
If the address is in a reserved area, find the next usable region below the
initial address.

Fixes: 3548e131ec6a ("x86/boot/compressed/64: Find a place for 32-bit trampoline")
Reported-by: Dmitry Malkin <d.malkin@real-time-systems.com>
Reported-by: youling 257 <youling257@gmail.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/20180801133225.38121-1-kirill.shutemov@linux.intel.com
3 years agoRevert "net/ipv6: fix metrics leak"
David S. Miller [Thu, 2 Aug 2018 04:32:30 +0000 (21:32 -0700)]
Revert "net/ipv6: fix metrics leak"

This reverts commit df18b50448fab1dff093731dfd0e25e77e1afcd1.

This change causes other problems and use-after-free situations as
found by syzbot.

Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoNFSv4: Fix _nfs4_do_setlk()
Trond Myklebust [Mon, 30 Jul 2018 02:21:22 +0000 (22:21 -0400)]
NFSv4: Fix _nfs4_do_setlk()

The patch to fix the case where a lock request was interrupted ended up
changing default handling of errors such as NFS4ERR_DENIED and caused the
client to immediately resend the lock request. Let's do a partial revert
of that request so that the default is now to exit, but change the way
we handle resends to take into account the fact that the user may have
interrupted the request.

Reported-by: Kenneth Johansson <ken@kenjo.org>
Fixes: a3cf9bca2ace ("NFSv4: Don't add a new lock on an interrupted wait..")
Cc: Benjamin Coddington <bcodding@redhat.com>
Cc: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
3 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Wed, 1 Aug 2018 22:01:26 +0000 (15:01 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fix from Russell King:
 "Just a single fix this time around for recent binutils causing build
  problems when generating Thumb-2 code"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8781/1: Fix Thumb-2 syscall return for binutils 2.29+

3 years agomm: do not initialize TLB stack vma's with vma_init()
Linus Torvalds [Wed, 1 Aug 2018 20:43:38 +0000 (13:43 -0700)]
mm: do not initialize TLB stack vma's with vma_init()

Commit 2c4541e24c55 ("mm: use vma_init() to initialize VMAs on stack and
data segments") tried to initialize various left-over ad-hoc vma's
"properly", but actually made things worse for the temporary vma's used
for TLB flushing.

vma_init() doesn't actually initialize all of the vma, just a few
fields, so doing something like

   -       struct vm_area_struct vma = { .vm_mm = tlb->mm, };
   +       struct vm_area_struct vma;
   +
   +       vma_init(&vma, tlb->mm);

was actually very bad: instead of having a nicely initialized vma with
every field but "vm_mm" zeroed, you'd have an entirely uninitialized vma
with only a couple of fields initialized.  And they weren't even fields
that the code in question mostly cared about.

The flush_tlb_range() function takes a "struct vma" rather than a
"struct mm_struct", because a few architectures actually care about what
kind of range it is - being able to only do an ITLB flush if it's a
range that doesn't have data accesses enabled, for example.  And all the
normal users already have the vma for doing the range invalidation.

But a few people want to call flush_tlb_range() with a range they just
made up, so they also end up using a made-up vma.  x86 just has a
special "flush_tlb_mm_range()" function for this, but other
architectures (arm and ia64) do the "use fake vma" thing instead, and
thus got caught up in the vma_init() changes.

At the same time, the TLB flushing code really doesn't care about most
other fields in the vma, so vma_init() is just unnecessary and
pointless.

This fixes things by having an explicit "this is just an initializer for
the TLB flush" initializer macro, which is used by the arm/arm64/ia64
people who mis-use this interface with just a dummy vma.

Fixes: 2c4541e24c55 ("mm: use vma_init() to initialize VMAs on stack and data segments")
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm: delete historical BUG from zap_pmd_range()
Hugh Dickins [Wed, 1 Aug 2018 18:31:52 +0000 (11:31 -0700)]
mm: delete historical BUG from zap_pmd_range()

Delete the old VM_BUG_ON_VMA() from zap_pmd_range(), which asserted
that mmap_sem must be held when splitting an "anonymous" vma there.
Whether that's still strictly true nowadays is not entirely clear,
but the danger of sometimes crashing on the BUG is now fairly clear.

Even with the new stricter rules for anonymous vma marking, the
condition it checks for can possible trigger. Commit 44960f2a7b63
("staging: ashmem: Fix SIGBUS crash when traversing mmaped ashmem
pages") is good, and originally I thought it was safe from that
VM_BUG_ON_VMA(), because the /dev/ashmem fd exposed to the user is
disconnected from the vm_file in the vma, and madvise(,,MADV_REMOVE)
insists on VM_SHARED.

But after I read John's earlier mail, drawing attention to the
vfs_fallocate() in there: I may be wrong, and I don't know if Android
has THP in the config anyway, but it looks to me like an
unmap_mapping_range() from ashmem's vfs_fallocate() could hit precisely
the VM_BUG_ON_VMA(), once it's vma_is_anonymous().

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agorxrpc: Fix user call ID check in rxrpc_service_prealloc_one
YueHaibing [Wed, 1 Aug 2018 12:27:23 +0000 (13:27 +0100)]
rxrpc: Fix user call ID check in rxrpc_service_prealloc_one

There just check the user call ID isn't already in use, hence should
compare user_call_ID with xcall->user_call_ID, which is current
node's user_call_ID.

Fixes: 540b1c48c37a ("rxrpc: Fix deadlock between call creation and sendmsg/recvmsg")
Suggested-by: David Howells <dhowells@redhat.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
3 years agoMerge tag 'mmc-v4.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Wed, 1 Aug 2018 18:43:13 +0000 (11:43 -0700)]
Merge tag 'mmc-v4.18-rc5' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fix from Ulf Hansson:
 "MMC host: mxcmmc: Fix build error for powerpc"

* tag 'mmc-v4.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: mxcmmc: Fix missing parentheses and brace

3 years agoMerge tag 'pm-urgent-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Wed, 1 Aug 2018 18:35:12 +0000 (11:35 -0700)]
Merge tag 'pm-urgent-4.18' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix the scope of a recent intel_pstate driver optimization used
  incorrectly on some systems due to processor identification ambiguity
  and fix a few issues in the turbostat utility, including three recent
  regressions.

  Specifics:

   - Use ACPI FADT preferred PM Profile to distinguish Skylake desktop
     processors from some server ones with the same model number in
     order to limit the scope of the recent IO-wait boost optimization
     to servers, as intended (Srinivas Pandruvada).

   - Fix several issues in the turbostat utility:
      * Fix the -S option on 1-CPU systems (Len Brown).
      * Fix computations using incorrect processor core counts (Artem
        Bityutskiy).
      * Fix the x2apic debug message (Len Brown).
      * Fix logical node enumeration to allow for non-sequential
        physical nodes (Prarit Bhargava).
      * Fix reported family on modern AMD processors (Calvin Walton).
      * Clarify the RAPL column information in the man page (Len Brown)"

* tag 'pm-urgent-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: intel_pstate: Limit the scope of HWP dynamic boost platforms
  tools/power turbostat: version 18.07.27
  tools/power turbostat: Read extended processor family from CPUID
  tools/power turbostat: Fix logical node enumeration to allow for non-sequential physical nodes
  tools/power turbostat: fix x2apic debug message output file
  tools/power turbostat: fix bogus summary values
  tools/power turbostat: fix -S on UP systems
  tools/power turbostat: Update turbostat(8) RAPL throttling column description

3 years agosquashfs metadata 2: electric boogaloo
Linus Torvalds [Wed, 1 Aug 2018 17:38:43 +0000 (10:38 -0700)]
squashfs metadata 2: electric boogaloo

Anatoly continues to find issues with fuzzed squashfs images.

This time, corrupt, missing, or undersized data for the page filling
wasn't checked for, because the squashfs_{copy,read}_cache() functions
did the squashfs_copy_data() call without checking the resulting data
size.

Which could result in the page cache pages being incompletely filled in,
and no error indication to the user space reading garbage data.

So make a helper function for the "fill in pages" case, because the
exact same incomplete sequence existed in two places.

[ I should have made a squashfs branch for these things, but I didn't
  intend to start doing them in the first place.

  My historical connection through cramfs is why I got into looking at
  these issues at all, and every time I (continue to) think it's a
  one-off.

  Because _this_ time is always the last time. Right?   - Linus ]

Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Tested-by: Willy Tarreau <w@1wt.eu>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Phillip Lougher <phillip@squashfs.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agostaging: ashmem: Fix SIGBUS crash when traversing mmaped ashmem pages
John Stultz [Tue, 31 Jul 2018 17:17:04 +0000 (10:17 -0700)]
staging: ashmem: Fix SIGBUS crash when traversing mmaped ashmem pages

Amit Pundir and Youling in parallel reported crashes with recent
mainline kernels running Android:

  F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
  F DEBUG   : Build fingerprint: 'Android/db410c32_only/db410c32_only:Q/OC-MR1/102:userdebug/test-key
  F DEBUG   : Revision: '0'
  F DEBUG   : ABI: 'arm'
  F DEBUG   : pid: 2261, tid: 2261, name: zygote  >>> zygote <<<
  F DEBUG   : signal 7 (SIGBUS), code 2 (BUS_ADRERR), fault addr 0xec00008
  ... <snip> ...
  F DEBUG   : backtrace:
  F DEBUG   :     #00 pc 00001c04  /system/lib/libc.so (memset+48)
  F DEBUG   :     #01 pc 0010c513  /system/lib/libart.so (create_mspace_with_base+82)
  F DEBUG   :     #02 pc 0015c601  /system/lib/libart.so (art::gc::space::DlMallocSpace::CreateMspace(void*, unsigned int, unsigned int)+40)
  F DEBUG   :     #03 pc 0015c3ed  /system/lib/libart.so (art::gc::space::DlMallocSpace::CreateFromMemMap(art::MemMap*, std::__1::basic_string<char, std::__ 1::char_traits<char>, std::__1::allocator<char>> const&, unsigned int, unsigned int, unsigned int, unsigned int, bool)+36)
  ...

This was bisected back to commit bfd40eaff5ab ("mm: fix
vma_is_anonymous() false-positives").

create_mspace_with_base() in the trace above, utilizes ashmem, and with
ashmem, for shared mappings we use shmem_zero_setup(), which sets the
vma->vm_ops to &shmem_vm_ops.  But for private ashmem mappings nothing
sets the vma->vm_ops.

Looking at the problematic patch, it seems to add a requirement that one
call vma_set_anonymous() on a vma, otherwise the dummy_vm_ops will be
used.  Using the dummy_vm_ops seem to triggger SIGBUS when traversing
unmapped pages.

Thus, this patch adds a call to vma_set_anonymous() for ashmem private
mappings and seems to avoid the reported problem.

Fixes: bfd40eaff5ab ("mm: fix vma_is_anonymous() false-positives")
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Colin Cross <ccross@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Reported-by: Amit Pundir <amit.pundir@linaro.org>
Reported-by: Youling 257 <youling257@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoia64: mark special ia64 memory areas anonymous
Linus Torvalds [Wed, 1 Aug 2018 16:57:50 +0000 (09:57 -0700)]
ia64: mark special ia64 memory areas anonymous

Commit bfd40eaff5ab ("mm: fix vma_is_anonymous() false-positives") made
newly allocated vma's have a dummy vm_ops field so that they wouldn't be
mistaken for anonymous mappings, and if you wanted an anonymous vma you
had to explicitly say so by calling "vma_set_anonymous()" on it.

However, it missed the two special vmas that ia64 processes have: the
register backing store and the NaT page.  So they wouldn't actually act
like anonymous ranges, and page faults on them caused a SIGBUS rather
than the creation of a new anon page in them.

That obviously will make any ia64 binary very unhappy indeed, and the
boot fails early.

Fixes: bfd40eaff5ab ("mm: fix vma_is_anonymous() false-positives")
Reported-by: Tony Luck <tony.luck@intel.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>