tpm: Add !tpm_amd_is_rng_defective() to the hwrng_unregister() call site
The following crash was reported:
[ 1950.279393] list_del corruption,
ffff99560d485790->next is NULL
[ 1950.279400] ------------[ cut here ]------------
[ 1950.279401] kernel BUG at lib/list_debug.c:49!
[ 1950.279405] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[ 1950.279407] CPU: 11 PID: 5886 Comm: modprobe Tainted: G O 6.2.8_1 #1
[ 1950.279409] Hardware name: Gigabyte Technology Co., Ltd. B550M AORUS PRO-P/B550M AORUS PRO-P,
BIOS F15c 05/11/2022
[ 1950.279410] RIP: 0010:__list_del_entry_valid+0x59/0xc0
[ 1950.279415] Code: 48 8b 01 48 39 f8 75 5a 48 8b 72 08 48 39 c6 75 65 b8 01 00 00 00 c3 cc cc cc
cc 48 89 fe 48 c7 c7 08 a8 13 9e e8 b7 0a bc ff <0f> 0b 48 89 fe 48 c7 c7 38 a8 13 9e e8 a6 0a bc
ff 0f 0b 48 89 fe
[ 1950.279416] RSP: 0018:
ffffa96d05647e08 EFLAGS:
00010246
[ 1950.279418] RAX:
0000000000000033 RBX:
ffff99560d485750 RCX:
0000000000000000
[ 1950.279419] RDX:
0000000000000000 RSI:
ffffffff9e107c59 RDI:
00000000ffffffff
[ 1950.279420] RBP:
ffffffffc19c5168 R08:
0000000000000000 R09:
ffffa96d05647cc8
[ 1950.279421] R10:
0000000000000003 R11:
ffffffff9ea2a568 R12:
0000000000000000
[ 1950.279422] R13:
ffff99560140a2e0 R14:
ffff99560127d2e0 R15:
0000000000000000
[ 1950.279422] FS:
00007f67da795380(0000) GS:
ffff995d1f0c0000(0000) knlGS:
0000000000000000
[ 1950.279424] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
[ 1950.279424] CR2:
00007f67da7e65c0 CR3:
00000001feed2000 CR4:
0000000000750ee0
[ 1950.279426] PKRU:
55555554
[ 1950.279426] Call Trace:
[ 1950.279428] <TASK>
[ 1950.279430] hwrng_unregister+0x28/0xe0 [rng_core]
[ 1950.279436] tpm_chip_unregister+0xd5/0xf0 [tpm]
Add the forgotten !tpm_amd_is_rng_defective() invariant to the
hwrng_unregister() call site inside tpm_chip_unregister().
Cc: stable@vger.kernel.org
Reported-by: Martin Dimov <martin@dmarto.com>
Link: https://lore.kernel.org/linux-integrity/3d1d7e9dbfb8c96125bc93b6b58b90a7@dmarto.com/
Fixes: f1324bbc4011 ("tpm: disable hwrng for fTPM on some AMD designs")
Fixes: b006c439d58d ("hwrng: core - start hwrng kthread also for untrusted sources")
Tested-by: Martin Dimov <martin@dmarto.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>