BUG: corrupted list in list_lru_del

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: bbed346d5a96 Merge branch 'for-next/core' into for-kernelci
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=11ae7b7a880000
kernel config: https://syzkaller.appspot.com/x/.config?x=3a4a45d2d827c1e
dashboard link: https://syzkaller.appspot.com/bug?extid=e90c6ae6614eb20c66a5
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
CC: [ak...@linux-foundation.org linux-...@vger.kernel.org linu...@kvack.org]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e8e91bc79312/disk-bbed346d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c1cb3fb3b77e/vmlinux-bbed346d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e90c6a...@syzkaller.appspotmail.com

list_del corruption. prev->next should be ffff0000ca9dae60, but was c740000500000001. (prev=ffff0000fa0c5010)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:61!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 3204 Comm: syz-executor.3 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
lr : __list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
sp : ffff8000136a3a80
x29: ffff8000136a3a80 x28: ffff0000ca9dad48 x27: ffff80000d471e30
x26: 0000000000000000 x25: ffff0000f9fc7f80 x24: ffff0000fa0c5010
x23: 0000000000000000 x22: 0000000000000003 x21: ffff0001086b67f0
x20: ffff0000f9fc7f80 x19: ffff0000ca9dae60 x18: 00000000000000c0
x17: 20747562202c3036 x16: ffff80000db49158 x15: ffff00010aaf1a80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff00010aaf1a80
x11: ff808000081c0d5c x10: 0000000000000000 x9 : f046872a05487100
x8 : f046872a05487100 x7 : ffff80000819545c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001fefbecd0 x1 : 0000000000000003 x0 : 000000000000006d
Call trace:
__list_del_entry_valid+0xbc/0xd0 lib/list_debug.c:59
__list_del_entry include/linux/list.h:134 [inline]
list_del_init include/linux/list.h:206 [inline]
list_lru_del+0x12c/0x1b4 mm/list_lru.c:152
d_lru_del+0x148/0x1a8 fs/dcache.c:441
select_collect+0x78/0x1e4 fs/dcache.c:1565
d_walk+0x13c/0x55c fs/dcache.c:1386
shrink_dcache_parent+0x98/0x280 fs/dcache.c:1625
do_one_tree fs/dcache.c:1682 [inline]
shrink_dcache_for_umount+0x4c/0x140 fs/dcache.c:1699
generic_shutdown_super+0x30/0x190 fs/super.c:473
kill_block_super+0x30/0x78 fs/super.c:1427
deactivate_locked_super+0x70/0xe8 fs/super.c:332
deactivate_super+0xd0/0xd4 fs/super.c:363
cleanup_mnt+0x1f8/0x234 fs/namespace.c:1186
__cleanup_mnt+0x20/0x30 fs/namespace.c:1193
task_work_run+0xc4/0x14c kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Code: d001b460 91346000 aa0803e3 94a76157 (d4210000)
---[ end trace 0000000000000000 ]---


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.