[Android 5.15] BUG: corrupted list in __dentry_kill (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 00b50d06692d Merge 8368be8a5072 ("coresight: etm4x: Add co..
git tree: android13-5.15-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=14449d2a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=deffac0a782f1cb0
dashboard link: https://syzkaller.appspot.com/bug?extid=503ce1dbeb93ad221be6
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=166d905a580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13a06452580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e15cc4396286/disk-00b50d06.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/bc02335d0e47/vmlinux-00b50d06.xz
kernel image: https://storage.googleapis.com/syzbot-assets/85f3421c6737/bzImage-00b50d06.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+503ce1...@syzkaller.appspotmail.com

R10: 0000000001004040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3cc71b4fac R14: 00007f3cc71b4fa0 R15: 00007f3cc71b4fa0
</TASK>
---[ end trace 61a9363f79be82fa ]---
list_del corruption. prev->next should be ffff888120e8b2b0, but was ffff888120f09c40
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:61!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 429 Comm: syz.6.27 Tainted: G W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__list_del_entry_valid+0x10c/0x120 lib/list_debug.c:59
Code: 48 89 de e8 16 70 56 02 0f 0b 48 c7 c7 00 98 63 85 48 89 de e8 05 70 56 02 0f 0b 48 c7 c7 60 98 63 85 48 89 de e8 f4 6f 56 02 <0f> 0b 48 c7 c7 c0 98 63 85 48 89 de e8 e3 6f 56 02 0f 0b 00 55 48
RSP: 0018:ffffc90002f273b8 EFLAGS: 00010246

RAX: 0000000000000054 RBX: ffff888120e8b2b0 RCX: 60a5e4b3f5a91c00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90002f273d8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520005e4dd8 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888120f09c40 R15: ffff888120ea84d0
FS: 0000555590df6500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000012fcf0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__list_del_entry include/linux/list.h:132 [inline]
dentry_unlist fs/dcache.c:529 [inline]
__dentry_kill+0x24c/0x650 fs/dcache.c:582
dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
dput+0x47/0x90 fs/dcache.c:893
path_put+0x39/0x60 fs/namei.c:559
dentry_release+0x4f/0xa0 fs/incfs/vfs.c:1606
__dentry_kill+0x4b5/0x650 fs/dcache.c:591
dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
dput+0x47/0x90 fs/dcache.c:893
path_put+0x39/0x60 fs/namei.c:559
dentry_release+0x4f/0xa0 fs/incfs/vfs.c:1606
__dentry_kill+0x4b5/0x650 fs/dcache.c:591
dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
dput+0x47/0x90 fs/dcache.c:893
ovl_workdir_create+0x249/0x5c0 fs/overlayfs/super.c:810
ovl_make_workdir fs/overlayfs/super.c:1398 [inline]
ovl_get_workdir+0x386/0x1130 fs/overlayfs/super.c:1548
ovl_fill_super+0x18c2/0x2a20 fs/overlayfs/super.c:2104
mount_nodev+0x5c/0xf0 fs/super.c:1446
ovl_mount+0x2c/0x40 fs/overlayfs/super.c:2194
legacy_get_tree+0xed/0x190 fs/fs_context.c:611
vfs_get_tree+0x89/0x260 fs/super.c:1530
do_new_mount+0x25a/0xa20 fs/namespace.c:3034
path_mount+0x659/0xff0 fs/namespace.c:3364
do_mount fs/namespace.c:3377 [inline]
__do_sys_mount fs/namespace.c:3585 [inline]
__se_sys_mount+0x320/0x390 fs/namespace.c:3562
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3562
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3cc6f39eb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff1515a198 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3cc71b4fa0 RCX: 00007f3cc6f39eb9
RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000
RBP: 00007f3cc6fa7c1f R08: 0000200000000340 R09: 0000000000000000
R10: 0000000001004040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3cc71b4fac R14: 00007f3cc71b4fa0 R15: 00007f3cc71b4fa0
</TASK>
Modules linked in:
---[ end trace 61a9363f79be82fb ]---
RIP: 0010:__list_del_entry_valid+0x10c/0x120 lib/list_debug.c:59
Code: 48 89 de e8 16 70 56 02 0f 0b 48 c7 c7 00 98 63 85 48 89 de e8 05 70 56 02 0f 0b 48 c7 c7 60 98 63 85 48 89 de e8 f4 6f 56 02 <0f> 0b 48 c7 c7 c0 98 63 85 48 89 de e8 e3 6f 56 02 0f 0b 00 55 48
RSP: 0018:ffffc90002f273b8 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffff888120e8b2b0 RCX: 60a5e4b3f5a91c00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90002f273d8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520005e4dd8 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888120f09c40 R15: ffff888120ea84d0
FS: 0000555590df6500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000012fcf0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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