syzbot

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