syzbot

---[ end trace 8f58aae134758d29 ]---
list_del corruption. prev->next should be ffff88810d3d1c40, but was ffff88810d3d1a20
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:61!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 282 Comm: syz-executor 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 56 d9 4f 02 0f 0b 48 c7 c7 80 4d 63 85 48 89 de e8 45 d9 4f 02 0f 0b 48 c7 c7 e0 4d 63 85 48 89 de e8 34 d9 4f 02 <0f> 0b 48 c7 c7 40 4e 63 85 48 89 de e8 23 d9 4f 02 0f 0b 00 55 48
RSP: 0018:ffffc90000a67ab8 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffff88810d3d1c40 RCX: 7e61646e3fbac000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90000a67ad8 R08: dffffc0000000000 R09: ffffed103ee265e8
R10: ffffed103ee265e8 R11: 1ffff1103ee265e7 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88810d3d1a20 R15: ffff88810d25ce60
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d4fe31f98 CR3: 000000011c372000 CR4: 00000000003526a0
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
 incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166
 incfs_kill_sb+0x1b8/0x220 fs/incfs/vfs.c:1997
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x446/0x500 fs/namespace.c:1148
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1155
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7e/0x27a0 kernel/exit.c:889
 do_group_exit+0x141/0x310 kernel/exit.c:1003
 __do_sys_exit_group kernel/exit.c:1014 [inline]
 __se_sys_exit_group kernel/exit.c:1012 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1012
 x64_sys_call+0x832/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f71a8673749
Code: Unable to access opcode bytes at RIP 0x7f71a867371f.
RSP: 002b:00007ffdbff61368 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f71a86f7ddd RCX: 00007f71a8673749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 00007ffdbff5f107 R09: 00007ffdbff62620
R10: 0000000000000009 R11: 0000000000000246 R12: 00007ffdbff62620
R13: 00007f71a86f7d7d R14: 0000555555de54a8 R15: 00007ffdbff636f0
 </TASK>
Modules linked in:
---[ end trace 8f58aae134758d2a ]---
RIP: 0010:__list_del_entry_valid+0x10c/0x120 lib/list_debug.c:59
Code: 48 89 de e8 56 d9 4f 02 0f 0b 48 c7 c7 80 4d 63 85 48 89 de e8 45 d9 4f 02 0f 0b 48 c7 c7 e0 4d 63 85 48 89 de e8 34 d9 4f 02 <0f> 0b 48 c7 c7 40 4e 63 85 48 89 de e8 23 d9 4f 02 0f 0b 00 55 48
RSP: 0018:ffffc90000a67ab8 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffff88810d3d1c40 RCX: 7e61646e3fbac000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90000a67ad8 R08: dffffc0000000000 R09: ffffed103ee265e8
R10: ffffed103ee265e8 R11: 1ffff1103ee265e7 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88810d3d1a20 R15: ffff88810d25ce60
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d4fe31f98 CR3: 000000011c372000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400