list_del corruption. prev->next should be ffff8881398591a0, but was ffff888139859800
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:61!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4271 Comm: syz.0.1161 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__list_del_entry_valid+0x10c/0x120 lib/list_debug.c:59
Code: 48 89 de e8 16 54 57 02 0f 0b 48 c7 c7 c0 99 63 85 48 89 de e8 05 54 57 02 0f 0b 48 c7 c7 20 9a 63 85 48 89 de e8 f4 53 57 02 <0f> 0b 48 c7 c7 80 9a 63 85 48 89 de e8 e3 53 57 02 0f 0b 00 55 48
RSP: 0018:ffffc90000d77818 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffff8881398591a0 RCX: 09675d394d6eec00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90000d77838 R08: ffff8881f7032eff R09: 1ffff1103ee065df
R10: dffffc0000000000 R11: ffffed103ee065e0 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888139859800 R15: ffff888109821920
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000b44000 CR3: 000000010d716000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:139 [inline]
 dentry_unlist fs/dcache.c:529 [inline]
 __dentry_kill+0x248/0x660 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+0x1af/0x210 fs/incfs/vfs.c:1999
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x44f/0x500 fs/namespace.c:1149
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1156
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xb70/0x29a0 kernel/exit.c:896
 do_group_exit+0x149/0x310 kernel/exit.c:1010
 get_signal+0x64f/0x1430 kernel/signal.c:2920
 arch_do_signal_or_restart+0xe2/0x1100 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:157 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:217
 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:310
 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:280
RIP: 0033:0x7f5f49e28159
Code: Unable to access opcode bytes at RIP 0x7f5f49e2812f.
RSP: 002b:00007f5f4885ffd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: 0000000000000000 RBX: 00007f5f4a0b0090 RCX: 00007f5f49e28159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5f49ebf06b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5f4a0b0128 R14: 00007f5f4a0b0090 R15: 00007ffe52d7adc8
 </TASK>
Modules linked in:
---[ end trace 3ac6f25912489287 ]---
RIP: 0010:__list_del_entry_valid+0x10c/0x120 lib/list_debug.c:59
Code: 48 89 de e8 16 54 57 02 0f 0b 48 c7 c7 c0 99 63 85 48 89 de e8 05 54 57 02 0f 0b 48 c7 c7 20 9a 63 85 48 89 de e8 f4 53 57 02 <0f> 0b 48 c7 c7 80 9a 63 85 48 89 de e8 e3 53 57 02 0f 0b 00 55 48
RSP: 0018:ffffc90000d77818 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffff8881398591a0 RCX: 09675d394d6eec00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90000d77838 R08: ffff8881f7032eff R09: 1ffff1103ee065df
R10: dffffc0000000000 R11: ffffed103ee065e0 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888139859800 R15: ffff888109821920
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000b44000 CR3: 000000010d716000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400