syzbot

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kernel BUG at fs/namei.c:2786!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 288 Comm: syz-executor298 Not tainted 5.10.236-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:may_delete+0x755/0x760 fs/namei.c:2786
Code: 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c db fd ff ff 4c 89 ef e8 9c 50 f4 ff e9 ce fd ff ff e8 42 b2 b6 ff 0f 0b e8 3b b2 b6 ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8
RSP: 0018:ffffc90000987bb8 EFLAGS: 00010293
RAX: ffffffff81b40db5 RBX: ffff8881090fa7a0 RCX: ffff88811a4f93c0
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000987c38 R08: ffffffff81b406d3 R09: 0000000000000003
R10: fffff52000130f5c R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8881090fb000 R14: ffff88811bbff300 R15: dffffc0000000000
FS:  000055557ea7b380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560b9373bd38 CR3: 000000011ab5f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vfs_rmdir+0x2c/0x3f0 fs/namei.c:3833
 incfs_kill_sb+0x108/0x220 fs/incfs/vfs.c:1973
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1118
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125
 task_work_run+0x129/0x190 kernel/task_work.c:189
 ptrace_notify+0x29e/0x350 kernel/signal.c:2280
 ptrace_report_syscall include/linux/tracehook.h:66 [inline]
 tracehook_report_syscall_exit include/linux/tracehook.h:129 [inline]
 arch_syscall_exit_tracehook include/linux/entry-common.h:285 [inline]
 syscall_exit_work kernel/entry/common.c:239 [inline]
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:266 [inline]
 syscall_exit_to_user_mode+0xf5/0x1a0 kernel/entry/common.c:272
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f3f897fd447
Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcc2b281d8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3f897fd447
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcc2b28290
RBP: 00007ffcc2b28290 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffcc2b29380
R13: 000055557ea84700 R14: 0000000000000001 R15: 431bde82d7b634db
Modules linked in:
---[ end trace 690e836d07fabec6 ]---
RIP: 0010:may_delete+0x755/0x760 fs/namei.c:2786
Code: 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c db fd ff ff 4c 89 ef e8 9c 50 f4 ff e9 ce fd ff ff e8 42 b2 b6 ff 0f 0b e8 3b b2 b6 ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8
RSP: 0018:ffffc90000987bb8 EFLAGS: 00010293
RAX: ffffffff81b40db5 RBX: ffff8881090fa7a0 RCX: ffff88811a4f93c0
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000987c38 R08: ffffffff81b406d3 R09: 0000000000000003
R10: fffff52000130f5c R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8881090fb000 R14: ffff88811bbff300 R15: dffffc0000000000
FS:  000055557ea7b380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560b9373bd38 CR3: 000000011ab5f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400