syzbot

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kernel BUG at fs/namei.c:2933!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 297 Comm: syz-executor104 Not tainted 5.15.167-syzkaller-02003-g5e4635681cf1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:may_delete+0x6eb/0x6f0 fs/namei.c:2933
Code: 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 7f fe ff ff 4c 89 e7 e8 06 71 f4 ff e9 72 fe ff ff e8 3c 1f b2 ff 0f 0b e8 35 1f b2 ff <0f> 0b 0f 1f 00 55 48 89 e5 41 56 53 48 89 fb e8 21 1f b2 ff 4c 8d
RSP: 0018:ffffc90000957bb0 EFLAGS: 00010293
RAX: ffffffff81be384b RBX: ffff88812445acf0 RCX: ffff8881233acf00
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000957c18 R08: ffffffff81be31df R09: 0000000000000003
R10: fffff5200012af58 R11: dffffc0000000001 R12: ffff88812445a550
R13: 1ffff1102488b4aa R14: ffff8881092a7638 R15: dffffc0000000000
FS:  000055555ea73380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555ea8c778 CR3: 0000000122e67000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_rmdir+0x32/0x470 fs/namei.c:4130
 incfs_kill_sb+0x113/0x230 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1143
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1150
 task_work_run+0x129/0x190 kernel/task_work.c:188
 ptrace_notify+0x29e/0x350 kernel/signal.c:2388
 ptrace_report_syscall include/linux/tracehook.h:66 [inline]
 tracehook_report_syscall_exit include/linux/tracehook.h:130 [inline]
 arch_syscall_exit_tracehook include/linux/entry-common.h:297 [inline]
 syscall_exit_work kernel/entry/common.c:262 [inline]
 syscall_exit_to_user_mode_prepare kernel/entry/common.c:289 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:294 [inline]
 syscall_exit_to_user_mode+0xa3/0x160 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc7bb1d1387
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:00007ffe8abde1b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc7bb1d1387
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe8abde270
RBP: 00007ffe8abde270 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffe8abdf360
R13: 000055555ea7c700 R14: 0000000000000001 R15: 431bde82d7b634db
 </TASK>
Modules linked in:
---[ end trace e75530e4d6ce436b ]---
RIP: 0010:may_delete+0x6eb/0x6f0 fs/namei.c:2933
Code: 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 7f fe ff ff 4c 89 e7 e8 06 71 f4 ff e9 72 fe ff ff e8 3c 1f b2 ff 0f 0b e8 35 1f b2 ff <0f> 0b 0f 1f 00 55 48 89 e5 41 56 53 48 89 fb e8 21 1f b2 ff 4c 8d
RSP: 0018:ffffc90000957bb0 EFLAGS: 00010293
RAX: ffffffff81be384b RBX: ffff88812445acf0 RCX: ffff8881233acf00
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: ffffc90000957c18 R08: ffffffff81be31df R09: 0000000000000003
R10: fffff5200012af58 R11: dffffc0000000001 R12: ffff88812445a550
R13: 1ffff1102488b4aa R14: ffff8881092a7638 R15: dffffc0000000000
FS:  000055555ea73380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555ea8c778 CR3: 0000000122e67000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400