------------[ cut here ]------------
WARNING: CPU: 3 PID: 6299 at fs/namespace.c:1258 cleanup_mnt+0x397/0x450 fs/namespace.c:1258
Modules linked in:
CPU: 3 PID: 6299 Comm: syz-executor.2 Not tainted 6.9.0-syzkaller-12333-g54f71b0369c9 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:cleanup_mnt+0x397/0x450 fs/namespace.c:1258
Code: 03 38 d0 7c 08 84 d2 0f 85 b1 00 00 00 c7 83 3c 01 00 00 00 00 00 00 48 89 df e8 f4 ee ff ff e9 34 fe ff ff e8 7a 4d 89 ff 90 <0f> 0b 90 e9 8e fc ff ff e8 6c 4d 89 ff 4c 89 ef e8 34 0c 07 00 e9
RSP: 0018:ffffc90003577af8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000012 RCX: ffffffff82052ca5
RDX: ffff88801fd04880 RSI: ffffffff82053016 RDI: 0000000000000005
RBP: ffff888042f5d000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000012 R11: 0000000000000000 R12: ffff88801fd051e8
R13: ffff888042f5d6c0 R14: ffffed1003fa0a3d R15: ffff888042f5d700
FS:  0000000000000000(0000) GS:ffff88802c300000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5f06b6c CR3: 000000005aa36000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 task_work_run+0x14e/0x250 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa9b/0x2ba0 kernel/exit.c:874
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023
 get_signal+0x25c3/0x2670 kernel/signal.c:2909
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf732e579
Code: Unable to access opcode bytes at 0xf732e54f.
RSP: 002b:00000000f5f205ac EFLAGS: 00000292 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 000000002000cffc RCX: 0000000000000000
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>