hrtimer: interrupt took 50302 ns
UDF-fs: warning (device loop2): udf_fill_super: No partition found (1)
REISERFS (device loop1): checking transaction log (loop1)
F2FS-fs (loop4): Mounted with checkpoint version = 48b305e5
================================================
WARNING: lock held when returning to user space!
4.14.303-syzkaller #0 Not tainted
------------------------------------------------
syz-executor.4/9520 is leaving the kernel with locks still held!
1 lock held by syz-executor.4/9520:
 #0:  (sb_writers#14){.+.+}, at: [<ffffffff818e1fed>] sb_start_write include/linux/fs.h:1551 [inline]
 #0:  (sb_writers#14){.+.+}, at: [<ffffffff818e1fed>] mnt_want_write_file+0xfd/0x3b0 fs/namespace.c:497
REISERFS (device loop1): Using r5 hash to sort names
REISERFS (device loop1): using 3.5.x disk format
REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8051 at fs/namespace.c:1178 cleanup_mnt+0x222/0x2c0 fs/namespace.c:1178
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8051 Comm: syz-executor.4 Not tainted 4.14.303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967
RIP: 0010:cleanup_mnt+0x222/0x2c0 fs/namespace.c:1178
RSP: 0018:ffff88809fe8fe18 EFLAGS: 00010297
RAX: ffff88809d706500 RBX: dffffc0000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8a093ee0
RBP: 0000000000000008 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88809d706500 R12: ffff8880af48f800
R13: 0000000000000001 R14: 0000000000000007 R15: fffffbfff1412816
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fe891fba537
RSP: 002b:00007ffdb8075bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe891fba537
RDX: 00007ffdb8075c89 RSI: 000000000000000a RDI: 00007ffdb8075c80
RBP: 00007ffdb8075c80 R08: 00000000ffffffff R09: 00007ffdb8075a50
R10: 0000555555904903 R11: 0000000000000246 R12: 00007fe892013b24
R13: 00007ffdb8076d40 R14: 0000555555904810 R15: 00007ffdb8076d80
Kernel Offset: disabled
Rebooting in 86400 seconds..