------------[ cut here ]------------
WARNING: CPU: 1 PID: 8273 at lib/percpu-refcount.c:111 percpu_ref_exit+0x81/0xa0 lib/percpu-refcount.c:115
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8273 Comm: syz-executor.1 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x12d/0x187 lib/dump_stack.c:118
 panic+0x22a/0x4e3 kernel/panic.c:221
 __warn.cold.10+0x25/0x2a kernel/panic.c:582
 report_bug+0x1b0/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:percpu_ref_exit+0x81/0xa0 lib/percpu-refcount.c:111
Code: 65 16 43 fe 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 24 48 c7 43 08 03 00 00 00 5b 41 5c 41 5d 5d c3 <0f> 0b eb ce e8 a6 7b 54 fe eb c0 4c 89 ef e8 9c 7b 54 fe eb 91 4c
RSP: 0018:ffffc90003327d20 EFLAGS: 00010282
RAX: dffffc0000000000 RBX: ffff888096385c10 RCX: 0000000000000000
RDX: 1ffff11012c70b85 RSI: 0000000000000006 RDI: ffff888096385c28
RBP: ffffc90003327d38 R08: 0000000000000006 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000607f5129c028
R13: ffff888096385c18 R14: ffff888096fd6800 R15: ffff888096fd6b90
 io_sqe_files_unregister+0x71/0x290 fs/io_uring.c:4404
 io_ring_ctx_free fs/io_uring.c:5356 [inline]
 io_ring_ctx_wait_and_kill+0x395/0x8d0 fs/io_uring.c:5425
 io_uring_release+0x3d/0x50 fs/io_uring.c:5433
 __fput+0x25a/0x770 fs/file_table.c:280
 ____fput+0x9/0x10 fs/file_table.c:313
 task_work_run+0x108/0x180 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x24e/0x2e0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x4ff/0x5f0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4144b1
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fffdc895380 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004144b1
RDX: 0000001b33b20000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff
R10: 00007fffdc895460 R11: 0000000000000293 R12: 000000000075bf20
R13: 000000000002d1a8 R14: 00000000007606d0 R15: 000000000075bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..