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WARNING: CPU: 1 PID: 9903 at lib/percpu-refcount.c:111 percpu_ref_exit+0xab/0xd0 lib/percpu-refcount.c:111
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9903 Comm: syz-executor.1 Not tainted 5.5.0-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+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:percpu_ref_exit+0xab/0xd0 lib/percpu-refcount.c:111
Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 1d 48 c7 43 08 03 00 00 00 e8 41 84 d4 fd 5b 41 5c 41 5d 5d c3 e8 35 84 d4 fd <0f> 0b eb bf 4c 89 ef e8 99 27 13 fe eb d9 e8 f2 26 13 fe eb a7 4c
RSP: 0018:ffffc900069d7d10 EFLAGS: 00010293
RAX: ffff8880a7d96100 RBX: ffff888098eb7010 RCX: ffffffff83a0f2a2
RDX: 0000000000000000 RSI: ffffffff83a0f30b RDI: ffff888098eb7028
RBP: ffffc900069d7d28 R08: ffff8880a7d96100 R09: ffffed10131d6e0a
R10: ffffed10131d6e09 R11: ffff888098eb704f R12: 0000607f514bc478
R13: ffff888098eb7018 R14: ffff8880a3886000 R15: ffff8880a38862a8
 io_sqe_files_unregister+0x8f/0x2f0 fs/io_uring.c:5269
 io_ring_ctx_free fs/io_uring.c:6265 [inline]
 io_ring_ctx_wait_and_kill+0x4ed/0xa60 fs/io_uring.c:6356
 io_uring_release+0x42/0x50 fs/io_uring.c:6364
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x316/0x380 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+0x676/0x790 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x414f31
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:00007ffec44a8930 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000414f31
RDX: 0000001b32620000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000001 R08: ffffffffffffffff R09: ffffffffffffffff
R10: 00007ffec44a8a10 R11: 0000000000000293 R12: 000000000075c9a0
R13: 000000000075c9a0 R14: 0000000000760ad8 R15: 000000000075bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..