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WARNING: CPU: 1 PID: 9489 at lib/percpu-refcount.c:111 percpu_ref_exit+0xa7/0xb0 lib/percpu-refcount.c:111
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9489 Comm: syz-executor.0 Not tainted 5.6.0-rc7-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+0x1e9/0x30e lib/dump_stack.c:118
 panic+0x264/0x7a0 kernel/panic.c:221
 __warn+0x209/0x210 kernel/panic.c:582
 report_bug+0x1ac/0x2d0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:percpu_ref_exit+0xa7/0xb0 lib/percpu-refcount.c:111
Code: 25 00 00 74 08 4c 89 f7 e8 46 f1 1c fe 49 c7 06 03 00 00 00 eb 05 e8 f8 b1 e0 fd 5b 41 5c 41 5d 41 5e 41 5f c3 e8 e9 b1 e0 fd <0f> 0b eb c7 0f 1f 44 00 00 41 57 41 56 53 49 89 f6 48 89 fb e8 d0
RSP: 0018:ffffc90001687ac0 EFLAGS: 00010287
RAX: ffffffff8393f437 RBX: ffff888095b07018 RCX: 0000000000040000
RDX: ffffc90002312000 RSI: 0000000000000f08 RDI: 0000000000000f09
RBP: 0000000000000001 R08: ffffffff8393f3d7 R09: ffffed1025fff789
R10: ffffed1025fff789 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff11012b60e01 R14: ffff888095b07008 R15: 0000607f514b9268
 io_ring_ctx_free fs/io_uring.c:6384 [inline]
 io_ring_ctx_wait_and_kill+0x2e1b/0x31d0 fs/io_uring.c:6462
 io_uring_release+0x59/0x70 fs/io_uring.c:6470
 __fput+0x2d8/0x730 fs/file_table.c:280
 task_work_run+0x176/0x1b0 kernel/task_work.c:113
 get_signal+0x1cae/0x1d60 kernel/signal.c:2533
 do_signal+0x33/0x610 arch/x86/kernel/signal.c:813
 exit_to_usermode_loop arch/x86/entry/common.c:160 [inline]
 prepare_exit_to_usermode+0x32a/0x600 arch/x86/entry/common.c:195
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f9e26d9ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: fffffffffffffffc RBX: 00007f9e26d9f6d4 RCX: 000000000045c849
RDX: 0000000000010001 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000001fa R14: 00000000004c4235 R15: 000000000076bfac
Kernel Offset: disabled
Rebooting in 86400 seconds..