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WARNING: CPU: 0 PID: 10250 at lib/percpu-refcount.c:112 percpu_ref_exit+0xa7/0xb0 lib/percpu-refcount.c:112
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 10250 Comm: kworker/0:8 Not tainted 5.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events io_ring_exit_work
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:175 [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:112
Code: 25 00 00 74 08 4c 89 f7 e8 c6 5f 19 fe 49 c7 06 03 00 00 00 eb 05 e8 d8 7b db fd 5b 41 5c 41 5d 41 5e 41 5f c3 e8 c9 7b db fd <0f> 0b eb c7 0f 1f 44 00 00 41 57 41 56 53 49 89 f6 48 89 fb e8 b0
RSP: 0018:ffffc90001737c50 EFLAGS: 00010293
RAX: ffffffff8397e5a7 RBX: ffff888041344018 RCX: ffff8880a8a76140
RDX: 0000000000000000 RSI: 0000607f514e9530 RDI: 0000000000000000
RBP: ffff888088b52550 R08: ffffffff8397e547 R09: fffffbfff16294c4
R10: fffffbfff16294c4 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff11008268801 R14: ffff888041344008 R15: 0000607f514e9530
 io_ring_ctx_free fs/io_uring.c:7254 [inline]
 io_ring_exit_work+0x43c/0x730 fs/io_uring.c:7313
 process_one_work+0x76e/0xfd0 kernel/workqueue.c:2268
 worker_thread+0xa7f/0x1450 kernel/workqueue.c:2414
 kthread+0x353/0x380 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..