------------[ cut here ]------------
WARNING: CPU: 0 PID: 3644 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: 3644 Comm: kworker/0:5 Not tainted 5.7.0-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:105 [inline]
 do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:197
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216
 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 66 d0 18 fe 49 c7 06 03 00 00 00 eb 05 e8 a8 eb d9 fd 5b 41 5c 41 5d 41 5e 41 5f c3 e8 99 eb d9 fd <0f> 0b eb c7 0f 1f 44 00 00 41 57 41 56 53 49 89 f6 48 89 fb e8 80
RSP: 0018:ffffc9000d44fc58 EFLAGS: 00010293
RAX: ffffffff839ab797 RBX: ffff88809f392018 RCX: ffff888099fac540
RDX: 0000000000000000 RSI: 0000607f51438970 RDI: 0000000000000000
RBP: ffff88809f392630 R08: ffffffff839ab737 R09: fffffbfff162e0c9
R10: fffffbfff162e0c9 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff11013e72401 R14: ffff88809f392008 R15: 0000607f51438970
 io_ring_ctx_free fs/io_uring.c:7320 [inline]
 io_ring_exit_work+0x430/0x700 fs/io_uring.c:7378
 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:351
Kernel Offset: disabled
Rebooting in 86400 seconds..