ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 8134 Comm: kworker/u33:19 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: iou_exit io_ring_exit_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 vpanic+0x553/0x970 kernel/panic.c:651
 panic+0xd1/0xe0 kernel/panic.c:788
 check_panic_on_warn kernel/panic.c:525 [inline]
 check_panic_on_warn.cold+0x19/0x34 kernel/panic.c:520
 __warn.cold+0x191/0x318 kernel/panic.c:1104
 __report_bug+0x30f/0x440 lib/bug.c:254
 report_bug+0xb3/0x220 lib/bug.c:286
 handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436
 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593
RIP: 0010:io_ring_exit_work+0x479/0xd59 io_uring/io_uring.c:2356
Code: 8e e8 ab 14 48 01 48 8b 05 84 64 6b 0d 4c 8b 74 24 38 31 ff 49 29 c6 4c 89 f6 e8 62 ce d5 00 4d 85 f6 79 12 e8 b8 d3 d5 00 90 <0f> 0b 90 48 c7 44 24 20 70 17 00 00 e8 a6 d3 d5 00 48 8b 74 24 20
RSP: 0018:ffffc90021ba7a80 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88805ac28710 RCX: 0000000000000000
RDX: ffff88804f2b8000 RSI: ffffffff81358e18 RDI: ffff88804f2b8000
RBP: ffffc90021ba7c18 R08: 0000000000000007 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000000 R12: ffff88805ac28000
R13: dffffc0000000000 R14: ffffffffffffffff R15: 000000005ac28700
 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
 process_scheduled_works kernel/workqueue.c:3479 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..