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WARNING: CPU: 3 PID: 3824 at lib/percpu-refcount.c:112 percpu_ref_exit+0xa3/0xd0 lib/percpu-refcount.c:112
Kernel panic - not syncing: panic_on_warn set ...
CPU: 3 PID: 3824 Comm: kworker/3:2 Not tainted 5.7.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: events io_ring_exit_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:105 [inline]
 fixup_bug arch/x86/kernel/traps.c:100 [inline]
 do_error_trap+0x12b/0x220 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+0xa3/0xd0 lib/percpu-refcount.c:112
Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 1a 48 c7 43 08 03 00 00 00 5b 5d 41 5c e9 e2 34 da fd e8 dd 34 da fd <0f> 0b eb c2 4c 89 e7 e8 41 4c 19 fe eb dc e8 ba 4b 19 fe eb aa 4c
RSP: 0018:ffffc9000924fcd0 EFLAGS: 00010293
RAX: ffff888028d75dc0 RBX: ffff8880288dc000 RCX: ffffffff8399c5dd
RDX: 0000000000000000 RSI: ffffffff8399c643 RDI: ffff8880288dc018
RBP: 0000607f810a9800 R08: ffff888028d75dc0 R09: 0000000000000001
R10: ffffffff8c349ab7 R11: fffffbfff1869356 R12: ffff8880288dc008
R13: ffff8880288dc100 R14: 0000000000000000 R15: ffff88802d1375c0
 io_ring_ctx_free fs/io_uring.c:7320 [inline]
 io_ring_exit_work+0x2f1/0x640 fs/io_uring.c:7378
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Kernel Offset: disabled
Rebooting in 86400 seconds..