------------[ cut here ]------------ WARNING: CPU: 1 PID: 12088 at fs/io_uring.c:1164 req_ref_get fs/io_uring.c:1164 [inline] WARNING: CPU: 1 PID: 12088 at fs/io_uring.c:1164 io_wq_submit_work+0x272/0x300 fs/io_uring.c:6731 Modules linked in: CPU: 1 PID: 12088 Comm: iou-wrk-12031 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:req_ref_get fs/io_uring.c:1164 [inline] RIP: 0010:io_wq_submit_work+0x272/0x300 fs/io_uring.c:6731 Code: e8 c3 ba 91 ff 83 fb 7f 76 1b e8 09 b2 91 ff be 04 00 00 00 4c 89 ef e8 bc 79 d8 ff f0 ff 45 a4 e9 41 fe ff ff e8 ee b1 91 ff <0f> 0b eb dc e8 e5 b1 91 ff 4c 89 e7 e8 ad dc fb ff 48 85 c0 49 89 RSP: 0018:ffffc90017267cd8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000 RDX: ffff888088870140 RSI: ffffffff81e39242 RDI: 0000000000000003 RBP: ffff888077020df8 R08: 000000000000007f R09: ffff888077020d9f R10: ffffffff81e3921d R11: 0000000000000000 R12: ffff888077020d40 R13: ffff888077020d9c R14: ffff888077020d98 R15: 0000000000100000 FS: 00007fe91b8da700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000540198 CR3: 000000001ecb9000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_worker_handle_work+0x9c0/0x1820 fs/io-wq.c:521 io_wqe_worker+0x57b/0xe60 fs/io-wq.c:572 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 12088 Comm: iou-wrk-12031 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 panic+0x2b0/0x6dd kernel/panic.c:232 __warn.cold+0x35/0x44 kernel/panic.c:603 report_bug+0x1bd/0x210 lib/bug.c:199 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:239 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:259 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:566 RIP: 0010:req_ref_get fs/io_uring.c:1164 [inline] RIP: 0010:io_wq_submit_work+0x272/0x300 fs/io_uring.c:6731 Code: e8 c3 ba 91 ff 83 fb 7f 76 1b e8 09 b2 91 ff be 04 00 00 00 4c 89 ef e8 bc 79 d8 ff f0 ff 45 a4 e9 41 fe ff ff e8 ee b1 91 ff <0f> 0b eb dc e8 e5 b1 91 ff 4c 89 e7 e8 ad dc fb ff 48 85 c0 49 89 RSP: 0018:ffffc90017267cd8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000 RDX: ffff888088870140 RSI: ffffffff81e39242 RDI: 0000000000000003 RBP: ffff888077020df8 R08: 000000000000007f R09: ffff888077020d9f R10: ffffffff81e3921d R11: 0000000000000000 R12: ffff888077020d40 R13: ffff888077020d9c R14: ffff888077020d98 R15: 0000000000100000 io_worker_handle_work+0x9c0/0x1820 fs/io-wq.c:521 io_wqe_worker+0x57b/0xe60 fs/io-wq.c:572 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Kernel Offset: disabled Rebooting in 86400 seconds..