------------[ cut here ]------------ WARNING: CPU: 1 PID: 13080 at fs/io_uring.c:1164 req_ref_get fs/io_uring.c:1164 [inline] WARNING: CPU: 1 PID: 13080 at fs/io_uring.c:1164 io_wq_submit_work+0x272/0x300 fs/io_uring.c:6731 Modules linked in: CPU: 1 PID: 13080 Comm: syz-executor.3 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 43 36 91 ff 83 fb 7f 76 1b e8 f9 2e 91 ff be 04 00 00 00 4c 89 ef e8 5c 7c d8 ff f0 ff 45 a4 e9 41 fe ff ff e8 de 2e 91 ff <0f> 0b eb dc e8 d5 2e 91 ff 4c 89 e7 e8 ad dc fb ff 48 85 c0 49 89 RSP: 0018:ffffc90016b5f878 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000 RDX: ffff888020398000 RSI: ffffffff81e4de62 RDI: 0000000000000003 RBP: ffff888073841d38 R08: 000000000000007f R09: ffff888073841cdf R10: ffffffff81e4de3d R11: 0000000000000000 R12: ffff888073841c80 R13: ffff888073841cdc R14: ffff888073841cd8 R15: 0000000000100000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0063) knlGS:00000000f552db40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002df25000 CR3: 00000000436d3000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_run_cancel fs/io-wq.c:809 [inline] io_acct_cancel_pending_work.isra.0+0x2a9/0x5e0 fs/io-wq.c:950 io_wqe_cancel_pending_work+0x6c/0x130 fs/io-wq.c:968 io_wq_destroy fs/io-wq.c:1185 [inline] io_wq_put_and_exit+0x7d1/0xc70 fs/io-wq.c:1198 io_uring_clean_tctx fs/io_uring.c:9607 [inline] io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9687 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x265/0x2a30 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x2160 kernel/signal.c:2868 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f54549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f552d5fc EFLAGS: 00000296 ORIG_RAX: 00000000000001aa RAX: 0000000000000200 RBX: 0000000000000004 RCX: 00000000000045f5 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi