------------[ cut here ]------------ WARNING: CPU: 1 PID: 18866 at fs/io_uring.c:9042 io_uring_cancel_task_requests+0xe55/0x10c0 fs/io_uring.c:9042 Modules linked in: CPU: 1 PID: 18866 Comm: syz-executor.1 Not tainted 5.11.0-rc5-next-20210129-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:io_uring_cancel_task_requests+0xe55/0x10c0 fs/io_uring.c:9042 Code: 00 00 e9 1c fe ff ff 48 8b 7c 24 18 e8 f4 b4 da ff e9 f2 fc ff ff 48 8b 7c 24 18 e8 e5 b4 da ff e9 64 f2 ff ff e8 db 15 97 ff <0f> 0b e9 ed f2 ff ff e8 df b4 da ff e9 c8 f5 ff ff 4c 89 ef e8 52 RSP: 0018:ffffc9000b417950 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888022dde000 RCX: 0000000000000000 RDX: ffff8880172e8000 RSI: ffffffff81dc0a25 RDI: ffff888022dde0d0 RBP: ffff888022dde0e8 R08: 0000000000000000 R09: ffff8880172e8007 R10: ffffffff81dbfc9f R11: 0000000000000000 R12: ffff888022dde000 R13: ffff8880172e8000 R14: ffff8880118b5400 R15: ffff88806c59e020 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563018ded180 CR3: 0000000013eb4000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_uring_flush+0x47b/0x6e0 fs/io_uring.c:9227 filp_close+0xb4/0x170 fs/open.c:1295 close_files fs/file.c:403 [inline] put_files_struct fs/file.c:418 [inline] put_files_struct+0x1cc/0x350 fs/file.c:415 exit_files+0x7e/0xa0 fs/file.c:435 do_exit+0xc22/0x2ae0 kernel/exit.c:820 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x427/0x20f0 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: Unable to access opcode bytes at RIP 0x45e1ef. RSP: 002b:00007fdf16352be8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9 RAX: 0000000000000003 RBX: 0000000020000280 RCX: 000000000045e219 RDX: 0000000020fee000 RSI: 0000000020000280 RDI: 0000000000004cd7 RBP: 000000000119bfd8 R08: 0000000020000340 R09: 0000000020000340 R10: 0000000020000300 R11: 0000000000000206 R12: 0000000020fee000 R13: 0000000020ffd000 R14: 0000000020000340 R15: 0000000020000300