------------[ cut here ]------------ WARNING: CPU: 0 PID: 4919 at fs/io_uring.c:1151 req_ref_put_and_test fs/io_uring.c:1151 [inline] WARNING: CPU: 0 PID: 4919 at fs/io_uring.c:1151 req_ref_put_and_test fs/io_uring.c:1146 [inline] WARNING: CPU: 0 PID: 4919 at fs/io_uring.c:1151 io_req_complete_post+0x946/0xa50 fs/io_uring.c:1794 Modules linked in: CPU: 0 PID: 4919 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_put_and_test fs/io_uring.c:1151 [inline] RIP: 0010:req_ref_put_and_test fs/io_uring.c:1146 [inline] RIP: 0010:io_req_complete_post+0x946/0xa50 fs/io_uring.c:1794 Code: e8 93 ff 48 8b 34 24 31 ff e8 36 ee 93 ff e9 6e fc ff ff e8 4c e8 93 ff 4c 89 ef e8 a4 bb 61 ff e9 38 f8 ff ff e8 3a e8 93 ff <0f> 0b e9 8a fb ff ff e8 2e e8 93 ff 49 8d 7e 58 31 c9 ba 01 00 00 RSP: 0018:ffffc90005567da8 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff88801e009dc0 RCX: ffffc9000fc77000 RDX: 0000000000040000 RSI: ffffffff81e15bf6 RDI: 0000000000000003 RBP: ffff888014998000 R08: 000000000000007f R09: ffff88801e009e1f R10: ffffffff81e1577d R11: 0000000000000000 R12: ffff888014998640 R13: ffff88801e009e1c R14: 000000000000007f R15: ffff88801e009e18 FS: 00007fb4eafea700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000027ad848 CR3: 000000007b550000 CR4: 00000000001526f0 Call Trace: tctx_task_work+0x189/0x6c0 fs/io_uring.c:2158 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_signal include/linux/tracehook.h:212 [inline] handle_signal_work kernel/entry/common.c:146 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x256/0x290 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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb4eafea188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000001000 RBX: 000000000056c038 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 000000000000688c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fff93bb01cf R14: 00007fb4eafea300 R15: 0000000000022000