syzbot


WARNING in io_req_complete_post

Status: auto-closed as invalid on 2022/01/09 13:32
Reported-by: syzbot+a0516daac8b536b4b8c0@syzkaller.appspotmail.com
First crash: 448d, last: 445d

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 14342 at fs/io_uring.c:1151 req_ref_put_and_test fs/io_uring.c:1151 [inline]
WARNING: CPU: 0 PID: 14342 at fs/io_uring.c:1151 req_ref_put_and_test fs/io_uring.c:1146 [inline]
WARNING: CPU: 0 PID: 14342 at fs/io_uring.c:1151 io_req_complete_post+0x946/0xa50 fs/io_uring.c:1794
Modules linked in:
CPU: 0 PID: 14342 Comm: syz-executor.1 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: 68 93 ff 48 8b 34 24 31 ff e8 b6 6d 93 ff e9 6e fc ff ff e8 4c 68 93 ff 4c 89 ef e8 94 40 61 ff e9 38 f8 ff ff e8 3a 68 93 ff <0f> 0b e9 8a fb ff ff e8 2e 68 93 ff 49 8d 7e 58 31 c9 ba 01 00 00
RSP: 0018:ffffc9000aef7da8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff888025542dc0 RCX: ffffc9000a8ea000
RDX: 0000000000040000 RSI: ffffffff81e2a506 RDI: 0000000000000003
RBP: ffff88808ac56000 R08: 000000000000007f R09: ffff888025542e1f
R10: ffffffff81e2a08d R11: 0000000000000000 R12: ffff88808ac56640
R13: ffff888025542e1c R14: 000000000000007f R15: ffff888025542e18
FS:  00007f7ceddf7700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007c6e4000 CR4: 0000000000350ef0
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:00007f7ceddf7188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000304 RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000304 RDI: 0000000000000004
RBP: 00007f7ceddf71d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffea30c8f4f R14: 00007f7ceddf7300 R15: 0000000000022000

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2021/09/11 13:31 upstream 926de8c4326c 5ae8508a .config log report info WARNING in io_req_complete_post
ci-upstream-kasan-gce-selinux-root 2021/09/11 05:53 upstream 926de8c4326c 5ae8508a .config log report info WARNING in io_req_complete_post
ci-upstream-linux-next-kasan-gce-root 2021/09/08 01:29 linux-next b2bb710d34d5 064c9eb7 .config log report info WARNING in io_req_complete_post
* Struck through repros no longer work on HEAD.