syzbot


INFO: task hung in io_sq_thread_stop
Status: upstream: reported C repro on 2020/09/09 08:49
Reported-by: syzbot+3c23789ea938faaef049@syzkaller.appspotmail.com
Fix commit: io_uring: don't sleep schedule in SQPOLL thread if we need to park
Patched on: [ci-upstream-linux-next-kasan-gce-root], missing on: [ci-qemu-upstream ci-qemu-upstream-386 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 13d, last: 11d

Cause bisection: the cause commit could be any of (bisect log):

  d730b1a29432 io_uring: add IOURING_REGISTER_RESTRICTIONS opcode
  7ec3d1dd9378 io_uring: allow disabling rings during the creation
Patch testing requests:
Created Duration User Patch Repo Result
2020/09/09 10:07 12m sgarzare@redhat.com https://github.com/stefano-garzarella/linux.git fix-io_uring_enter-hang report log

Sample crash report:

Crashes (7):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-linux-next-kasan-gce-root 2020/09/09 04:52 linux-next dff9f829 abf9ba4f .config log report syz C axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/09/10 07:30 linux-next 7204eaa2 409809d8 .config log report axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/09/10 05:54 linux-next 7204eaa2 409809d8 .config log report axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/09/09 13:56 linux-next 7204eaa2 0ea7a887 .config log report axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/09/08 21:03 linux-next dff9f829 abf9ba4f .config log report axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/09/08 21:01 linux-next dff9f829 abf9ba4f .config log report axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/09/08 21:00 linux-next dff9f829 abf9ba4f .config log report axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk