syzbot


INFO: task hung in io_wqe_worker
Status: upstream: reported C repro on 2021/10/21 21:10
Reported-by: syzbot+27d62ee6f256b186883e@syzkaller.appspotmail.com
Fix commit: 1d5f5ea7cb7d io-wq: remove worker to owner tw dependency
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte 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-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 46d, last: 44d

Cause bisection: introduced by (bisect log) [no-op commit]:
commit add0733d19c5610b10a1b398fcfb370a9f21afec
Author: Anthony Koo <Anthony.Koo@amd.com>
Date: Sun Jul 18 01:46:31 2021 +0000

  drm/amd/display: [FW Promotion] Release 0.0.76

Crash: BUG: sleeping function called from invalid context in lock_sock_nested (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/10/28 20:32 18m asml.silence@gmail.com https://github.com/isilence/linux.git syz_coredump OK
2021/10/21 23:48 13m asml.silence@gmail.com git://git.kernel.dk/linux-block io_uring-5.15 report log

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2021/10/17 20:52 upstream d999ade1cc86 0c5d9412 .config log report syz C INFO: task hung in io_wqe_worker
ci-upstream-kasan-gce-root 2021/10/17 14:53 upstream d999ade1cc86 0c5d9412 .config log report info INFO: task hung in io_wqe_worker
ci-upstream-kasan-gce-root 2021/10/16 00:49 upstream ec681c53f8d2 0c5d9412 .config log report info INFO: task hung in io_wqe_worker