syzbot


INFO: rcu detected stall in io_wqe_worker (2)
Status: internal: reported C repro on 2021/10/27 06:27
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: c5e0321e43de Revert "devlink: Remove not-executed trap policer notifications"
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-kmsan-gce ci-upstream-kmsan-gce-386 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]
First crash: 41d, last: 40d

Cause bisection: introduced by (bisect log) :
commit 22849b5ea5952d853547cc5e0651f34a246b2a4f
Author: Leon Romanovsky <leonro@nvidia.com>
Date: Thu Oct 21 14:16:14 2021 +0000

  devlink: Remove not-executed trap policer notifications

Crash: WARNING in nsim_dev_reload_destroy (log)
Repro: C syz .config
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in io_wqe_worker 1 735d 734d 0/22 closed as invalid on 2019/12/04 14:04

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/10/27 06:22 linux-next 2376e5fe91bc d50eb50a .config log report syz C INFO: rcu detected stall in io_wqe_worker
ci-upstream-linux-next-kasan-gce-root 2021/10/27 03:14 linux-next 2376e5fe91bc d50eb50a .config log report info INFO: rcu detected stall in io_wqe_worker