syzbot


possible deadlock in wake_up_all_idle_cpus
Status: upstream: reported C repro on 2021/10/15 16:51
Reported-by: syzbot+d5b23b18d2f4feae8a67@syzkaller.appspotmail.com
Fix commit: 96611c26dc35 sched: Improve wake_up_all_idle_cpus() take #2
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: 48d, last: 39d

Cause bisection: introduced by (bisect log) :
commit 8850cb663b5cda04d33f9cfbc38889d73d3c8e24
Author: Peter Zijlstra <peterz@infradead.org>
Date: Tue Sep 21 20:16:02 2021 +0000

  sched: Simplify wake_up_*idle*()

Crash: possible deadlock in wake_up_all_idle_cpus (log)
Repro: C syz .config

Sample crash report:

Crashes (14):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/10/16 18:06 linux-next 7c832d2f9b95 0c5d9412 .config log report syz C possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/22 23:09 linux-next cf6c9d12750c 282f03fb .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/21 01:01 linux-next 51dba6e335ff f111d03b .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/20 23:19 linux-next 51dba6e335ff f111d03b .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/20 08:49 linux-next 51dba6e335ff 466b7db1 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/19 20:59 linux-next 60e8840126bd 466b7db1 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/19 16:48 linux-next 60e8840126bd 24dc29db .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/18 10:35 linux-next 60e8840126bd 0c5d9412 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/18 09:16 linux-next 7c832d2f9b95 0c5d9412 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/17 23:49 linux-next 7c832d2f9b95 0c5d9412 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/17 21:58 linux-next 7c832d2f9b95 0c5d9412 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/17 04:20 linux-next 7c832d2f9b95 0c5d9412 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/16 17:16 linux-next 7c832d2f9b95 0c5d9412 .config log report info possible deadlock in wake_up_all_idle_cpus
ci-upstream-linux-next-kasan-gce-root 2021/10/13 23:38 linux-next 8006b911c90a 5462d470 .config log report info possible deadlock in wake_up_all_idle_cpus