syzbot


possible deadlock in __queue_work
Status: upstream: reported on 2021/04/27 15:18
Reported-by: syzbot+6beae4000559d41d80f8@syzkaller.appspotmail.com
Fix commit: 3f804f6d KVM: x86: Prevent deadlock against tk_core.seq
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte 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 ci2-upstream-kcsan-gce], missing on: [ci-qemu2-arm32 ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-usb]
First crash: 23d, last: 23d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 possible deadlock in __queue_work 7 330d 438d 0/1 auto-closed as invalid on 2020/10/15 10:06
linux-4.19 possible deadlock in __queue_work 3 273d 368d 0/1 auto-closed as invalid on 2020/12/11 19:10

Sample crash report:

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-qemu-upstream 2021/04/20 10:25 upstream 7af08140 c0ced557 .config log report info possible deadlock in __queue_work