syzbot


INFO: task hung in kvm_mmu_pre_destroy_vm

Status: auto-obsoleted due to no activity on 2023/09/22 14:35
Subsystems: kvm
[Documentation on labels]
First crash: 531d, last: 531d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 INFO: task hung in kvm_mmu_pre_destroy_vm (4) syz error 8 656d 1035d 0/1 upstream: reported syz repro on 2022/02/05 19:19
linux-4.14 INFO: task hung in kvm_mmu_pre_destroy_vm (2) 1 1643d 1643d 0/1 auto-closed as invalid on 2020/10/05 15:28
linux-4.14 INFO: task hung in kvm_mmu_pre_destroy_vm 3 1801d 1837d 0/1 auto-closed as invalid on 2020/04/30 03:32
linux-4.14 INFO: task hung in kvm_mmu_pre_destroy_vm (3) 5 1337d 1494d 0/1 auto-closed as invalid on 2021/08/07 02:23

Sample crash report:
INFO: task syz-executor.5:27738 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc7-syzkaller-00226-ga92b7d26c743 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:27688 pid:27738 ppid:5368   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
 kthread_stop+0x18b/0x5b0 kernel/kthread.c:700
 kvm_mmu_pre_destroy_vm+0x45/0x60 arch/x86/kvm/mmu/mmu.c:7179
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1305 [inline]
 kvm_put_kvm+0x255/0xae0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1365
 kvm_vm_release+0x43/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1388

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/24 14:29 upstream a92b7d26c743 09ffe269 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in kvm_mmu_pre_destroy_vm
* Struck through repros no longer work on HEAD.