Bug#986552: linux-image-4.19.0-14-amd64: KVM crashes with list_add corruption kernel BUG

[Salvatore Bonaccorso <carnil@debian.org>]

Control: tags -1 + moreinfo

Hi,

On Wed, Apr 07, 2021 at 01:43:28PM +0300, Andrey Lelikov wrote:
> Package: src:linux
> Version: 4.19.171-2
> Severity: grave
> Tags: upstream
> Justification: causes non-serious data loss
> 
> Dear Maintainer,
> 
> Regular qemu/vkm running on regular kernel, crashes about a week of uptime, with no apparent reason. The VM is running a single network and IO heavy VM (video securty DVR).
> 
> I honestly do not know what happened in VM at the moment of crash.
> 
> kexec is installed, full kernel core dumps are availbale.
> 
> [407531.000500] list_add corruption. prev->next should be next (ffff983fe7fe80b0), but was ffff983fe44a9eb0. (prev=ffff98400f122b60).
> [407531.000822] Call Trace:
> [407531.000830]  load_balance+0x53f/0xa00
> [407531.000840]  pick_next_task_fair+0x18f/0x620
> [407531.000851]  __schedule+0x154/0x840
> [407531.000859]  schedule+0x28/0x80
> [407531.000877]  kvm_vcpu_block+0x84/0x300 [kvm]
> [407531.000897]  kvm_arch_vcpu_ioctl_run+0xcd1/0x19e0 [kvm]
> [407531.000910]  ? seccomp_run_filters+0x5c/0xb0
> [407531.000927]  kvm_vcpu_ioctl+0x2b8/0x5e0 [kvm]
> [407531.000937]  ? __seccomp_filter+0x44/0x4a0
> [407531.000950]  do_vfs_ioctl+0xa4/0x630
> [407531.000962]  ? syscall_trace_enter+0x192/0x2b0
> [407531.000974]  ksys_ioctl+0x60/0x90
> [407531.000985]  __x64_sys_ioctl+0x16/0x20
> [407531.000993]  do_syscall_64+0x53/0x110
> [407531.001003]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Is this still reproducible with the current version in stable?
(4.19.181-1).

Regards,
Salvatore