Thread (4 messages) 4 messages, 3 authors, 22h ago

Re: [syzbot] Monthly virt report (Jun 2026)

From: Aleksandr Nogikh <hidden>
Date: 2026-07-06 11:55:12
Also in: kvm, lkml, virtualization

On Mon, Jul 6, 2026 at 1:32 PM 'mawupeng' via syzkaller-bugs
[off-list ref] wrote:


On 周一 2026-7-6 17:24, Stefano Garzarella wrote:
quoted
On Thu, 2 Jul 2026 at 04:55, mawupeng [off-list ref] wrote:
quoted
On 周四 2026-6-25 04:32, syzbot wrote:
quoted
Hello virt maintainers/developers,

This is a 31-day syzbot report for the virt subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/virt

During the period, 0 new issues were detected and 0 were fixed.
In total, 5 issues are still open and 61 have already been fixed.
There are also 2 low-priority issues.

Some of the still happening issues:

Ref Crashes Repro Title
<1> 24      No    WARNING: refcount bug in call_timer_fn (4)
                  https://syzkaller.appspot.com/bug?extid=07dcf509f4c013e25dc5
<2> 3       Yes   memory leak in __vsock_create (2)
                  https://syzkaller.appspot.com/bug?extid=1b2c9c4a0f8708082678
Hi,

This is regarding the still-open "memory leak in __vsock_create (2)"
bug (#2 in the monthly virt report, extid 1b2c9c4a0f8708082678):
  https://syzkaller.appspot.com/bug?extid=1b2c9c4a0f8708082678

I spent some time analyzing the root cause and the previous fix
attempt; below is a summary and a direction that tested out.
[...]
quoted
I'm not subscribed to follow the list at full volume; happy to send a
formal patch (with the af_vsock.h / pending_work changes folded in)
if the direction looks right to the maintainers.
Yes, please, a formal patch with a great commit message is much better
than a long text to read IMO.
Thanks for replying.

As we conducted more thorough testing and further analysis of our own fix,
we found that it is not as comprehensive as the existing AI-generated fix
provided[1].

Could you please let us know if there are any issues with this AI-generated fix?

[1]: https://syzkaller.appspot.com/ai_job?id=cd978d21-2110-4f57-9525-d7d91c4a7e02
I'll chime in from the syzbot side.
If anything is missing, please let us know :)

Otherwise, please note that the bot can incorporate code review notes
and, once the patch is ready, submit it to the LKML:
https://github.com/google/syzkaller/blob/master/docs/syzbot_ai_patches.md

Best Regards,
Aleksandr
quoted
Thanks,
Stefano
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