Re: [PATCH v2 0/3] vhost_task: Fix a bug where KVM wakes an exited task

On Thu, Sep 18, 2025, Sebastian Andrzej Siewior wrote:

On 2025-09-18 11:09:05 [-0400], Michael S. Tsirkin wrote:

quoted

So how about switching to this approach then?
Instead of piling up fixes like we seem to do now ...

I don't have a strong preference for 6.17, beyond landing a fix of some kind.
I think there are three options for 6.17, in order of "least like to break
something":

 1. Sebastian's get_task_struct() fix
 2. This series, without the KILLED sanity check in __vhost_task_wake()
 3. This series, with my fixup (with which syzbot was happy)

Longer term, I'd still like to land everything though.

quoted

Sean?

Since I am in To: here. You want me to resent my diff as a proper patch?

Ya, I think it makes sense to harden against UAF even if we fix the KVM bug more
directly.