On Fri, Jul 31, 2026 at 01:21:40PM -0700, Link Lin wrote: > On Thu, Jul 23, 2026 at 2:15 AM Michael S. Tsirkin <[email protected]> wrote: > > > > I suspect rest of work items we have, e.g. > > update_balloon_stats_work/update_balloon_size_work > > all have issues around freeze/restore and error handling. > > > > -- > > MST > > > > Hi Michael, > > We have indeed discovered a kernel crash in update_balloon_stats_work > after the balloon driver failed to resume and initialize in our > production fleet. > > Alex Wilkins <[email protected]> diagnosed, root caused, and > reported this vulnerability.
I wouldn't call this a "vulnerability" just a garden variety bug. > I am currently drafting and testing a > 2-patch series to gracefully unregister callbacks and cancel work > items on resume failure so that the VM continues running without the > balloon driver instead of crashing with a kernel panic. > > I wanted to follow up and let you know that we are actively working on > this. I will send out the patches to the list as soon as they are > sufficiently tested. > > Best, > Link
