Re: [PATCH] kasan: fix cache shrink race with CPU hotplug

[Andrew Morton]

On Fri,  7 Aug 2026 14:50:31 +0800 Hui Su <sh_def@xxxxxxx> wrote:

> > Especially when proposing a backport.  At present we've provided our
> > -stable recipients no reason to accept the patch.
> > 
> > Documentation/process/stable-kernel-rules.rst says "it must fix a real
> > bug that bothers people".
> > 
> 
> Yes, I agree. I did not include the real bug dmesg in the original
> changelog, which made the stable rationale unclear.
> 
> The 9p case above shows that this is a real bug: a userspace-triggered
> teardown path can leave objects in the 9p fcall cache and report the slab
> shutdown warning after umount.

OK, thanks.

> Should I keep Cc: stable in PATCH v2 with this dmesg and
> userspace-visible effect added to the changelog?

Yes please!