Re: linux-next: build failure after merge of the tip tree

Ojaswin Mujoo
2026-03-11T16:31:24Z

On Wed, Mar 11, 2026 at 05:09:04PM +0100, Peter Zijlstra wrote:
> On Wed, Mar 11, 2026 at 08:03:50PM +0530, Ojaswin Mujoo wrote:
> > On Wed, Mar 11, 2026 at 11:37:43AM +0100, Peter Zijlstra wrote:
>
> > > [11:17:27] ==================================================================
> > > [11:17:27] BUG: KASAN: slab-use-after-free in __percpu_counter_init_many+0x21b/0x2f0
> > > [11:17:27] Write of size 8 at addr ffff8880029425a8 by task kunit_try_catch/37
> >
> > Hi Peter,
> >
> > I believe this issue is resolved with [1]. However, I think this might
> > not be the same as the issue reported originally as we the original
> > issue seems to be in mballoc-tests rather than extent-tests. I'll try to
> > look into it a bit more.
> >
> > [1] https://lore.kernel.org/linux-ext4/5bb9041471dab8ce870c191c19cbe4df57473be8.1772381213.git.ritesh.list@gmail.com/
>
> I can confirm that solves the KASAN splat; it also cures the defconfig
> hang that was initially mis-attributed to the mutex patch, but turned
> out to be memory corruption due to that issue KASAN found.
>
> FWIW:
>
> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>

Awesome, thanks for testing.

Regards,
ojaswin