KASAN: invalid-access Read in kmem_cache_destroy

[Dmitry Vyukov]

On Thu, Jan 28, 2021 at 1:30 PM Vincenzo Frascino
<vincenzo.frascino at arm.com> wrote:
>
> On 1/27/21 7:50 PM, Andrey Konovalov wrote:
> > On Wed, Jan 27, 2021 at 6:44 PM Mark Brown <broonie at kernel.org> wrote:
> >>
> >> On Wed, Jan 27, 2021 at 06:14:13PM +0100, Dmitry Vyukov wrote:
> >>> On Wed, Jan 27, 2021 at 5:58 PM syzbot
> >>> <syzbot+2a52b6c31dbefb1e9d9f at syzkaller.appspotmail.com> wrote:
> >>>>
> >>>> Hello,
> >>>>
> >>>> syzbot found the following issue on:
> >>>>
> >>>> HEAD commit:    2ab38c17 mailmap: remove the "repo-abbrev" comment
> >>>> git tree:       upstream
> >>>> console output: https://syzkaller.appspot.com/x/log.txt?x=12eb4ad8d00000
> >>>> kernel config:  https://syzkaller.appspot.com/x/.config?x=ad43be24faf1194c
> >>>> dashboard link: https://syzkaller.appspot.com/bug?extid=2a52b6c31dbefb1e9d9f
> >>>> userspace arch: arm64
> >>>>
> >>>> Unfortunately, I don't have any reproducer for this issue yet.
> >>>>
> >>>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> >>>> Reported-by: syzbot+2a52b6c31dbefb1e9d9f at syzkaller.appspotmail.com
> >>>
> >>> This happens on arm64 instance with MTE enabled.
> >>> I don't see any corresponding reports on x86_64. So I would assume
> >>> it's a generic latent bug, or probably more likely a bug in MTE
> >>> support.
> >>
> >> Copying in Vincenso who's done a bunch of MTE stuff recently.
> >
> > Could be the same issue as:
> >
> > https://lkml.org/lkml/2021/1/27/1109
> >
>
> I had a look at the trace and I agree with Andrey it seems the same issue.


#syz fix: Revert "mm/slub: fix a memory leak in sysfs_slab_add()"