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From:   Dmitry Vyukov <dvyukov@google.com>
Date:   Mon, 10 Jul 2023 09:43:36 +0200
Message-ID: <CACT4Y+YAyK02ORyzS79ub+XOK6x5LV8_2k4aztwzjP=0dm--RQ@mail.gmail.com>
Subject: Re: [syzbot] [mm?] [reiserfs?] kernel panic: stack is corrupted in ___slab_alloc
To:     "Lameter, Christopher" <cl@os.amperecomputing.com>
Cc:     David Rientjes <rientjes@google.com>,
        syzbot <syzbot+cf0693aee9ea61dda749@syzkaller.appspotmail.com>,
        42.hyeyoo@gmail.com, Andrew Morton <akpm@linux-foundation.org>,
        iamjoonsoo.kim@lge.com, keescook@chromium.org,
        linux-fsdevel@vger.kernel.org, linux-hardening@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        penberg@kernel.org, reiserfs-devel@vger.kernel.org,
        roman.gushchin@linux.dev, syzkaller-bugs@googlegroups.com,
        Vlastimil Babka <vbabka@suse.cz>, Jan Kara <jack@suse.cz>
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On Thu, 6 Jul 2023 at 20:33, Lameter, Christopher
<cl@os.amperecomputing.com> wrote:
>
> On Mon, 3 Jul 2023, Dmitry Vyukov wrote:
>
> >> This is happening during while mounting reiserfs, so I'm inclined to think
> >> it's more of a reisterfs issue than a slab allocator issue :/
>
> Have you tried to run with the "slub_debug" kernel option to figure out
> what got corrupted?

Can slub_debug detect anything that KASAN can't?
I would assume KASAN can detect more bugs (e.g. stack/globals) and
report way better. And it was already enabled in the config.