linux-kernel - Re: [PATCH] mm/kasan: Fix null pointer dereference warning in qlink_to

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Date:   Mon, 27 Jun 2022 17:30:58 +0300
From:   Andrey Ryabinin <ryabinin.a.a@...il.com>
To:     Gautam Menghani <gautammenghani201@...il.com>, glider@...gle.com,
        andreyknvl@...il.com, dvyukov@...gle.com,
        vincenzo.frascino@....com, akpm@...ux-foundation.org
Cc:     kasan-dev@...glegroups.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, skhan@...uxfoundation.org
Subject: Re: [PATCH] mm/kasan: Fix null pointer dereference warning in
 qlink_to_cache()



On 6/26/22 20:03, Gautam Menghani wrote:
> The function virt_to_slab() declared in slab.h can return NULL if the
> address does not belong to a slab. This case is not handled in the
> function qlink_to_cache() in the file quarantine.c, which can cause a
> NULL pointer dereference in "virt_to_slab(qlink)->slab_cache". 

qlink is always slab address, so I don't think this patch makes sense.
NAK.