From: Uladzislau Rezki <urezki@gmail.com>
To: Hui Zhu <hui.zhu@linux.dev>
Cc: Hui Zhu <hui.zhu@linux.dev>,
Andrew Morton <akpm@linux-foundation.org>,
Uladzislau Rezki <urezki@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Hui Zhu <zhuhui@kylinos.cn>
Subject: Re: [PATCH] vmalloc: Fix NULL pointer dereference in is_vm_area_hugepages()
Date: Mon, 1 Jun 2026 11:29:48 +0200 [thread overview]
Message-ID: <ah1RDKIJThquEF8a@milan> (raw)
In-Reply-To: <cb2b4151-e096-4de5-a064-ee3bfa8cdc2c@arm.com>
On Fri, May 29, 2026 at 10:24:12AM +0530, Dev Jain wrote:
>
>
> On 29/05/26 7:11 am, Hui Zhu wrote:
> > From: Hui Zhu <zhuhui@kylinos.cn>
> >
> > find_vm_area() can return NULL if the given address is not a valid
> > vmalloc area. Check the return value before dereferencing it to avoid
> > a kernel crash.
> >
> > Fixes: 121e6f3258fe ("mm/vmalloc: hugepage vmalloc mappings")
> > Signed-off-by: Hui Zhu <zhuhui@kylinos.cn>
> > ---
>
> I think this makes sense from API PoV.
>
> Reviewed-by: Dev Jain <dev.jain@arm.com>
>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
--
Uladzislau Rezki
prev parent reply other threads:[~2026-06-01 9:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-29 1:41 [PATCH] vmalloc: Fix NULL pointer dereference in is_vm_area_hugepages() Hui Zhu
2026-05-29 4:54 ` Dev Jain
2026-06-01 9:29 ` Uladzislau Rezki [this message]
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