linux-kernel - Re: [PATCH] netlink: make sure nladdr has correct size in netlink

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Message-ID: <eb767d8b-602f-bfb5-618e-784e61358606@gmail.com>
Date:   Fri, 23 Mar 2018 05:57:18 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Alexander Potapenko <glider@...gle.com>, dvyukov@...gle.com,
        edumazet@...gle.com, davem@...emloft.net
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netlink: make sure nladdr has correct size in
 netlink_connect()



On 03/23/2018 05:49 AM, Alexander Potapenko wrote:
> KMSAN reports use of uninitialized memory in the case when |alen| is
> smaller than sizeof(struct sockaddr_nl), and therefore |nladdr| isn't
> fully copied from the userspace.
> 
> Signed-off-by: Alexander Potapenko <glider@...gle.com>
> Fixes: 1da177e4c3f41524 ("Linux-2.6.12-rc2")

Reviewed-by: Eric Dumazet <edumazet@...gle.com>

Thanks Alexander.