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

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Message-Id: <20180325.211532.2200869889572938343.davem@davemloft.net>
Date:   Sun, 25 Mar 2018 21:15:32 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     glider@...gle.com
Cc:     dvyukov@...gle.com, edumazet@...gle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netlink: make sure nladdr has correct size in
 netlink_connect()

From: Alexander Potapenko <glider@...gle.com>
Date: Fri, 23 Mar 2018 13:49:02 +0100

> 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")
> ---
> v2: fixed a typo spotted by Eric Dumazet

Applied and queued up for -stable, thank you.