From: Alexander Potapenko <glider@google.com>
Date: Fri, 23 Mar 2018 12:49:02 +0000 (+0100)
Subject: netlink: make sure nladdr has correct size in netlink_connect()
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=85612401b97f42ca3addf3d5786cc6de4fcb8fda;p=pandora-kernel.git

netlink: make sure nladdr has correct size in netlink_connect()

commit 7880287981b60a6808f39f297bb66936e8bdf57a upstream.

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@google.com>
Fixes: 1da177e4c3f41524 ("Linux-2.6.12-rc2")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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