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

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commit 7880287981 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: 1da177e4c3 ("Linux-2.6.12-rc2")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Alexander Potapenko 2018-03-23 13:49:02 +01:00 • committed by Ben Hutchings

parent e01726fb41

commit b0eae35358

1 changed files with 3 additions and 0 deletions

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net/netlink/af_netlink.c

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