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netlink: validate addr_len on bind

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Otherwise an out of bounds read could happen.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hannes Frederic Sowa 2012-12-15 15:42:19 +00:00 committed by David S. Miller
parent 9f1e0ad0ad
commit 4e4b53768f
1 changed files with 3 additions and 0 deletions
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3
net/netlink/af_netlink.c
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@ -669,6 +669,9 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr,
struct sockaddr_nl *nladdr = (struct sockaddr_nl *)addr;
int err;
if (addr_len < sizeof(struct sockaddr_nl))
return -EINVAL;
if (nladdr->nl_family != AF_NETLINK)
return -EINVAL;