diff options
| author | Steffen Hurrle <steffen@hurrle.net> | 2014-01-17 22:53:15 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-19 08:04:16 +0100 |
| commit | 342dfc306fb32155314dad277f3c3686b83fb9f1 (patch) | |
| tree | a0d220f9310725c72bac70945261c9282e7cf305 /net/ipv4/udp.c | |
| parent | net: introduce SO_BPF_EXTENSIONS (diff) | |
| download | linux-342dfc306fb32155314dad277f3c3686b83fb9f1.tar.xz linux-342dfc306fb32155314dad277f3c3686b83fb9f1.zip | |
net: add build-time checks for msg->msg_name size
This is a follow-up patch to f3d3342602f8bc ("net: rework recvmsg
handler msg_name and msg_namelen logic").
DECLARE_SOCKADDR validates that the structure we use for writing the
name information to is not larger than the buffer which is reserved
for msg->msg_name (which is 128 bytes). Also use DECLARE_SOCKADDR
consistently in sendmsg code paths.
Signed-off-by: Steffen Hurrle <steffen@hurrle.net>
Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 3d3141fd0580..77bd16fa9f34 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -902,7 +902,7 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, * Get and verify the address. */ if (msg->msg_name) { - struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_in *, usin, msg->msg_name); if (msg->msg_namelen < sizeof(*usin)) return -EINVAL; if (usin->sin_family != AF_INET) { @@ -1226,7 +1226,7 @@ int udp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t len, int noblock, int flags, int *addr_len) { struct inet_sock *inet = inet_sk(sk); - struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); struct sk_buff *skb; unsigned int ulen, copied; int peeked, off = 0; |