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net: add build-time checks for msg->msg_name size

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This is a follow-up patch to f3d3342602 ("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>
This commit is contained in:
Steffen Hurrle
2014-01-17 22:53:15 +01:00
committed by David S. Miller
parent ea02f9411d
commit 342dfc306f
34 changed files with 68 additions and 78 deletions
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4
net/rxrpc/ar-output.c
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@@ -152,8 +152,8 @@ int rxrpc_client_sendmsg(struct kiocb *iocb, struct rxrpc_sock *rx,
if (trans) {
service_id = rx->service_id;
if (msg->msg_name) {
struct sockaddr_rxrpc *srx =
(struct sockaddr_rxrpc *) msg->msg_name;
DECLARE_SOCKADDR(struct sockaddr_rxrpc *, srx,
msg->msg_name);
service_id = htons(srx->srx_service);
}
key = rx->key;