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| author | Steffen Hurrle <steffen@hurrle.net> | 2014-01-17 22:53:15 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-18 23:04:16 -0800 |
| commit | 342dfc306fb32155314dad277f3c3686b83fb9f1 (patch) | |
| tree | a0d220f9310725c72bac70945261c9282e7cf305 /net/llc/af_llc.c | |
| parent | ea02f9411d9faa3553ed09ce0ec9f00ceae9885e (diff) | |
| download | linux-342dfc306fb32155314dad277f3c3686b83fb9f1.tar.gz linux-342dfc306fb32155314dad277f3c3686b83fb9f1.tar.bz2 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/llc/af_llc.c')
| -rw-r--r-- | net/llc/af_llc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c index c71b699eb555..0080d2b0a8ae 100644 --- a/net/llc/af_llc.c +++ b/net/llc/af_llc.c @@ -707,7 +707,7 @@ out: static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) { - struct sockaddr_llc *uaddr = (struct sockaddr_llc *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_llc *, uaddr, msg->msg_name); const int nonblock = flags & MSG_DONTWAIT; struct sk_buff *skb = NULL; struct sock *sk = sock->sk; @@ -884,7 +884,7 @@ static int llc_ui_sendmsg(struct kiocb *iocb, struct socket *sock, { struct sock *sk = sock->sk; struct llc_sock *llc = llc_sk(sk); - struct sockaddr_llc *addr = (struct sockaddr_llc *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_llc *, addr, msg->msg_name); int flags = msg->msg_flags; int noblock = flags & MSG_DONTWAIT; struct sk_buff *skb; |