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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 /drivers/isdn | |
| 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 'drivers/isdn')
| -rw-r--r-- | drivers/isdn/mISDN/socket.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c index 5cefb479c707..1be82284cf9d 100644 --- a/drivers/isdn/mISDN/socket.c +++ b/drivers/isdn/mISDN/socket.c @@ -135,7 +135,7 @@ mISDN_sock_recvmsg(struct kiocb *iocb, struct socket *sock, return err; if (msg->msg_name) { - struct sockaddr_mISDN *maddr = msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name); maddr->family = AF_ISDN; maddr->dev = _pms(sk)->dev->id; @@ -179,7 +179,6 @@ mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct sock *sk = sock->sk; struct sk_buff *skb; int err = -ENOMEM; - struct sockaddr_mISDN *maddr; if (*debug & DEBUG_SOCKET) printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n", @@ -214,7 +213,7 @@ mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock, if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) { /* if we have a address, we use it */ - maddr = (struct sockaddr_mISDN *)msg->msg_name; + DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name); mISDN_HEAD_ID(skb) = maddr->channel; } else { /* use default for L2 messages */ if ((sk->sk_protocol == ISDN_P_LAPD_TE) || |