diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2015-12-14 13:48:36 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-12-30 02:26:03 +0000 |
| commit | 1e44aafdd1181dd5e5b0638f9d3498b73c4d89e9 (patch) | |
| tree | 1684133d5ca4ec375e9a8b2e93beeae0182d58cb | |
| parent | 814a895e7373b5d71f60659d42e4f13ffdbc2e1c (diff) | |
pptp: verify sockaddr_len in pptp_bind() and pptp_connect()
[ Upstream commit 09ccfd238e5a0e670d8178cf50180ea81ae09ae1 ]
Reported-by: Dmitry Vyukov <dvyukov@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/net/ppp/pptp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c index c974581c8319..165ee14825b8 100644 --- a/drivers/net/ppp/pptp.c +++ b/drivers/net/ppp/pptp.c @@ -420,6 +420,9 @@ static int pptp_bind(struct socket *sock, struct sockaddr *uservaddr, struct pptp_opt *opt = &po->proto.pptp; int error = 0; + if (sockaddr_len < sizeof(struct sockaddr_pppox)) + return -EINVAL; + lock_sock(sk); opt->src_addr = sp->sa_addr.pptp; @@ -441,6 +444,9 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr, struct flowi4 fl4; int error = 0; + if (sockaddr_len < sizeof(struct sockaddr_pppox)) + return -EINVAL; + if (sp->sa_protocol != PX_PROTO_PPTP) return -EINVAL; |