From 09ccfd238e5a0e670d8178cf50180ea81ae09ae1 Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Mon, 14 Dec 2015 13:48:36 -0800 Subject: [PATCH] pptp: verify sockaddr_len in pptp_bind() and pptp_connect() Reported-by: Dmitry Vyukov Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- drivers/net/ppp/pptp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c index fc69e41d0950..597c53e0a2ec 100644 --- a/drivers/net/ppp/pptp.c +++ b/drivers/net/ppp/pptp.c @@ -419,6 +419,9 @@ 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; @@ -440,6 +443,9 @@ 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; -- 2.20.1