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Date: Mon, 14 Dec 2015 13:48:36 -0800 From: Cong Wang <xiyou.wangcong@...il.com> To: netdev@...r.kernel.org Cc: dvyukov@...il.com, Cong Wang <xiyou.wangcong@...il.com> Subject: [Patch net] pptp: verify sockaddr_len in pptp_bind() and pptp_connect() Reported-by: Dmitry Vyukov <dvyukov@...il.com> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com> --- 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 fc69e41..597c53e 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; -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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