diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2015-12-14 13:48:36 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-22 20:54:14 -0800 |
| commit | f167b6f4244fbc8d05fcc385b1bf8e70729c9e7c (patch) | |
| tree | 61e8fb14b2fac1caacc243a6798ecbb2ea923cb6 | |
| parent | 2dea635ac36ee66cae8a9c001694d0b72dd1d939 (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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 e3bfbd4d0136..0bacabfa486e 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; |