| From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 010/108] pptp: verify sockaddr_len in pptp_bind() and pptp_connect() | Date | Fri, 22 Jan 2016 15:28:23 -0800 |
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3.13.11-ckt33 -stable review patch. If anyone has any objections, please let me know.
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From: WANG Cong <xiyou.wangcong@gmail.com>
[ 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: Kamal Mostafa <kamal@canonical.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 1dc628f..0710214 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; -- 1.9.1
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