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pptp: verify sockaddr_len in pptp_bind() and pptp_connect()
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>
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@ -419,6 +419,9 @@ static int pptp_bind(struct socket *sock, struct sockaddr *uservaddr,
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struct pptp_opt *opt = &po->proto.pptp;
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int error = 0;
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if (sockaddr_len < sizeof(struct sockaddr_pppox))
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return -EINVAL;
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lock_sock(sk);
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opt->src_addr = sp->sa_addr.pptp;
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@ -440,6 +443,9 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr,
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struct flowi4 fl4;
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int error = 0;
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if (sockaddr_len < sizeof(struct sockaddr_pppox))
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return -EINVAL;
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if (sp->sa_protocol != PX_PROTO_PPTP)
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return -EINVAL;
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