[Feature][ZXW-65]merged P49 base code
Change-Id: I3e09c0c3d47483bc645f02310380ecb7fc6f4041
diff --git a/ap/os/linux/linux-3.4.x/net/ipv4/tcp.c b/ap/os/linux/linux-3.4.x/net/ipv4/tcp.c
index a18ff4e..82bb0e7 100755
--- a/ap/os/linux/linux-3.4.x/net/ipv4/tcp.c
+++ b/ap/os/linux/linux-3.4.x/net/ipv4/tcp.c
@@ -2174,6 +2174,10 @@
tcp_set_ca_state(sk, TCP_CA_Open);
tcp_clear_retrans(tp);
inet_csk_delack_init(sk);
+ /* Initialize rcv_mss to TCP_MIN_MSS to avoid division by 0
+ * issue in __tcp_select_window()
+ */
+ icsk->icsk_ack.rcv_mss = TCP_MIN_MSS; //CVE-2017-14106(BDSA-2017-1152)
tcp_init_send_head(sk);
memset(&tp->rx_opt, 0, sizeof(tp->rx_opt));
__sk_dst_reset(sk);