Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

[thirdparty/kernel/linux.git] / net / ipv4 / tcp_output.c

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 0c4ed66dc1bf3441a9b7e5c9c37692333c92f17c..00c01a01b547ec67c971dc25a74c9258563cf871 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * INET                An implementation of the TCP/IP protocol suite for the LINUX
  *             operating system.  INET is implemented using the  BSD Socket
@@ -1295,6 +1296,11 @@ int tcp_fragment(struct sock *sk, enum tcp_queue tcp_queue,
        if (nsize < 0)
                nsize = 0;
 
+       if (unlikely((sk->sk_wmem_queued >> 1) > sk->sk_sndbuf)) {
+               NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPWQUEUETOOBIG);
+               return -ENOMEM;
+       }
+
        if (skb_unclone(skb, gfp))
                return -ENOMEM;
 
@@ -1453,8 +1459,7 @@ static inline int __tcp_mtu_to_mss(struct sock *sk, int pmtu)
        mss_now -= icsk->icsk_ext_hdr_len;
 
        /* Then reserve room for full set of TCP options and 8 bytes of data */
-       if (mss_now < 48)
-               mss_now = 48;
+       mss_now = max(mss_now, sock_net(sk)->ipv4.sysctl_tcp_min_snd_mss);
        return mss_now;
 }
 
@@ -2746,7 +2751,7 @@ static bool tcp_collapse_retrans(struct sock *sk, struct sk_buff *skb)
                if (next_skb_size <= skb_availroom(skb))
                        skb_copy_bits(next_skb, 0, skb_put(skb, next_skb_size),
                                      next_skb_size);
-               else if (!skb_shift(skb, next_skb, next_skb_size))
+               else if (!tcp_skb_shift(skb, next_skb, 1, next_skb_size))
                        return false;
        }
        tcp_highest_sack_replace(sk, next_skb, skb);