diff options
| author | Eric Dumazet <edumazet@google.com> | 2019-06-21 06:09:55 -0700 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-09-06 15:49:42 +0800 |
| commit | c42ff4a975161b0f46b36193f4f39be74a943b64 (patch) | |
| tree | d816412d732c735ccac61bbbbe710d6fce5b64ee /net | |
| parent | d0bd91bf28f2116a6c653e8be74e3fa63d1e1920 (diff) | |
tcp: refine memory limit test in tcp_fragment()
commit b6653b3629e5b88202be3c9abc44713973f5c4b4 upstream.
tcp_fragment() might be called for skbs in the write queue.
Memory limits might have been exceeded because tcp_sendmsg() only
checks limits at full skb (64KB) boundaries.
Therefore, we need to make sure tcp_fragment() wont punish applications
that might have setup very low SO_SNDBUF values.
Fixes: f070ef2ac667 ("tcp: tcp_fragment() should apply sane memory limits")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Christoph Paasch <cpaasch@apple.com>
Tested-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 1bc13903773bc9418a8f898c462eef64b7fa1d52)
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_output.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index a8772e11dc1c..a5960b9b6741 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -1274,7 +1274,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, if (nsize < 0) nsize = 0; - if (unlikely((sk->sk_wmem_queued >> 1) > sk->sk_sndbuf)) { + if (unlikely((sk->sk_wmem_queued >> 1) > sk->sk_sndbuf + 0x20000)) { NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPWQUEUETOOBIG); return -ENOMEM; } |