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| author | Josh Hunt <johunt@akamai.com> | 2015-03-19 19:19:30 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-20 13:18:52 -0400 |
| commit | d22e1537181188e5dc8cbc51451832625035bdc2 (patch) | |
| tree | b207b5f9b1562e4f1c6f5a97cb09cabb88ca9fea /net | |
| parent | 73ba57bfae4a1914f6a6dac71e3168dd900e00af (diff) | |
| download | linux-d22e1537181188e5dc8cbc51451832625035bdc2.tar.gz linux-d22e1537181188e5dc8cbc51451832625035bdc2.tar.bz2 linux-d22e1537181188e5dc8cbc51451832625035bdc2.zip | |
tcp: fix tcp fin memory accounting
tcp_send_fin() does not account for the memory it allocates properly, so
sk_forward_alloc can be negative in cases where we've sent a FIN:
ss example output (ss -amn | grep -B1 f4294):
tcp FIN-WAIT-1 0 1 192.168.0.1:45520 192.0.2.1:8080
skmem:(r0,rb87380,t0,tb87380,f4294966016,w1280,o0,bl0)
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_output.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index a2a796c5536b..1db253e36045 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2773,15 +2773,11 @@ void tcp_send_fin(struct sock *sk) } else { /* Socket is locked, keep trying until memory is available. */ for (;;) { - skb = alloc_skb_fclone(MAX_TCP_HEADER, - sk->sk_allocation); + skb = sk_stream_alloc_skb(sk, 0, sk->sk_allocation); if (skb) break; yield(); } - - /* Reserve space for headers and prepare control bits. */ - skb_reserve(skb, MAX_TCP_HEADER); /* FIN eats a sequence byte, write_seq advanced by tcp_queue_skb(). */ tcp_init_nondata_skb(skb, tp->write_seq, TCPHDR_ACK | TCPHDR_FIN); |