tcp: fix tcp fin memory accounting
authorJosh Hunt <johunt@akamai.com>
Thu, 19 Mar 2015 23:19:30 +0000 (19:19 -0400)
committerDavid S. Miller <davem@davemloft.net>
Fri, 20 Mar 2015 17:18:52 +0000 (13:18 -0400)
commitd22e1537181188e5dc8cbc51451832625035bdc2
treeb207b5f9b1562e4f1c6f5a97cb09cabb88ca9fea
parent73ba57bfae4a1914f6a6dac71e3168dd900e00af
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>
net/ipv4/tcp_output.c