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(parent: a56fc30) | patch
tcp: fix overflow in __tcp_retransmit_skb()
authorEric Dumazet <edumazet@google.com>
Thu, 15 Sep 2016 15:12:33 +0000 (08:12 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sat, 17 Sep 2016 13:59:30 +0000 (09:59 -0400)
commit83833efb010980c7ed49cdf1621234f445b36da3
tree63d82b7ef90a1d7346f6bc14737bf59334af998etree | snapshot
parenta56fc30d15d3fda7e7885099ea889bd1f7836e53commit | diff
tcp: fix overflow in __tcp_retransmit_skb()

If a TCP socket gets a large write queue, an overflow can happen
in a test in __tcp_retransmit_skb() preventing all retransmits.

The flow then stalls and resets after timeouts.

Tested:

sysctl -w net.core.wmem_max=1000000000
netperf -H dest -- -s 1000000000

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_output.c diff | blob | history
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