tcp: fix overflow in __tcp_retransmit_skb()

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[ Upstream commit ffb4d6c850 ]

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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Eric Dumazet 2016-09-15 08:12:33 -07:00 • committed by Ben Hutchings

parent 8d7c2ffcd4

commit 7bf2abbcd2

1 changed files with 2 additions and 1 deletions

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net/ipv4/tcp_output.c

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