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authorDouglas Caetano dos Santos <douglascs@taghos.com.br>2016-09-22 15:52:04 -0300
committerDavid S. Miller <davem@davemloft.net>2016-09-23 07:55:02 -0400
commit2fe664f1fcf7c4da6891f95708a7a56d3c024354 (patch)
tree44bf1c6e889204e43ae18c85be64e0713d451782 /net/ipv4/tcp_input.c
parentf44ace4d06aab8210d29c731f70b657a7524198b (diff)
downloadlinux-stericsson-2fe664f1fcf7c4da6891f95708a7a56d3c024354.tar.gz
tcp: fix wrong checksum calculation on MTU probing
With TCP MTU probing enabled and offload TX checksumming disabled, tcp_mtu_probe() calculated the wrong checksum when a fragment being copied into the probe's SKB had an odd length. This was caused by the direct use of skb_copy_and_csum_bits() to calculate the checksum, as it pads the fragment being copied, if needed. When this fragment was not the last, a subsequent call used the previous checksum without considering this padding. The effect was a stale connection in one way, as even retransmissions wouldn't solve the problem, because the checksum was never recalculated for the full SKB length. Signed-off-by: Douglas Caetano dos Santos <douglascs@taghos.com.br> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
0 files changed, 0 insertions, 0 deletions