diff options
| author | Douglas Caetano dos Santos <douglascs@taghos.com.br> | 2016-09-22 15:52:04 -0300 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:37 +0200 |
| commit | 71f4c31adf71752a25db9faeec577cfabad45b78 (patch) | |
| tree | 74552015bbb57cf582dac5ec96d8654677934231 /include/linux | |
| parent | 6f547cc2652bdef0ac054046f877316805a21574 (diff) | |
tcp: fix wrong checksum calculation on MTU probing
commit 2fe664f1fcf7c4da6891f95708a7a56d3c024354 upstream.
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>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions