| Date | Wed, 28 Sep 2011 15:02:29 -0700 | From | Greg KH <> | Subject | [185/244] tcp: fix validation of D-SACK |
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3.0-stable review patch. If anyone has any objections, please let us know.
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From: Zheng Yan <zheng.z.yan@intel.com>
[ Upstream commit f779b2d60ab95c17f1e025778ed0df3ec2f05d75 ]
D-SACK is allowed to reside below snd_una. But the corresponding check in tcp_is_sackblock_valid() is the exact opposite. It looks like a typo.
Signed-off-by: Zheng Yan <zheng.z.yan@intel.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- net/ipv4/tcp_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -1115,7 +1115,7 @@ static int tcp_is_sackblock_valid(struct return 0; /* ...Then it's D-SACK, and must reside below snd_una completely */ - if (!after(end_seq, tp->snd_una)) + if (after(end_seq, tp->snd_una)) return 0; if (!before(start_seq, tp->undo_marker))
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