From f779b2d60ab95c17f1e025778ed0df3ec2f05d75 Mon Sep 17 00:00:00 2001 From: Zheng Yan Date: Sun, 18 Sep 2011 22:37:34 -0400 Subject: [PATCH] tcp: fix validation of D-SACK 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 Acked-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/tcp_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index ea0d2183df4..21fab3edb92 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -1124,7 +1124,7 @@ static int tcp_is_sackblock_valid(struct tcp_sock *tp, int is_dsack, 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)) -- 2.20.1