Commit f779b2d6 authored by Zheng Yan's avatar Zheng Yan Committed by David S. Miller

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: default avatarZheng Yan <zheng.z.yan@intel.com>
Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e05c82d3
...@@ -1124,7 +1124,7 @@ static int tcp_is_sackblock_valid(struct tcp_sock *tp, int is_dsack, ...@@ -1124,7 +1124,7 @@ static int tcp_is_sackblock_valid(struct tcp_sock *tp, int is_dsack,
return 0; return 0;
/* ...Then it's D-SACK, and must reside below snd_una completely */ /* ...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; return 0;
if (!before(start_seq, tp->undo_marker)) if (!before(start_seq, tp->undo_marker))
......
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