tcp: improve check for invalid sack blocks

Change-Id: Ic6a6202a2d5aca33eee7fc6ff8eeaa1db9b58525
Signed-off-by: Florin Coras <fcoras@cisco.com>

diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 0e91550..dff1802 100644 (file)
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -905,7 +905,9 @@ tcp_rcv_sacks (tcp_connection_t * tc, u32 ack)
     {
       if (seq_lt (blk->start, blk->end)
          && seq_gt (blk->start, tc->snd_una)
-         && seq_gt (blk->start, ack) && seq_leq (blk->end, tc->snd_una_max))
+         && seq_gt (blk->start, ack)
+         && seq_lt (blk->start, tc->snd_una_max)
+         && seq_leq (blk->end, tc->snd_una_max))
        {
          blk++;
          continue;