From: Patrick McHardy <kaber@trash.net>
Date: Mon, 13 Mar 2006 04:34:53 +0000 (-0800)
Subject: [TCP]: tcp_highspeed: fix AIMD table out-of-bounds access
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=4a1ff6e2bde56cdf176bd54d557b2e15e819f810;p=deliverable%2Flinux.git

[TCP]: tcp_highspeed: fix AIMD table out-of-bounds access

Covertiy #547

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c
index 63cf7e540847..e0e9d1383c7c 100644
--- a/net/ipv4/tcp_highspeed.c
+++ b/net/ipv4/tcp_highspeed.c
@@ -125,7 +125,7 @@ static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt,
 		/* Update AIMD parameters */
 		if (tp->snd_cwnd > hstcp_aimd_vals[ca->ai].cwnd) {
 			while (tp->snd_cwnd > hstcp_aimd_vals[ca->ai].cwnd &&
-			       ca->ai < HSTCP_AIMD_MAX)
+			       ca->ai < HSTCP_AIMD_MAX - 1)
 				ca->ai++;
 		} else if (tp->snd_cwnd < hstcp_aimd_vals[ca->ai].cwnd) {
 			while (tp->snd_cwnd > hstcp_aimd_vals[ca->ai].cwnd &&