Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754274Ab2JNOmB (ORCPT ); Sun, 14 Oct 2012 10:42:01 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:46139 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754147Ab2JNOlx (ORCPT ); Sun, 14 Oct 2012 10:41:53 -0400 Message-Id: <20121014143552.971003867@decadent.org.uk> User-Agent: quilt/0.60-1 Date: Sun, 14 Oct 2012 15:37:55 +0100 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Jan Engelhardt , Pablo Neira Ayuso Subject: [ 142/147] netfilter: xt_limit: have r->cost != 0 case work In-Reply-To: <20121014143533.742627615@decadent.org.uk> X-SA-Exim-Connect-IP: 77.75.106.1 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1750 Lines: 48 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Engelhardt commit 82e6bfe2fbc4d48852114c4f979137cd5bf1d1a8 upstream. Commit v2.6.19-rc1~1272^2~41 tells us that r->cost != 0 can happen when a running state is saved to userspace and then reinstated from there. Make sure that private xt_limit area is initialized with correct values. Otherwise, random matchings due to use of uninitialized memory. Signed-off-by: Jan Engelhardt Signed-off-by: Pablo Neira Ayuso Signed-off-by: Ben Hutchings --- net/netfilter/xt_limit.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c index 5c22ce8..a4c1e45 100644 --- a/net/netfilter/xt_limit.c +++ b/net/netfilter/xt_limit.c @@ -117,11 +117,11 @@ static int limit_mt_check(const struct xt_mtchk_param *par) /* For SMP, we only want to use one set of state. */ r->master = priv; + /* User avg in seconds * XT_LIMIT_SCALE: convert to jiffies * + 128. */ + priv->prev = jiffies; + priv->credit = user2credits(r->avg * r->burst); /* Credits full. */ if (r->cost == 0) { - /* User avg in seconds * XT_LIMIT_SCALE: convert to jiffies * - 128. */ - priv->prev = jiffies; - priv->credit = user2credits(r->avg * r->burst); /* Credits full. */ r->credit_cap = priv->credit; /* Credits full. */ r->cost = user2credits(r->avg); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/