Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754353Ab2JNOmJ (ORCPT ); Sun, 14 Oct 2012 10:42:09 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:46163 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754280Ab2JNOmF (ORCPT ); Sun, 14 Oct 2012 10:42:05 -0400 Message-Id: <20121014143552.433957217@decadent.org.uk> User-Agent: quilt/0.60-1 Date: Sun, 14 Oct 2012 15:37:51 +0100 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Patrick McHardy , Pablo Neira Ayuso Subject: [ 138/147] netfilter: nf_nat_sip: fix via header translation with multiple parameters 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: 2032 Lines: 55 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Patrick McHardy commit f22eb25cf5b1157b29ef88c793b71972efc47143 upstream. Via-headers are parsed beginning at the first character after the Via-address. When the address is translated first and its length decreases, the offset to start parsing at is incorrect and header parameters might be missed. Update the offset after translating the Via-address to fix this. Signed-off-by: Patrick McHardy Signed-off-by: Pablo Neira Ayuso Signed-off-by: Ben Hutchings --- net/ipv4/netfilter/nf_nat_sip.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/net/ipv4/netfilter/nf_nat_sip.c b/net/ipv4/netfilter/nf_nat_sip.c index eef8f29..4ad9cf1 100644 --- a/net/ipv4/netfilter/nf_nat_sip.c +++ b/net/ipv4/netfilter/nf_nat_sip.c @@ -148,7 +148,7 @@ static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff, if (ct_sip_parse_header_uri(ct, *dptr, NULL, *datalen, hdr, NULL, &matchoff, &matchlen, &addr, &port) > 0) { - unsigned int matchend, poff, plen, buflen, n; + unsigned int olen, matchend, poff, plen, buflen, n; char buffer[sizeof("nnn.nnn.nnn.nnn:nnnnn")]; /* We're only interested in headers related to this @@ -163,11 +163,12 @@ static unsigned int ip_nat_sip(struct sk_buff *skb, unsigned int dataoff, goto next; } + olen = *datalen; if (!map_addr(skb, dataoff, dptr, datalen, matchoff, matchlen, &addr, port)) return NF_DROP; - matchend = matchoff + matchlen; + matchend = matchoff + matchlen + *datalen - olen; /* The maddr= parameter (RFC 2361) specifies where to send * the reply. */ -- 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/