lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 12 May 2014 02:32:05 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Julian Anastasov <ja@....bg>, Simon Horman <horms@...ge.net.au>,
	Willy Tarreau <w@....eu>
Subject: [ 005/143] ipvs: fix CHECKSUM_PARTIAL for TCP, UDP

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Julian Anastasov <ja@....bg>

 	Fix CHECKSUM_PARTIAL handling. Tested for IPv4 TCP,
UDP not tested because it needs network card with HW CSUM support.
May be fixes problem where IPVS can not be used in virtual boxes.
Problem appears with DNAT to local address when the local stack
sends reply in CHECKSUM_PARTIAL mode.

 	Fix tcp_dnat_handler and udp_dnat_handler to provide
vaddr and daddr in right order (old and new IP) when calling
tcp_partial_csum_update/udp_partial_csum_update (CHECKSUM_PARTIAL).

Signed-off-by: Julian Anastasov <ja@....bg>
Signed-off-by: Simon Horman <horms@...ge.net.au>
(cherry picked from commit 5bc9068e9d962ca6b8bec3f0eb6f60ab4dee1d04)
Signed-off-by: Willy Tarreau <w@....eu>
---
 net/netfilter/ipvs/ip_vs_proto_tcp.c | 10 +++++-----
 net/netfilter/ipvs/ip_vs_proto_udp.c | 10 +++++-----
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/net/netfilter/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c
index 91d28e0..d462b0d 100644
--- a/net/netfilter/ipvs/ip_vs_proto_tcp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c
@@ -147,15 +147,15 @@ tcp_partial_csum_update(int af, struct tcphdr *tcph,
 #ifdef CONFIG_IP_VS_IPV6
 	if (af == AF_INET6)
 		tcph->check =
-			csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
+			~csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
 					 ip_vs_check_diff2(oldlen, newlen,
-						~csum_unfold(tcph->check))));
+						csum_unfold(tcph->check))));
 	else
 #endif
 	tcph->check =
-		csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
+		~csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
 				ip_vs_check_diff2(oldlen, newlen,
-						~csum_unfold(tcph->check))));
+						csum_unfold(tcph->check))));
 }
 
 
@@ -269,7 +269,7 @@ tcp_dnat_handler(struct sk_buff *skb,
 	 *	Adjust TCP checksums
 	 */
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		tcp_partial_csum_update(cp->af, tcph, &cp->daddr, &cp->vaddr,
+		tcp_partial_csum_update(cp->af, tcph, &cp->vaddr, &cp->daddr,
 					htons(oldlen),
 					htons(skb->len - tcphoff));
 	} else if (!cp->app) {
diff --git a/net/netfilter/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c
index e7a6885..c1781f5 100644
--- a/net/netfilter/ipvs/ip_vs_proto_udp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_udp.c
@@ -154,15 +154,15 @@ udp_partial_csum_update(int af, struct udphdr *uhdr,
 #ifdef CONFIG_IP_VS_IPV6
 	if (af == AF_INET6)
 		uhdr->check =
-			csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
+			~csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
 					 ip_vs_check_diff2(oldlen, newlen,
-						~csum_unfold(uhdr->check))));
+						csum_unfold(uhdr->check))));
 	else
 #endif
 	uhdr->check =
-		csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
+		~csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
 				ip_vs_check_diff2(oldlen, newlen,
-						~csum_unfold(uhdr->check))));
+						csum_unfold(uhdr->check))));
 }
 
 
@@ -205,7 +205,7 @@ udp_snat_handler(struct sk_buff *skb,
 	 *	Adjust UDP checksums
 	 */
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		udp_partial_csum_update(cp->af, udph, &cp->daddr, &cp->vaddr,
+		udp_partial_csum_update(cp->af, udph, &cp->vaddr, &cp->daddr,
 					htons(oldlen),
 					htons(skb->len - udphoff));
 	} else if (!cp->app && (udph->check != 0)) {
-- 
1.7.12.2.21.g234cd45.dirty



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists