netdev - [PATCHv3 net] openvswitch: Don't validate IPv6 label masks.

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-next>] [day] [month] [year] [list]

Message-Id: <1416434089-47062-1-git-send-email-joestringer@nicira.com>
Date:	Wed, 19 Nov 2014 13:54:49 -0800
From:	Joe Stringer <joestringer@...ira.com>
To:	netdev@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, pshelar@...ira.com,
	dev@...nvswitch.org
Subject: [PATCHv3 net] openvswitch: Don't validate IPv6 label masks.

When userspace doesn't provide a mask, OVS datapath generates a fully
unwildcarded mask for the flow by copying the flow and setting all bits
in all fields. For IPv6 label, this creates a mask that matches on the
upper 12 bits, causing the following error:

openvswitch: netlink: Invalid IPv6 flow label value (value=ffffffff, max=fffff)

This patch ignores the label validation check for masks, avoiding this
error.

Signed-off-by: Joe Stringer <joestringer@...ira.com>
---
v3: Alternative approach.
    Was "openvswitch: Fix mask generation for IPv6 labels."
v2: OR lower 20 bits (upper 12 bits remain from earlier memdup)
---
 net/openvswitch/flow_netlink.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index fa4ec2e..089b195 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -690,7 +690,7 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
 			return -EINVAL;
 		}
 
-		if (ipv6_key->ipv6_label & htonl(0xFFF00000)) {
+		if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
 			OVS_NLERR("IPv6 flow label %x is out of range (max=%x).\n",
 				  ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
 			return -EINVAL;
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html