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| author | Gerhard Stenzel <gstenzel@linux.vnet.ibm.com> | 2014-08-22 23:34:16 +0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-10-17 11:43:13 +0400 |
| commit | bfe32d547264afb5d989d4890249326ba8ce5933 (patch) | |
| tree | d9fa8367909f8b9ab52de496eae52e4f5d19c4f1 /drivers/net/vxlan.c | |
| parent | ddc07cc3af29477df691ed5d87a52c867c0f9b23 (diff) | |
| download | linux-bfe32d547264afb5d989d4890249326ba8ce5933.tar.xz | |
vxlan: fix incorrect initializer in union vxlan_addr
[ Upstream commit a45e92a599e77ee6a850eabdd0141633fde03915 ]
The first initializer in the following
union vxlan_addr ipa = {
.sin.sin_addr.s_addr = tip,
.sa.sa_family = AF_INET,
};
is optimised away by the compiler, due to the second initializer,
therefore initialising .sin.sin_addr.s_addr always to 0.
This results in netlink messages indicating a L3 miss never contain the
missed IP address. This was observed with GCC 4.8 and 4.9. I do not know about previous versions.
The problem affects user space programs relying on an IP address being
sent as part of a netlink message indicating a L3 miss.
Changing
.sa.sa_family = AF_INET,
to
.sin.sin_family = AF_INET,
fixes the problem.
Signed-off-by: Gerhard Stenzel <gerhard.stenzel@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/net/vxlan.c')
| -rw-r--r-- | drivers/net/vxlan.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index aa2590a33754..f1735fb61362 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -1228,7 +1228,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb) } else if (vxlan->flags & VXLAN_F_L3MISS) { union vxlan_addr ipa = { .sin.sin_addr.s_addr = tip, - .sa.sa_family = AF_INET, + .sin.sin_family = AF_INET, }; vxlan_ip_miss(dev, &ipa); @@ -1389,7 +1389,7 @@ static int neigh_reduce(struct net_device *dev, struct sk_buff *skb) } else if (vxlan->flags & VXLAN_F_L3MISS) { union vxlan_addr ipa = { .sin6.sin6_addr = msg->target, - .sa.sa_family = AF_INET6, + .sin6.sin6_family = AF_INET6, }; vxlan_ip_miss(dev, &ipa); @@ -1422,7 +1422,7 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { union vxlan_addr ipa = { .sin.sin_addr.s_addr = pip->daddr, - .sa.sa_family = AF_INET, + .sin.sin_family = AF_INET, }; vxlan_ip_miss(dev, &ipa); @@ -1443,7 +1443,7 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) if (!n && (vxlan->flags & VXLAN_F_L3MISS)) { union vxlan_addr ipa = { .sin6.sin6_addr = pip6->daddr, - .sa.sa_family = AF_INET6, + .sin6.sin6_family = AF_INET6, }; vxlan_ip_miss(dev, &ipa); |