commit 7843dd922e769bfadded963e59645a2e21e6fd34
Author: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
Date: Wed Jan 2 18:24:19 2008 +0100
[NETFILTER]: xt_pkttype: Add explicit check for IPv4
In the PACKET_LOOPBACK case, the skb data was always interpreted as
IPv4, but that is not valid for IPv6, obviously. Fix this by adding an
extra condition to check for AF_INET.
Signed-off-by: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
net/netfilter/xt_pkttype.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/net/netfilter/xt_pkttype.c b/net/netfilter/xt_pkttype.c
index 2762449..080f324 100644
--- a/net/netfilter/xt_pkttype.c
+++ b/net/netfilter/xt_pkttype.c
@@ -31,7 +31,8 @@ pkttype_mt(const struct sk_buff *skb, const struct net_device *in,
const struct xt_pkttype_info *info = matchinfo;
if (skb->pkt_type == PACKET_LOOPBACK)
- type = ipv4_is_multicast(ip_hdr(skb)->daddr)
+ type = match->family == AF_INET &&
+ ipv4_is_multicast(ip_hdr(skb)->daddr)
? PACKET_MULTICAST
: PACKET_BROADCAST;
else
-
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