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authorShan Wei <shanwei@cn.fujitsu.com>2008-06-10 09:50:55 +0200
committerYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2008-06-12 02:19:08 +0200
commite8766fc86b34d44a8c55a2f9d71da69e091b1ca4 (patch)
treec96952c8a6250c48036adcf51c6ef0bcc8d8c770 /net/ipv6
parentipv6 route: Fix route lifetime in netlink message. (diff)
downloadlinux-e8766fc86b34d44a8c55a2f9d71da69e091b1ca4.tar.xz
linux-e8766fc86b34d44a8c55a2f9d71da69e091b1ca4.zip
ipv6: Check the hop limit setting in ancillary data.
When specifing the outgoing hop limit as ancillary data for sendmsg(), the kernel doesn't check the integer hop limit value as specified in [RFC-3542] section 6.3. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/datagram.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index b9c2de84a8a2..0f0f94a40335 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -705,6 +705,11 @@ int datagram_send_ctl(struct net *net,
}
*hlimit = *(int *)CMSG_DATA(cmsg);
+ if (*hlimit < -1 || *hlimit > 0xff) {
+ err = -EINVAL;
+ goto exit_f;
+ }
+
break;
case IPV6_TCLASS: