From 75356a8143426a1301bc66c4fb920dcb1bd5e934 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Wed, 23 Jan 2013 20:38:34 +0000 Subject: [PATCH] ip6mr: limit IPv6 MRT_TABLE identifiers We did this for IPv4 in b49d3c1e1c "net: ipmr: limit MRT_TABLE identifiers" but we need to do it for IPv6 as well. On IPv6 the name is "pim6reg" instead of "pimreg" so there is one less digit allowed. The strcpy() is in ip6mr_reg_vif(). Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller --- net/ipv6/ip6mr.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 26dcdec9e3a5..8fd154e5f079 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -1710,6 +1710,9 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns return -EINVAL; if (get_user(v, (u32 __user *)optval)) return -EFAULT; + /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */ + if (v != RT_TABLE_DEFAULT && v >= 100000000) + return -EINVAL; if (sk == mrt->mroute6_sk) return -EBUSY;