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authorDan Carpenter <dan.carpenter@oracle.com>2013-01-23 20:38:34 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-27 19:31:03 -0500
commit75356a8143426a1301bc66c4fb920dcb1bd5e934 (patch)
tree70ca3cb89b3ab3f91a1fdcae97f3cbe46a67bdbe /net/ipv6/ip6mr.c
parentce11ff5e5963e441feb591e76278528f876c332d (diff)
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 <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6mr.c')
-rw-r--r--net/ipv6/ip6mr.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 26dcdec9e3a..8fd154e5f07 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;