From: Dan Carpenter <dan.carpenter@oracle.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
James Morris <jmorris@namei.org>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Patrick McHardy <kaber@trash.net>,
netdev@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] ip6mr: limit IPv6 MRT_TABLE identifiers
Date: Thu, 24 Jan 2013 09:38:34 +0300 [thread overview]
Message-ID: <20130124063834.GA5611@elgon.mountain> (raw)
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>
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index acc3249..351ce98 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1766,6 +1766,9 @@ 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;
next reply other threads:[~2013-01-24 6:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-24 6:38 Dan Carpenter [this message]
2013-01-24 8:22 ` [patch] ip6mr: limit IPv6 MRT_TABLE identifiers walter harms
2013-01-24 9:01 ` Dan Carpenter
2013-01-28 0:31 ` David Miller
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