diff options
| author | Eric Dumazet <edumazet@google.com> | 2012-11-25 10:41:45 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-26 01:34:16 +0400 |
| commit | 5e1859fbcc3ccdd56d528df91d7b6f70e73d6b82 (patch) | |
| tree | efa1ce9061f7bcf8280159c9d2612221279766d3 /net/ipv4/ipmr.c | |
| parent | 11e980299f922884377c7ce5d8c331327c5c3fd6 (diff) | |
| download | linux-5e1859fbcc3ccdd56d528df91d7b6f70e73d6b82.tar.xz | |
ipv4: ipmr: various fixes and cleanups
1) ip_mroute_setsockopt() & ip_mroute_getsockopt() should not
access/set raw_sk(sk)->ipmr_table before making sure the socket
is a raw socket, and protocol is IGMP
2) MRT_INIT should return -EINVAL if optlen != sizeof(int), not
-ENOPROTOOPT
3) MRT_ASSERT & MRT_PIM should validate optlen
4) " (v) ? 1 : 0 " can be written as " !!v "
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipmr.c')
| -rw-r--r-- | net/ipv4/ipmr.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index adf3d349566f..0394a8e6d978 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -1207,6 +1207,10 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi struct net *net = sock_net(sk); struct mr_table *mrt; + if (sk->sk_type != SOCK_RAW || + inet_sk(sk)->inet_num != IPPROTO_IGMP) + return -EOPNOTSUPP; + mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); if (mrt == NULL) return -ENOENT; @@ -1219,11 +1223,8 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi switch (optname) { case MRT_INIT: - if (sk->sk_type != SOCK_RAW || - inet_sk(sk)->inet_num != IPPROTO_IGMP) - return -EOPNOTSUPP; if (optlen != sizeof(int)) - return -ENOPROTOOPT; + return -EINVAL; rtnl_lock(); if (rtnl_dereference(mrt->mroute_sk)) { @@ -1284,9 +1285,11 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi case MRT_ASSERT: { int v; + if (optlen != sizeof(v)) + return -EINVAL; if (get_user(v, (int __user *)optval)) return -EFAULT; - mrt->mroute_do_assert = (v) ? 1 : 0; + mrt->mroute_do_assert = !!v; return 0; } #ifdef CONFIG_IP_PIMSM @@ -1294,9 +1297,11 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi { int v; + if (optlen != sizeof(v)) + return -EINVAL; if (get_user(v, (int __user *)optval)) return -EFAULT; - v = (v) ? 1 : 0; + v = !!v; rtnl_lock(); ret = 0; @@ -1325,7 +1330,8 @@ int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsi } else { if (!ipmr_new_table(net, v)) ret = -ENOMEM; - raw_sk(sk)->ipmr_table = v; + else + raw_sk(sk)->ipmr_table = v; } rtnl_unlock(); return ret; @@ -1351,6 +1357,10 @@ int ip_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int struct net *net = sock_net(sk); struct mr_table *mrt; + if (sk->sk_type != SOCK_RAW || + inet_sk(sk)->inet_num != IPPROTO_IGMP) + return -EOPNOTSUPP; + mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT); if (mrt == NULL) return -ENOENT; |