diff options
| author | Susant Sahani <susant@redhat.com> | 2014-05-10 00:11:32 +0530 |
|---|---|---|
| committer | Show Liu <show.liu@linaro.org> | 2014-06-18 12:04:00 +0800 |
| commit | fd40eb3330d502968f12f497a738817d3ee3bfc0 (patch) | |
| tree | 2d5bdd548b25627dd1d869c27e9afb4918985f9f /net | |
| parent | 35df54ed03ff55275fc019d6986717d3b6c86cb7 (diff) | |
ip6_tunnel: fix potential NULL pointer dereference
[ Upstream commit c8965932a2e3b70197ec02c6741c29460279e2a8 ]
The function ip6_tnl_validate assumes that the rtnl
attribute IFLA_IPTUN_PROTO always be filled . If this
attribute is not filled by the userspace application
kernel get crashed with NULL pointer dereference. This
patch fixes the potential kernel crash when
IFLA_IPTUN_PROTO is missing .
Signed-off-by: Susant Sahani <susant@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/ip6_tunnel.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 5db8d310f9c..0e51f68ab16 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1564,7 +1564,7 @@ static int ip6_tnl_validate(struct nlattr *tb[], struct nlattr *data[]) { u8 proto; - if (!data) + if (!data || !data[IFLA_IPTUN_PROTO]) return 0; proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); |