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| author | Jonathan T. Leighton <jtleight@udel.edu> | 2017-05-24 01:53:34 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 04:41:49 (GMT) |
| commit | cb351da6f2badf45d87cf0d21826d81a77f5e433 (patch) | |
| tree | 5bceb0a4f157357e9375b8f24310effc2344c328 /net | |
| parent | 12ec2560d467812424ff8eb6f7fccc83f64aae3d (diff) | |
| download | linux-cb351da6f2badf45d87cf0d21826d81a77f5e433.tar.xz | |
ipv6: Inhibit IPv4-mapped src address on the wire.
[ Upstream commit ec5e3b0a1d41fbda0cc33a45bc9e54e91d9d12c7 ]
This patch adds a check for the problematic case of an IPv4-mapped IPv6
source address and a destination address that is neither an IPv4-mapped
IPv6 address nor in6addr_any, and returns an appropriate error. The
check in done before returning from looking up the route.
Signed-off-by: Jonathan T. Leighton <jtleight@udel.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/ip6_output.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 1ac3cea..3ab32ac 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1019,6 +1019,9 @@ static int ip6_dst_lookup_tail(struct net *net, const struct sock *sk, } } #endif + if (ipv6_addr_v4mapped(&fl6->saddr) && + !(ipv6_addr_v4mapped(&fl6->daddr) || ipv6_addr_any(&fl6->daddr))) + return -EAFNOSUPPORT; return 0; |