diff options
| author | Jonathan T. Leighton <jtleight@udel.edu> | 2017-05-23 21:53:34 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 06:39:35 +0200 |
| commit | 23287661af3e2fd5a6a5a7bbe2b8f066203456e0 (patch) | |
| tree | b67bb43caa1f175a68a8d205bc0dae400242a368 /net | |
| parent | 8faccb2b944215e1ecb86989f22113db267397c5 (diff) | |
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 1db17efe36c1..19c0d67ce8c4 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1004,6 +1004,9 @@ 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; |