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| author | Jonathan T. Leighton <jtleight@udel.edu> | 2017-02-12 17:26:06 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-14 12:13:51 -0500 |
| commit | ec5e3b0a1d41fbda0cc33a45bc9e54e91d9d12c7 (patch) | |
| tree | 073570df5576806b266c2fc101f88b5c50be564f /net | |
| parent | fed06ee89b78d3af32e235e0e89ad0d946fcb95d (diff) | |
| download | linux-0-day-ec5e3b0a1d41fbda0cc33a45bc9e54e91d9d12c7.tar.gz linux-0-day-ec5e3b0a1d41fbda0cc33a45bc9e54e91d9d12c7.tar.xz | |
ipv6: Inhibit IPv4-mapped src address on the wire.
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>
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 b6a94ff0bbd0d..e164684456df8 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1021,6 +1021,9 @@ 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; |