From: David Ahern dsahern@kernel.org
commit 1ff15a710a862db1101b97810af14aedc835a86a upstream.
Make sure RTA_GATEWAY for IPv6 multipath route has enough bytes to hold an IPv6 address.
Fixes: 6b9ea5a64ed5 ("ipv6: fix multipath route replace error recovery") Signed-off-by: David Ahern dsahern@kernel.org Cc: Roopa Prabhu roopa@nvidia.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv6/route.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5342,7 +5342,11 @@ static int ip6_route_multipath_del(struc
nla = nla_find(attrs, attrlen, RTA_GATEWAY); if (nla) { - nla_memcpy(&r_cfg.fc_gateway, nla, 16); + err = fib6_gw_from_attr(&r_cfg.fc_gateway, nla, + extack); + if (err) + return err; + r_cfg.fc_flags |= RTF_GATEWAY; } }