From: Eric Dumazet Date: Mon, 23 Apr 2018 01:29:23 +0000 (-0700) Subject: ipv6: add RTA_TABLE and RTA_PREFSRC to rtm_ipv6_policy X-Git-Tag: v3.18.107~3 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f4dd54821e6331dacf886a7e4fa5cec73b84ed95;p=thirdparty%2Fkernel%2Fstable.git ipv6: add RTA_TABLE and RTA_PREFSRC to rtm_ipv6_policy [ Upstream commit aa8f8778493c85fff480cdf8b349b1e1dcb5f243 ] KMSAN reported use of uninit-value that I tracked to lack of proper size check on RTA_TABLE attribute. I also believe RTA_PREFSRC lacks a similar check. Fixes: 86872cb57925 ("[IPv6] route: FIB6 configuration using struct fib6_config") Fixes: c3968a857a6b ("ipv6: RTA_PREFSRC support for ipv6 route source address selection") Signed-off-by: Eric Dumazet Reported-by: syzbot Acked-by: David Ahern Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 168e40d98ccee..82bf2c4ebdb28 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2333,11 +2333,13 @@ void rt6_mtu_change(struct net_device *dev, unsigned int mtu) static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, + [RTA_PREFSRC] = { .len = sizeof(struct in6_addr) }, [RTA_OIF] = { .type = NLA_U32 }, [RTA_IIF] = { .type = NLA_U32 }, [RTA_PRIORITY] = { .type = NLA_U32 }, [RTA_METRICS] = { .type = NLA_NESTED }, [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, + [RTA_TABLE] = { .type = NLA_U32 }, }; static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,