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nexthop: Fix attribute checking for groups

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[ Upstream commit 84be69b869a5a496a6cfde9b3c29509207a1f1fa ]

For nexthop groups, attributes after NHA_GROUP_TYPE are invalid, but
nh_check_attr_group starts checking at NHA_GROUP. The group type defaults
to multipath and the NHA_GROUP_TYPE is currently optional so this has
slipped through so far. Fix the attribute checking to handle support of
new group types.

Fixes: 430a049190de ("nexthop: Add support for nexthop groups")
Signed-off-by: ASSOGBA Emery <assogba.emery@gmail.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Ahern 2020-05-17 11:26:32 -06:00 committed by Greg Kroah-Hartman
parent cf4cc95a15
commit 983fa2e774
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/nexthop.c
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@ -435,7 +435,7 @@ static int nh_check_attr_group(struct net *net, struct nlattr *tb[],
if (!valid_group_nh(nh, len, extack))
return -EINVAL;
}
for (i = NHA_GROUP + 1; i < __NHA_MAX; ++i) {
for (i = NHA_GROUP_TYPE + 1; i < __NHA_MAX; ++i) {
if (!tb[i])
continue;