| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 33/43] ipv6: Do cleanup if attribute validation fails in multipath route | Date | Mon, 10 Jan 2022 08:23:30 +0100 |
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From: David Ahern <dsahern@kernel.org>
[ Upstream commit 95bdba23b5b4aa75fe3e6c84335e638641c707bb ]
As Nicolas noted, if gateway validation fails walking the multipath attribute the code should jump to the cleanup to free previously allocated memory.
Fixes: 1ff15a710a86 ("ipv6: Check attribute length for RTA_GATEWAY when deleting multipath route") Signed-off-by: David Ahern <dsahern@kernel.org> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Link: https://lore.kernel.org/r/20220103170555.94638-1-dsahern@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- net/ipv6/route.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 230d4af44a300..654bf4ca61260 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -5166,12 +5166,10 @@ static int ip6_route_multipath_add(struct fib6_config *cfg, nla = nla_find(attrs, attrlen, RTA_GATEWAY); if (nla) { - int ret; - - ret = fib6_gw_from_attr(&r_cfg.fc_gateway, nla, + err = fib6_gw_from_attr(&r_cfg.fc_gateway, nla, extack); - if (ret) - return ret; + if (err) + goto cleanup; r_cfg.fc_flags |= RTF_GATEWAY; } -- 2.34.1
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