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ipv4: remove unnecessary judgment in ip_route_output_key_hash_rcu

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In the ip_route_output_key_cash_rcu function, the input fl4 member saddr is
first checked to be non-zero before entering multicast, broadcast and
arbitrary IP address checks. However, the fact that the IP address is not
0 has already ruled out the possibility of any address, so remove
unnecessary judgment.

Signed-off-by: Zhengchao Shao <shaozhengchao@163.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20250409033321.108244-1-shaozhengchao@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Zhengchao Shao 2025-04-09 11:33:21 +08:00 committed by Jakub Kicinski
parent dd4f33b471
commit 3b4f78f9ad
1 changed files with 1 additions and 2 deletions
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3
net/ipv4/route.c
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@ -2699,8 +2699,7 @@ struct rtable *ip_route_output_key_hash_rcu(struct net *net, struct flowi4 *fl4,
if (fl4->saddr) {
if (ipv4_is_multicast(fl4->saddr) ||
ipv4_is_lbcast(fl4->saddr) ||
ipv4_is_zeronet(fl4->saddr)) {
ipv4_is_lbcast(fl4->saddr)) {
rth = ERR_PTR(-EINVAL);
goto out;
}