linux-kernel - [PATCH AUTOSEL 5.4 65/79] ip: fib_rules: Fetch net from fib_rule in fib[46]_rule

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Message-Id: <20250505232151.2698893-65-sashal@kernel.org>
Date: Mon,  5 May 2025 19:21:37 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Kuniyuki Iwashima <kuniyu@...zon.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Ido Schimmel <idosch@...dia.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	davem@...emloft.net,
	dsahern@...nel.org,
	pabeni@...hat.com,
	netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 65/79] ip: fib_rules: Fetch net from fib_rule in fib[46]_rule_configure().

From: Kuniyuki Iwashima <kuniyu@...zon.com>

[ Upstream commit 5a1ccffd30a08f5a2428cd5fbb3ab03e8eb6c66d ]

The following patch will not set skb->sk from VRF path.

Let's fetch net from fib_rule->fr_net instead of sock_net(skb->sk)
in fib[46]_rule_configure().

Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
Reviewed-by: Eric Dumazet <edumazet@...gle.com>
Reviewed-by: Ido Schimmel <idosch@...dia.com>
Tested-by: Ido Schimmel <idosch@...dia.com>
Link: https://patch.msgid.link/20250207072502.87775-5-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/ipv4/fib_rules.c  | 4 ++--
 net/ipv6/fib6_rules.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index e9a3cc9e98dfa..1617ea18fae3a 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -220,9 +220,9 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 			       struct nlattr **tb,
 			       struct netlink_ext_ack *extack)
 {
-	struct net *net = sock_net(skb->sk);
+	struct fib4_rule *rule4 = (struct fib4_rule *)rule;
+	struct net *net = rule->fr_net;
 	int err = -EINVAL;
-	struct fib4_rule *rule4 = (struct fib4_rule *) rule;
 
 	if (frh->tos & ~IPTOS_TOS_MASK) {
 		NL_SET_ERR_MSG(extack, "Invalid tos");
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 3cf9dc2231036..acb8610c9a9df 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -344,9 +344,9 @@ static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 			       struct nlattr **tb,
 			       struct netlink_ext_ack *extack)
 {
+	struct fib6_rule *rule6 = (struct fib6_rule *)rule;
+	struct net *net = rule->fr_net;
 	int err = -EINVAL;
-	struct net *net = sock_net(skb->sk);
-	struct fib6_rule *rule6 = (struct fib6_rule *) rule;
 
 	if (rule->action == FR_ACT_TO_TBL && !rule->l3mdev) {
 		if (rule->table == RT6_TABLE_UNSPEC) {
-- 
2.39.5