netdev - [PATCH net 12/16] ipv6: output: convert to dev_net

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250131171334.1172661-13-edumazet@google.com>
Date: Fri, 31 Jan 2025 17:13:30 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, Kuniyuki Iwashima <kuniyu@...zon.com>, 
	Simon Horman <horms@...nel.org>, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net 12/16] ipv6: output: convert to dev_net_rcu()

dev_net() calls from net/ipv6/ip6_output.c
and net/ipv6/output_core.c are happening under RCU
protection.

Convert them to dev_net_rcu() to ensure LOCKDEP support.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv6/ip6_output.c  | 4 ++--
 net/ipv6/output_core.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index d577bf2f3053873d27b241029592cdbb0a124ad7..4c73a4cdcb23f76d81e572d5b1bd0f6902447c0e 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -393,7 +393,7 @@ static int ip6_call_ra_chain(struct sk_buff *skb, int sel)
 		     sk->sk_bound_dev_if == skb->dev->ifindex)) {
 
 			if (inet6_test_bit(RTALERT_ISOLATE, sk) &&
-			    !net_eq(sock_net(sk), dev_net(skb->dev))) {
+			    !net_eq(sock_net(sk), dev_net_rcu(skb->dev))) {
 				continue;
 			}
 			if (last) {
@@ -503,7 +503,7 @@ int ip6_forward(struct sk_buff *skb)
 	struct dst_entry *dst = skb_dst(skb);
 	struct ipv6hdr *hdr = ipv6_hdr(skb);
 	struct inet6_skb_parm *opt = IP6CB(skb);
-	struct net *net = dev_net(dst->dev);
+	struct net *net = dev_net_rcu(dst->dev);
 	struct inet6_dev *idev;
 	SKB_DR(reason);
 	u32 mtu;
diff --git a/net/ipv6/output_core.c b/net/ipv6/output_core.c
index 806d4b5dd1e60b27726facbb59bbef97d6fee7f5..94438fd4f0e833bb8f5ea4822c7312376ea79304 100644
--- a/net/ipv6/output_core.c
+++ b/net/ipv6/output_core.c
@@ -113,7 +113,7 @@ int ip6_dst_hoplimit(struct dst_entry *dst)
 		if (idev)
 			hoplimit = READ_ONCE(idev->cnf.hop_limit);
 		else
-			hoplimit = READ_ONCE(dev_net(dev)->ipv6.devconf_all->hop_limit);
+			hoplimit = READ_ONCE(dev_net_rcu(dev)->ipv6.devconf_all->hop_limit);
 		rcu_read_unlock();
 	}
 	return hoplimit;
-- 
2.48.1.362.g079036d154-goog