From 6559c0ff3bc27d7e4d447d31c1d7e8eae0e959f5 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Tue, 12 Sep 2023 16:02:05 +0000
Subject: ipv6: lockless IPV6_MULTICAST_ALL implementation

Move np->mc_all to an atomic flags to fix data-races.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv6/mcast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'net/ipv6/mcast.c')

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 4a7967623909..99e28b444a4c 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -642,7 +642,7 @@ bool inet6_mc_check(const struct sock *sk, const struct in6_addr *mc_addr,
 	}
 	if (!mc) {
 		rcu_read_unlock();
-		return np->mc_all;
+		return inet6_test_bit(MC6_ALL, sk);
 	}
 	psl = rcu_dereference(mc->sflist);
 	if (!psl) {
-- 
cgit