diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-09-12 16:02:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-09-15 10:33:46 +0100 |
| commit | 2da23eb07c91241d962f3ff05565065484cd8929 (patch) | |
| tree | 921417255db7f2389304c5f21aac9c828b58caa8 /net/netfilter/ipvs/ip_vs_sync.c | |
| parent | d986f52124e062753e33b6fe303be5904a997eac (diff) | |
ipv6: lockless IPV6_MULTICAST_HOPS implementation
This fixes data-races around np->mcast_hops,
and make IPV6_MULTICAST_HOPS lockless.
Note that np->mcast_hops is never negative,
thus can fit an u8 field instead of s16.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/ipvs/ip_vs_sync.c')
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_sync.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c index 3c2251cabd04..df1b33b61059 100644 --- a/net/netfilter/ipvs/ip_vs_sync.c +++ b/net/netfilter/ipvs/ip_vs_sync.c @@ -1322,7 +1322,7 @@ static void set_mcast_ttl(struct sock *sk, u_char ttl) struct ipv6_pinfo *np = inet6_sk(sk); /* IPV6_MULTICAST_HOPS */ - np->mcast_hops = ttl; + WRITE_ONCE(np->mcast_hops, ttl); } #endif release_sock(sk); |