diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-09-18 14:23:21 +0000 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-09-19 18:21:44 +0200 |
| commit | fa17a6d8a5bd0cd7565b613cb804242cd0f6b7ab (patch) | |
| tree | 47b212f49ee830235b382165cf734328cdff2e00 /net/ipv6/route.c | |
| parent | 6a23c555f7eb436d6799533675ffa179db3d5834 (diff) | |
ipv6: lockless IPV6_ADDR_PREFERENCES implementation
We have data-races while reading np->srcprefs
Switch the field to a plain byte, add READ_ONCE()
and WRITE_ONCE() annotations where needed,
and IPV6_ADDR_PREFERENCES setsockopt() can now be lockless.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20230918142321.1794107-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 9d8dfc7423e4..b132feae3393 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2622,7 +2622,7 @@ static struct dst_entry *ip6_route_output_flags_noref(struct net *net, if (!any_src) flags |= RT6_LOOKUP_F_HAS_SADDR; else if (sk) - flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs); + flags |= rt6_srcprefs2flags(READ_ONCE(inet6_sk(sk)->srcprefs)); return fib6_rule_lookup(net, fl6, NULL, flags, ip6_pol_route_output); } |