diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-09-12 19:02:10 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-09-15 12:33:48 +0300 |
| commit | 83cd5eb654b320c1972254f243531f3f3cebcccf (patch) | |
| tree | a8d72a0578be0a6c28249b7792498117fb84fee6 /net/ipv6/ipv6_sockglue.c | |
| parent | 3cccda8db2cf2f2a224d55d5b6e2251d478c58ca (diff) | |
| download | linux-83cd5eb654b320c1972254f243531f3f3cebcccf.tar.xz | |
ipv6: lockless IPV6_ROUTER_ALERT_ISOLATE implementation
Reads from np->rtalert_isolate are racy.
Move this flag to inet->inet_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>
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index ec10b45c49c1..c22a492e0536 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -488,6 +488,11 @@ int do_ipv6_setsockopt(struct sock *sk, int level, int optname, if (!val) skb_errqueue_purge(&sk->sk_error_queue); return 0; + case IPV6_ROUTER_ALERT_ISOLATE: + if (optlen < sizeof(int)) + return -EINVAL; + inet6_assign_bit(RTALERT_ISOLATE, sk, valbool); + return 0; } if (needs_rtnl) rtnl_lock(); @@ -936,12 +941,6 @@ done: goto e_inval; retv = ip6_ra_control(sk, val); break; - case IPV6_ROUTER_ALERT_ISOLATE: - if (optlen < sizeof(int)) - goto e_inval; - np->rtalert_isolate = valbool; - retv = 0; - break; case IPV6_MTU_DISCOVER: if (optlen < sizeof(int)) goto e_inval; @@ -1452,7 +1451,7 @@ int do_ipv6_getsockopt(struct sock *sk, int level, int optname, break; case IPV6_ROUTER_ALERT_ISOLATE: - val = np->rtalert_isolate; + val = inet6_test_bit(RTALERT_ISOLATE, sk); break; case IPV6_RECVERR_RFC4884: |