diff options
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 9302647f20a0..3d27b9a2fbac 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1249,10 +1249,9 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir, const struct flowi *fl) { struct xfrm_policy *pol; - struct net *net = sock_net(sk); rcu_read_lock(); - read_lock_bh(&net->xfrm.xfrm_policy_lock); + again: pol = rcu_dereference(sk->sk_policy[dir]); if (pol != NULL) { bool match = xfrm_selector_match(&pol->selector, fl, @@ -1267,8 +1266,8 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir, err = security_xfrm_policy_lookup(pol->security, fl->flowi_secid, policy_to_flow_dir(dir)); - if (!err) - xfrm_pol_hold(pol); + if (!err && !xfrm_pol_hold_rcu(pol)) + goto again; else if (err == -ESRCH) pol = NULL; else @@ -1277,7 +1276,6 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir, pol = NULL; } out: - read_unlock_bh(&net->xfrm.xfrm_policy_lock); rcu_read_unlock(); return pol; } |