xfrm: policy: use hlist rcu variants on insert

[ Upstream commit 9dffff200fd178f11dd50eb1fd8ccd0650c9284e ]

bydst table/list lookups use rcu, so insertions must use rcu versions.

Fixes: a7c44247f704e ("xfrm: policy: make xfrm_policy_lookup_bytype lockless")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index d0dcfc6..155b159 100644 (file)
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -659,9 +659,9 @@ static void xfrm_hash_rebuild(struct work_struct *work)
                                break;
                }
                if (newpos)
-                       hlist_add_behind(&policy->bydst, newpos);
+                       hlist_add_behind_rcu(&policy->bydst, newpos);
                else
-                       hlist_add_head(&policy->bydst, chain);
+                       hlist_add_head_rcu(&policy->bydst, chain);
        }
 
        spin_unlock_bh(&net->xfrm.xfrm_policy_lock);
@@ -800,9 +800,9 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
                        break;
        }
        if (newpos)
-               hlist_add_behind(&policy->bydst, newpos);
+               hlist_add_behind_rcu(&policy->bydst, newpos);
        else
-               hlist_add_head(&policy->bydst, chain);
+               hlist_add_head_rcu(&policy->bydst, chain);
        __xfrm_policy_link(policy, dir);
        atomic_inc(&net->xfrm.flow_cache_genid);