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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Florian Westphal <fw@strlen.de>,
        Steffen Klassert <steffen.klassert@secunet.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.14 027/222] xfrm: policy: use hlist rcu variants on insert
Date:   Sun, 11 Nov 2018 14:22:04 -0800
Message-Id: <20181111221650.718226953@linuxfoundation.org>
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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Florian Westphal <fw@strlen.de>

[ 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>
---
 net/xfrm/xfrm_policy.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -626,9 +626,9 @@ static void xfrm_hash_rebuild(struct wor
 				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);
@@ -767,9 +767,9 @@ int xfrm_policy_insert(int dir, struct x
 			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);
 
 	/* After previous checking, family can either be AF_INET or AF_INET6 */