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Date: Sun, 11 Nov 2018 14:24:37 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Florian Westphal <fw@...len.de>,
Steffen Klassert <steffen.klassert@...unet.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 018/141] xfrm: policy: use hlist rcu variants on insert
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Florian Westphal <fw@...len.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@...len.de>
Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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
@@ -659,9 +659,9 @@ 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);
@@ -800,9 +800,9 @@ 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);
atomic_inc(&net->xfrm.flow_cache_genid);
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