linux-kernel - [PATCH 3.13.y-ckt 058/156] ematch: Fix auto-loading of ematch modules.

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Date:	Tue,  7 Apr 2015 15:49:55 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Ignacy Gawędzki 
	<ignacy.gawedzki@...en-communications.fr>,
	"David S. Miller" <davem@...emloft.net>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 058/156] ematch: Fix auto-loading of ematch modules.

3.13.11-ckt19 -stable review patch.  If anyone has any objections, please let me know.

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

From: =?UTF-8?q?Ignacy=20Gaw=C4=99dzki?=

[ Upstream commit 34eea79e2664b314cab6a30fc582fdfa7a1bb1df ]

In tcf_em_validate(), after calling request_module() to load the
kind-specific module, set em->ops to NULL before returning -EAGAIN, so
that module_put() is not called again by tcf_em_tree_destroy().

Signed-off-by: Ignacy Gawędzki <ignacy.gawedzki@...en-communications.fr>
Acked-by: Cong Wang <cwang@...pensource.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 net/sched/ematch.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sched/ematch.c b/net/sched/ematch.c
index 3a633de..a2abc44 100644
--- a/net/sched/ematch.c
+++ b/net/sched/ematch.c
@@ -227,6 +227,7 @@ static int tcf_em_validate(struct tcf_proto *tp,
 				 * to replay the request.
 				 */
 				module_put(em->ops->owner);
+				em->ops = NULL;
 				err = -EAGAIN;
 			}
 #endif
-- 
1.9.1

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