Patch "scsi: scsi_dh_alua: fix missing kref_put() in alua_rtpg_work()" has been added to the 4.8-stable tree

Patch "scsi: scsi_dh_alua: fix missing kref_put() in alua_rtpg_work()" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    scsi: scsi_dh_alua: fix missing kref_put() in alua_rtpg_work()

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     scsi-scsi_dh_alua-fix-missing-kref_put-in-alua_rtpg_work.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1fdd14279eab2e9f79745631379f0c53cb8f9a5a Mon Sep 17 00:00:00 2001
From: "tang.junhui" <tang.junhui@zte.com.cn>
Date: Fri, 28 Oct 2016 15:54:07 +0800
Subject: scsi: scsi_dh_alua: fix missing kref_put() in alua_rtpg_work()

From: tang.junhui <tang.junhui@zte.com.cn>

commit 1fdd14279eab2e9f79745631379f0c53cb8f9a5a upstream.

Reference count of pg leaks in alua_rtpg_work() since kref_put() is not
called to decrease the reference count of pg when the condition
pg->rtpg_sdev==NULL satisfied (actually it is easy to satisfy), it would
cause memory of pg leakage.

Signed-off-by: tang.junhui <tang.junhui@zte.com.cn>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/device_handler/scsi_dh_alua.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -792,6 +792,7 @@ static void alua_rtpg_work(struct work_s
 		WARN_ON(pg->flags & ALUA_PG_RUN_RTPG);
 		WARN_ON(pg->flags & ALUA_PG_RUN_STPG);
 		spin_unlock_irqrestore(&pg->lock, flags);
+		kref_put(&pg->kref, release_port_group);
 		return;
 	}
 	if (pg->flags & ALUA_SYNC_STPG)


Patches currently in stable-queue which might be from tang.junhui@zte.com.cn are

queue-4.8/scsi-scsi_dh_alua-fix-missing-kref_put-in-alua_rtpg_work.patch
queue-4.8/scsi-scsi_dh_alua-fix-a-reference-counting-bug.patch