Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Jason Yan <yanaijie@huawei.com>,
        John Garry <john.garry@huawei.com>,
        chenqilin <chenqilin2@huawei.com>,
        chenxiang <chenxiang66@hisilicon.com>,
        Christoph Hellwig <hch@lst.de>,
        Hannes Reinecke <hare@suse.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 3.18 092/121] scsi: libsas: fix memory leak in sas_smp_get_phy_events()
Date:   Wed, 11 Apr 2018 20:36:35 +0200
Message-Id: <20180411183502.101242628@linuxfoundation.org>
In-Reply-To: <20180411183456.195010921@linuxfoundation.org>
References: <20180411183456.195010921@linuxfoundation.org>
User-Agent: quilt/0.65
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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

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

From: Jason Yan <yanaijie@huawei.com>


[ Upstream commit 4a491b1ab11ca0556d2fda1ff1301e862a2d44c4 ]

We've got a memory leak with the following producer:

while true;
do cat /sys/class/sas_phy/phy-1:0:12/invalid_dword_count >/dev/null;
done

The buffer req is allocated and not freed after we return. Fix it.

Fixes: 2908d778ab3e ("[SCSI] aic94xx: new driver")
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: chenqilin <chenqilin2@huawei.com>
CC: chenxiang <chenxiang66@hisilicon.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/scsi/libsas/sas_expander.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -684,6 +684,7 @@ int sas_smp_get_phy_events(struct sas_ph
 	phy->phy_reset_problem_count = scsi_to_u32(&resp[24]);
 
  out:
+	kfree(req);
 	kfree(resp);
 	return res;