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


From: Jason Yan <yanai...@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;

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

Fixes: 2908d778ab3e ("[SCSI] aic94xx: new driver")
Signed-off-by: Jason Yan <yanai...@huawei.com>
CC: John Garry <john.ga...@huawei.com>
CC: chenqilin <chenqil...@huawei.com>
CC: chenxiang <chenxian...@hisilicon.com>
Reviewed-by: Christoph Hellwig <h...@lst.de>
Reviewed-by: Hannes Reinecke <h...@suse.com>
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@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]);
+       kfree(req);
        return res;

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