[PATCH 3.16 029/410] scsi: libsas: fix memory leak in sas_smp_get_phy_events()

From: Ben Hutchings
Date: Thu Jun 07 2018 - 12:11:30 EST


3.16.57-rc1 review patch. If anyone has any objections, please let me know.

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

From: Jason Yan <yanaijie@xxxxxxxxxx>

commit 4a491b1ab11ca0556d2fda1ff1301e862a2d44c4 upstream.

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@xxxxxxxxxx>
CC: John Garry <john.garry@xxxxxxxxxx>
CC: chenqilin <chenqilin2@xxxxxxxxxx>
CC: chenxiang <chenxiang66@xxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
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;