[PATCH] libnvdimm: fix dereference on null devs on error exit path

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

If devs cannot be allocated then the error exit path jumps to
a cleanup loop that iterates over a null array of devs which
is incorrect.  Fix this by jumping instead to the end of the
function where NULL is returned.

Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/nvdimm/namespace_devs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 3509cff..5d2755a 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -2125,7 +2125,7 @@ static struct device **scan_labels(struct nd_region 
*nd_region)
 
                devs = kcalloc(2, sizeof(dev), GFP_KERNEL);
                if (!devs)
-                       goto err;
+                       goto err_ret;
                if (is_nd_blk(&nd_region->dev)) {
                        struct nd_namespace_blk *nsblk;
 
@@ -2182,6 +2182,7 @@ static struct device **scan_labels(struct nd_region 
*nd_region)
                else
                        namespace_pmem_release(devs[i]);
        kfree(devs);
+ err_ret:
        return NULL;
 }
 
-- 
2.9.3