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Subject[PATCH] libnvdimm: fix dereference on null devs on error exit path
Date
From: Colin Ian King <colin.king@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.king@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
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