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authorDan Carpenter <dan.carpenter@oracle.com>2016-10-12 09:34:29 +0300
committerDan Williams <dan.j.williams@intel.com>2016-10-19 10:35:51 -0700
commit75d29713b792da4782cadfaa87e802183440694e (patch)
tree3d279ed95896399f5b220ac0c554d632432de89a /drivers/nvdimm
parent1001354ca34179f3db924eb66672442a173147dc (diff)
downloadlinux-75d29713b792da4782cadfaa87e802183440694e.tar.bz2
libnvdimm, namespace: potential NULL deref on allocation error
If the kcalloc() fails then "devs" can be NULL and we dereference it checking "devs[i]". Fixes: 1b40e09a1232 ('libnvdimm: blk labels and namespace instantiation') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/namespace_devs.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 3509cff68ef9..abe5c6bc756c 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -2176,12 +2176,14 @@ static struct device **scan_labels(struct nd_region *nd_region)
return devs;
err:
- for (i = 0; devs[i]; i++)
- if (is_nd_blk(&nd_region->dev))
- namespace_blk_release(devs[i]);
- else
- namespace_pmem_release(devs[i]);
- kfree(devs);
+ if (devs) {
+ for (i = 0; devs[i]; i++)
+ if (is_nd_blk(&nd_region->dev))
+ namespace_blk_release(devs[i]);
+ else
+ namespace_pmem_release(devs[i]);
+ kfree(devs);
+ }
return NULL;
}