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authorAditya Pakki <pakki001@umn.edu>2019-03-26 00:55:27 +0300
committerDan Williams <dan.j.williams@intel.com>2019-03-27 20:08:55 +0300
commit486fa92df4707b5df58d6508728bdb9321a59766 (patch)
tree866f674f33e865b0ce8e199890a10efe4f1e563e /drivers/nvdimm/btt_devs.c
parent55c1fc0af29a6c1b92f217b7eb7581a882e0c07c (diff)
downloadlinux-486fa92df4707b5df58d6508728bdb9321a59766.tar.xz
libnvdimm/btt: Fix a kmemdup failure check
In case kmemdup fails, the fix releases resources and returns to avoid the NULL pointer dereference. Signed-off-by: Aditya Pakki <pakki001@umn.edu> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/btt_devs.c')
-rw-r--r--drivers/nvdimm/btt_devs.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c
index b72a303176c7..9486acc08402 100644
--- a/drivers/nvdimm/btt_devs.c
+++ b/drivers/nvdimm/btt_devs.c
@@ -198,14 +198,15 @@ static struct device *__nd_btt_create(struct nd_region *nd_region,
return NULL;
nd_btt->id = ida_simple_get(&nd_region->btt_ida, 0, 0, GFP_KERNEL);
- if (nd_btt->id < 0) {
- kfree(nd_btt);
- return NULL;
- }
+ if (nd_btt->id < 0)
+ goto out_nd_btt;
nd_btt->lbasize = lbasize;
- if (uuid)
+ if (uuid) {
uuid = kmemdup(uuid, 16, GFP_KERNEL);
+ if (!uuid)
+ goto out_put_id;
+ }
nd_btt->uuid = uuid;
dev = &nd_btt->dev;
dev_set_name(dev, "btt%d.%d", nd_region->id, nd_btt->id);
@@ -220,6 +221,13 @@ static struct device *__nd_btt_create(struct nd_region *nd_region,
return NULL;
}
return dev;
+
+out_put_id:
+ ida_simple_remove(&nd_region->btt_ida, nd_btt->id);
+
+out_nd_btt:
+ kfree(nd_btt);
+ return NULL;
}
struct device *nd_btt_create(struct nd_region *nd_region)