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libnvdimm/namespace: Fix a potential NULL pointer dereference

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In case kmemdup fails, the fix goes to blk_err to avoid NULL
pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Kangjie Lu 2019-03-12 03:20:34 -05:00 • committed by Dan Williams
parent 351f339faa
commit 55c1fc0af2
1 changed files with 4 additions and 1 deletions
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5
drivers/nvdimm/namespace_devs.c
View file

@ -2249,9 +2249,12 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
if (!nsblk->uuid) if (!nsblk->uuid)
goto blk_err; goto blk_err;
memcpy(name, nd_label->name, NSLABEL_NAME_LEN); memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
if (name[0]) if (name[0]) {
nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
GFP_KERNEL); GFP_KERNEL);
if (!nsblk->alt_name)
goto blk_err;
}
res = nsblk_add_resource(nd_region, ndd, nsblk, res = nsblk_add_resource(nd_region, ndd, nsblk,
__le64_to_cpu(nd_label->dpa)); __le64_to_cpu(nd_label->dpa));
if (!res) if (!res)