From 55c1fc0af29a6c1b92f217b7eb7581a882e0c07c Mon Sep 17 00:00:00 2001
From: Kangjie Lu <kjlu@umn.edu>
Date: Tue, 12 Mar 2019 03:20:34 -0500
Subject: [PATCH] libnvdimm/namespace: Fix a potential NULL pointer dereference
Git-commit: 55c1fc0af29a6c1b92f217b7eb7581a882e0c07c
Patch-mainline: v5.1-rc6
References: git-fixes
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>
Signed-off-by: Coly Li <colyli@suse.de>
---
drivers/nvdimm/namespace_devs.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 7849bf1812c4..f293556cbbf6 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -2249,9 +2249,12 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
if (!nsblk->uuid)
goto blk_err;
memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
- if (name[0])
+ if (name[0]) {
nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
GFP_KERNEL);
+ if (!nsblk->alt_name)
+ goto blk_err;
+ }
res = nsblk_add_resource(nd_region, ndd, nsblk,
__le64_to_cpu(nd_label->dpa));
if (!res)
--
2.35.3