From 55c1fc0af29a6c1b92f217b7eb7581a882e0c07c Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Tue, 12 Mar 2019 03:20:34 -0500 Subject: [PATCH] libnvdimm/namespace: Fix a potential NULL pointer dereference In case kmemdup fails, the fix goes to blk_err to avoid NULL pointer dereference. Signed-off-by: Kangjie Lu Signed-off-by: Dan Williams --- 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) -- 2.30.2