[PATCH AUTOSEL for 4.9 098/281] block: fix an error code in add_partition()

[Sasha Levin]

From: Dan Carpenter <dan.carpen...@oracle.com>

[ Upstream commit 7bd897cfce1eb373892d35d7f73201b0f9b221c4 ]

We don't set an error code on this path.  It means that we return NULL
instead of an error pointer and the caller does a NULL dereference.

Fixes: 6d1d8050b4bc ("block, partition: add partition_meta_info to hd_struct")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Jens Axboe <ax...@fb.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 block/partition-generic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/partition-generic.c b/block/partition-generic.c
index a2437c006640..298c05f8b5e3 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -321,8 +321,10 @@ struct hd_struct *add_partition(struct gendisk *disk, int 
partno,
 
        if (info) {
                struct partition_meta_info *pinfo = alloc_part_info(disk);
-               if (!pinfo)
+               if (!pinfo) {
+                       err = -ENOMEM;
                        goto out_free_stats;
+               }
                memcpy(pinfo, info, sizeof(*info));
                p->info = pinfo;
        }
-- 
2.14.1