[PATCH 3.2 043/106] block: fix an error code in add_partition()

[Ben Hutchings]

3.2.93-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit 7bd897cfce1eb373892d35d7f73201b0f9b221c4 upstream.

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.carpenter@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 fs/partitions/check.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -457,8 +457,10 @@ struct hd_struct *add_partition(struct g
 
 	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;
 	}