Btrfs-progs: add kstrdup() return value check

When allocating a btrfs_device structure, device_list_add()
in volumes.c was not checking if the call to duplicate the
label string succeeded or not.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/volumes.c b/volumes.c
index 68b4294c..28b208de 100644
--- a/volumes.c
+++ b/volumes.c
@@ -124,6 +124,11 @@ static int device_list_add(const char *path,
 			return -ENOMEM;
 		}
 		device->label = kstrdup(disk_super->label, GFP_NOFS);
+		if (!device->label) {
+			kfree(device->name);
+			kfree(device);
+			return -ENOMEM;
+		}
 		device->total_devs = btrfs_super_num_devices(disk_super);
 		device->super_bytes_used = btrfs_super_bytes_used(disk_super);
 		device->total_bytes =