From: Tobin C. Harding <tobin@xxxxxxxxxx>
commit 450ff8348808a89cc27436771aa05c2b90c0eef1 upstream.
If a call to kobject_init_and_add() fails we must call kobject_put()
otherwise we leak memory.
Calling kobject_put() when kobject_init_and_add() fails drops the
refcount back to 0 and calls the ktype release method (which in turn
calls the percpu destroy and kfree).
Add call to kobject_put() in the error path of call to
kobject_init_and_add().
Cc: stable@xxxxxxxxxxxxxxx # v4.4+
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Tobin C. Harding <tobin@xxxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/extent-tree.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3985,8 +3985,7 @@ static int create_space_info(struct btrf
info->space_info_kobj, "%s",
alloc_name(space_info->flags));
if (ret) {
- percpu_counter_destroy(&space_info->total_bytes_pinned);
- kfree(space_info);
+ kobject_put(&space_info->kobj);
return ret;
}
