[PATCH 4.18 117/135] percpu: stop leaking bitmap metadata blocks

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

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

From: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>

commit 6685b357363bfe295e3ae73665014db4aed62c58 upstream.

The commit ca460b3c9627 ("percpu: introduce bitmap metadata blocks")
introduced bitmap metadata blocks. These metadata blocks are allocated
whenever a new chunk is created, but they are never freed. Fix it.

Fixes: ca460b3c9627 ("percpu: introduce bitmap metadata blocks")
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Dennis Zhou <dennis@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 mm/percpu.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1204,6 +1204,7 @@ static void pcpu_free_chunk(struct pcpu_
 {
 	if (!chunk)
 		return;
+	pcpu_mem_free(chunk->md_blocks);
 	pcpu_mem_free(chunk->bound_map);
 	pcpu_mem_free(chunk->alloc_map);
 	pcpu_mem_free(chunk);