percpu: stop leaking bitmap metadata blocks

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@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/mm/percpu.c b/mm/percpu.c
index 5fa5e79..3074148 100644 (file)
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1208,6 +1208,7 @@ static void pcpu_free_chunk(struct pcpu_chunk *chunk)
 {
        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);