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

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Date:   Tue, 16 Oct 2018 19:05:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Dennis Zhou <dennis@...nel.org>
Subject: [PATCH 4.18 117/135] percpu: stop leaking bitmap metadata blocks

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

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

From: Mike Rapoport <rppt@...ux.vnet.ibm.com>

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@...ux.vnet.ibm.com>
Cc: stable@...r.kernel.org
Signed-off-by: Dennis Zhou <dennis@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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);