linux-kernel - [PATCH] percpu: stop leaking bitmap metadata blocks

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Message-Id: <1538901111-22823-1-git-send-email-rppt@linux.vnet.ibm.com>
Date:   Sun,  7 Oct 2018 11:31:51 +0300
From:   Mike Rapoport <rppt@...ux.vnet.ibm.com>
To:     Dennis Zhou <dennis@...nel.org>
Cc:     Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
        Roman Gushchin <guro@...com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>, stable@...r.kernel.org
Subject: [PATCH] percpu: stop leaking bitmap metadata blocks

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

diff --git a/mm/percpu.c b/mm/percpu.c
index d21cb13..25104cd 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1212,6 +1212,7 @@ 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);
-- 
2.7.4