From: Huang Shijie <shijie8@gmail.com>
Date: Sun, 8 Aug 2010 12:39:07 +0000 (+0200)
Subject: percpu: fix a memory leak in pcpu_extend_area_map()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a002d148426f40bc2b7dc066982eb177cdebeaaa;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

percpu: fix a memory leak in pcpu_extend_area_map()

The original code did not free the old map.  This patch fixes it.

tj: use @old as memcpy source instead of @chunk->map, and indentation
    and description update

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@kernel.org
---

diff --git a/mm/percpu.c b/mm/percpu.c
index e61dc2cc5873..a1830d8e3318 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -393,7 +393,9 @@ static int pcpu_extend_area_map(struct pcpu_chunk *chunk, int new_alloc)
 		goto out_unlock;
 
 	old_size = chunk->map_alloc * sizeof(chunk->map[0]);
-	memcpy(new, chunk->map, old_size);
+	old = chunk->map;
+
+	memcpy(new, old, old_size);
 
 	chunk->map_alloc = new_alloc;
 	chunk->map = new;