From a002d148426f40bc2b7dc066982eb177cdebeaaa Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Sun, 8 Aug 2010 14:39:07 +0200 Subject: [PATCH] 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 Signed-off-by: Tejun Heo Cc: stable@kernel.org --- mm/percpu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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;