Commit f750aea0 authored Jun 10, 2015 by Sergey Senozhatsky Committed by Greg Hackmann Dec 09, 2015

UPSTREAM: zsmalloc: fix a null pointer dereference in destroy_handle_cache()



(cherry-pick from commit 02f7b4145da113683ad64c74bf64605e16b71789)

If zs_create_pool()->create_handle_cache()->kmem_cache_create() or
pool->name allocation fails, zs_create_pool()->destroy_handle_cache()
will dereference the NULL pool->handle_cachep.

Modify destroy_handle_cache() to avoid this.

Bug: 25951511

Change-Id: Ibf77819056b1ccd025a0aa1c9392f7ded11187c7
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d5a6bfb6

mm/zsmalloc.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -289,6 +289,7 @@ static int create_handle_cache(struct zs_pool *pool)

		static void destroy_handle_cache(struct zs_pool *pool)
		{
		if (pool->handle_cachep)
		kmem_cache_destroy(pool->handle_cachep);
		}