From: Xiongwei Song <sxwjean@gmail.com>
Date: Tue, 2 Jan 2018 13:24:55 +0000 (+0800)
Subject: drm/ttm: check the return value of kzalloc
X-Git-Tag: v4.4.120~12
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0fe227000f71fa94a1415d0c8cafa7edda1534ba;p=thirdparty%2Fkernel%2Fstable.git

drm/ttm: check the return value of kzalloc


[ Upstream commit 19d859a7205bc59ffc38303eb25ae394f61d21dc ]

In the function ttm_page_alloc_init, kzalloc call is made for variable
_manager, we need to check its return value, it may return NULL.

Signed-off-by: Xiongwei Song <sxwjean@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 5d8dfe027b302..75d51ec98e062 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -818,6 +818,8 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
 	pr_info("Initializing pool allocator\n");
 
 	_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
+	if (!_manager)
+		return -ENOMEM;
 
 	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");