* [PATCH v3] drm/ttm: check the return value of kzalloc
@ 2018-01-02 13:24 Xiongwei Song
2018-01-02 14:33 ` Christian König
0 siblings, 1 reply; 2+ messages in thread
From: Xiongwei Song @ 2018-01-02 13:24 UTC (permalink / raw)
To: christian.koenig, Hongbo.He, airlied; +Cc: dri-devel, linux-kernel
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>
---
v2->v3: delete goto expression
v1->v2: delete kfree _manager
---
drivers/gpu/drm/ttm/ttm_page_alloc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index b5ba6441489f..5d252fb27a82 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -1007,6 +1007,8 @@ 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", 0);
--
2.15.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v3] drm/ttm: check the return value of kzalloc
2018-01-02 13:24 [PATCH v3] drm/ttm: check the return value of kzalloc Xiongwei Song
@ 2018-01-02 14:33 ` Christian König
0 siblings, 0 replies; 2+ messages in thread
From: Christian König @ 2018-01-02 14:33 UTC (permalink / raw)
To: Xiongwei Song, Hongbo.He, airlied; +Cc: linux-kernel, dri-devel
Am 02.01.2018 um 14:24 schrieb Xiongwei Song:
> 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>
Going to pick that up for the next release.
Thanks,
Christian.
> ---
> v2->v3: delete goto expression
> v1->v2: delete kfree _manager
> ---
> drivers/gpu/drm/ttm/ttm_page_alloc.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> index b5ba6441489f..5d252fb27a82 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> @@ -1007,6 +1007,8 @@ 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", 0);
>
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