[PATCH] drm: msm: add null pointer check

[Abhinav Kumar]

Seems to be a duplicate of

https://patchwork.freedesktop.org/patch/479378/

Thanks

Abhinav

On 3/29/2022 3:34 AM, cgel.zte at gmail.com wrote:
> From: Lv Ruyi <lv.ruyi at zte.com.cn>
> 
> kzalloc is a memory allocation function which can return NULL when some
> internal memory errors happen. Add null pointer check to avoid
> dereferencing null pointer.
> 
> Reported-by: Zeal Robot <zealci at zte.com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi at zte.com.cn>
> ---
>   drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
> index 5d2ff6791058..acfe1b31e079 100644
> --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
> +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
> @@ -176,6 +176,8 @@ void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len,
>   	va_list va;
>   
>   	new_blk = kzalloc(sizeof(struct msm_disp_state_block), GFP_KERNEL);
> +	if (!new_blk)
> +		return;
>   
>   	va_start(va, fmt);
>