[PATCH v2] drm/amdgpu: Fix the null pointer dereference to ras_manager

[Lazar, Lijo]

On 5/14/2024 9:42 AM, Ma Jun wrote:
> Check ras_manager before using it
> 
> Signed-off-by: Ma Jun <Jun.Ma2 at amd.com>

Reviewed-by: Lijo Lazar <lijo.lazar at amd.com>

Thanks,
Lijo

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> index 925ec65ac5ed..2bcf5c3b5d70 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> @@ -2172,12 +2172,15 @@ static void amdgpu_ras_interrupt_process_handler(struct work_struct *work)
>  int amdgpu_ras_interrupt_dispatch(struct amdgpu_device *adev,
>  		struct ras_dispatch_if *info)
>  {
> -	struct ras_manager *obj = amdgpu_ras_find_obj(adev, &info->head);
> -	struct ras_ih_data *data = &obj->ih_data;
> +	struct ras_manager *obj;
> +	struct ras_ih_data *data;
>  
> +	obj = amdgpu_ras_find_obj(adev, &info->head);
>  	if (!obj)
>  		return -EINVAL;
>  
> +	data = &obj->ih_data;
> +
>  	if (data->inuse == 0)
>  		return 0;
>