[PATCH] drm/amdgpu: add error handle to avoid out-of-bounds

[Christian König]

Am 23.04.24 um 11:15 schrieb Bob Zhou:
> if the sdma_v4_0_irq_id_to_seq return -EINVAL, the process should
> be stop to avoid out-of-bounds read, so directly return -EINVAL.
>
> Signed-off-by: Bob Zhou <bob.zhou at amd.com>

Acked-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> index e2e3856938ed..101038395c3b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> @@ -2021,6 +2021,9 @@ static int sdma_v4_0_process_trap_irq(struct amdgpu_device *adev,
>   
>   	DRM_DEBUG("IH: SDMA trap\n");
>   	instance = sdma_v4_0_irq_id_to_seq(entry->client_id);
> +	if (instance < 0)
> +		return instance;
> +
>   	switch (entry->ring_id) {
>   	case 0:
>   		amdgpu_fence_process(&adev->sdma.instance[instance].ring);