[PATCH v2] drm/amdgpu: prevent BO_HANDLES error from being overwritten

[Christian König]

Am 09.10.24 um 14:28 schrieb Mohammed Anees:
> Before this patch, if multiple BO_HANDLES chunks were submitted,
> the error -EINVAL would be correctly set but could be overwritten
> by the return value from amdgpu_cs_p1_bo_handles(). This patch
> ensures that if there are multiple BO_HANDLES, we stop.
>
> Cc: stable at vger.kernel.org
> Fixes: fec5f8e8c6bc ("drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit")
> Signed-off-by: Mohammed Anees <pvmohammedanees2003 at gmail.com>

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

@Pierre-Eric can you pick that one up and push to amd-staging-drm-next?

Alex is currently on XDC and I'm a bit busy as well.

Thanks,
Christian.

> ---
> v2:
> - Switched to goto free_partial_kdata for error handling, following the existing pattern.
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 1e475eb01417..d891ab779ca7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -265,7 +265,7 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
>   
>   			/* Only a single BO list is allowed to simplify handling. */
>   			if (p->bo_list)
> -				ret = -EINVAL;
> +				goto free_partial_kdata;
>   
>   			ret = amdgpu_cs_p1_bo_handles(p, p->chunks[i].kdata);
>   			if (ret)