[PATCH] drm/amdgpu: Fix memory leak in amdgpu_cs_pass1

[Luben Tuikov]

Thanks for fixing this.

Please add a Cc tag to stable, and repost.

Reviewed-by: Luben Tuikov <luben.tuikov at amd.com>

Regards,
Luben

On 2022-11-10 09:33, Dong Chenchen wrote:
> When p->gang_size equals 0, amdgpu_cs_pass1() will return directly
> without freeing chunk_array, which will cause a memory leak issue,
> this patch fixes it.
> 
> Fixes: 4624459c84d7 ("drm/amdgpu: add gang submit frontend v6")
> Signed-off-by: Dong Chenchen <dongchenchen2 at huawei.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index 1bbd39b3b0fc..0e24d6b80e0b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -287,8 +287,10 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
>  		}
>  	}
>  
> -	if (!p->gang_size)
> -		return -EINVAL;
> +	if (!p->gang_size) {
> +		ret = -EINVAL;
> +		goto free_partial_kdata;
> +	}
>  
>  	for (i = 0; i < p->gang_size; ++i) {
>  		ret = amdgpu_job_alloc(p->adev, num_ibs[i], &p->jobs[i], vm);