Re: [PATCH] drm/xe: Fix memory leak when handling pagefault vma

["Thomas Hellström" <thomas.hellstrom@linux.intel.com>]

On Thu, 2025-11-20 at 18:14 +0200, Mika Kuoppala wrote:
> When the pagefault handling code was moved to a new file, an extra
> drm_exec_init() was added to the VMA path. This call is unnecessary
> because
> xe_validation_ctx_init() already performs a drm_exec_init(),
> resulting in a
> memory leak reported by kmemleak.
> 
> Remove the redundant drm_exec_init() from the VMA pagefault handling
> code.
> 
> Fixes: fb544b844508 ("drm/xe: Implement xe_pagefault_queue_work")
> Cc: Matthew Brost <matthew.brost@intel.com>
> Cc: Stuart Summers <stuart.summers@intel.com>
> Cc: Lucas De Marchi <lucas.demarchi@intel.com>
> Cc: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Cc: Sumit Semwal <sumit.semwal@linaro.org>
> Cc: "Christian König" <christian.koenig@amd.com>
> Cc: intel-xe@lists.freedesktop.org
> Cc: linux-media@vger.kernel.org
> Cc: dri-devel@lists.freedesktop.org
> Cc: linaro-mm-sig@lists.linaro.org
> Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
> ---
>  drivers/gpu/drm/xe/xe_pagefault.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/xe/xe_pagefault.c
> b/drivers/gpu/drm/xe/xe_pagefault.c
> index fe3e40145012..afb06598b6e1 100644
> --- a/drivers/gpu/drm/xe/xe_pagefault.c
> +++ b/drivers/gpu/drm/xe/xe_pagefault.c
> @@ -102,7 +102,6 @@ static int xe_pagefault_handle_vma(struct xe_gt
> *gt, struct xe_vma *vma,
>  
>  	/* Lock VM and BOs dma-resv */
>  	xe_validation_ctx_init(&ctx, &vm->xe->val, &exec, (struct
> xe_val_flags) {});
> -	drm_exec_init(&exec, 0, 0);
>  	drm_exec_until_all_locked(&exec) {
>  		err = xe_pagefault_begin(&exec, vma, tile->mem.vram,
>  					 needs_vram == 1);