diff mbox series

[v2] drm/vmwgfx: fix a memleak in vmw_gmrid_man_get_node

Message ID 20231204091416.3308430-1-alexious@zju.edu.cn
State New
Headers
Series [v2] drm/vmwgfx: fix a memleak in vmw_gmrid_man_get_node |

Commit Message

Zhipeng Lu Dec. 4, 2023, 9:14 a.m. UTC 
  When ida_alloc_max fails, resources allocated before should be freed,
including *res allocated by kmalloc and ttm_resource_init.

Fixes: d3bcb4b02fe9 ("drm/vmwgfx: switch the TTM backends to self alloc")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
---

Changelog:

v2: Adding {} to correct the if statement
---
 drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Zack Rusin Jan. 4, 2024, 3:28 a.m. UTC | #1 
On Mon, Dec 4, 2023 at 4:15 AM Zhipeng Lu <alexious@zju.edu.cn> wrote:
>
> When ida_alloc_max fails, resources allocated before should be freed,
> including *res allocated by kmalloc and ttm_resource_init.
>
> Fixes: d3bcb4b02fe9 ("drm/vmwgfx: switch the TTM backends to self alloc")
> Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
> ---
>
> Changelog:
>
> v2: Adding {} to correct the if statement
> ---
>  drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
> index ceb4d3d3b965..a0b47c9b33f5 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
> @@ -64,8 +64,11 @@ static int vmw_gmrid_man_get_node(struct ttm_resource_manager *man,
>         ttm_resource_init(bo, place, *res);
>
>         id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
> -       if (id < 0)
> +       if (id < 0) {
> +               ttm_resource_fini(man, *res);
> +               kfree(*res);
>                 return id;
> +       }
>
>         spin_lock(&gman->lock);

Thanks, I pushed it to drm-misc-next.

z
diff mbox series

Patch

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
index ceb4d3d3b965..a0b47c9b33f5 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
@@ -64,8 +64,11 @@  static int vmw_gmrid_man_get_node(struct ttm_resource_manager *man,
 	ttm_resource_init(bo, place, *res);
 
 	id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
-	if (id < 0)
+	if (id < 0) {
+		ttm_resource_fini(man, *res);
+		kfree(*res);
 		return id;
+	}
 
 	spin_lock(&gman->lock);