drm/vmwgfx: fix a memleak in vmw_gmrid_man_get_node

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>
Signed-off-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231204091416.3308430-1-alexious@zju.edu.cn

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
index ceb4d3d3b965aacb7c0794b9dc7d9a6ad09b4098..a0b47c9b33f552a6d8022596c4acd6ec3420909d 100644 (file)
--- 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);