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drm/nouveau: prime: fix refcount underflow
Calling nouveau_bo_ref() on a nouveau_bo without initializing it (and hence the backing ttm_bo) leads to a refcount underflow. Instead of calling nouveau_bo_ref() in the unwind path of drm_gem_object_init(), clean things up manually. Fixes:ab9ccb96a6
("drm/nouveau: use prime helpers") Reviewed-by: Ben Skeggs <bskeggs@nvidia.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Danilo Krummrich <dakr@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240718165959.3983-2-dakr@kernel.org (cherry picked from commit1b93f3e89d
) Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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@ -64,7 +64,8 @@ struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
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* to the caller, instead of a normal nouveau_bo ttm reference. */
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ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
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if (ret) {
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nouveau_bo_ref(NULL, &nvbo);
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drm_gem_object_release(&nvbo->bo.base);
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kfree(nvbo);
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obj = ERR_PTR(-ENOMEM);
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goto unlock;
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}
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