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drm/gem: fix race between change_handle and handle_delete

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From Zhenghang Xiao
0dfa42cfe4dbe114533480503934f43e33c1e83d in linux-6.18.y/6.18.35
7164d78559b0ff29931a366a840a9e5dd53d4b7c in mainline linux
This commit is contained in:
jsg
2026-06-10 00:00:03 +00:00
parent 440984bd8b
commit 05602d53a4
1 changed files with 2 additions and 0 deletions
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sys/dev/pci/drm/drm_gem.c
+2
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@@ -1207,6 +1207,7 @@ int drm_gem_change_handle_ioctl(struct drm_device *dev, void *data,
goto out_unlock;
}
idr_replace(&file_priv->object_idr, NULL, args->handle);
spin_unlock(&file_priv->table_lock);
if (obj->dma_buf) {
@@ -1215,6 +1216,7 @@ int drm_gem_change_handle_ioctl(struct drm_device *dev, void *data,
if (ret < 0) {
spin_lock(&file_priv->table_lock);
idr_remove(&file_priv->object_idr, handle);
idr_replace(&file_priv->object_idr, obj, args->handle);
spin_unlock(&file_priv->table_lock);
goto out_unlock;
}