CVE-2026-64021

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/oa: Fix exec_queue leak on width check in stream open

In xeoastreamopenioctl(), when param.execq->width > 1 the function returns -EOPNOTSUPP directly, skipping the existing errexecq cleanup path. The execqueue reference obtained by xeexecqueue_lookup() is leaked.

The exec queue holds a reference on the xefile, which is only dropped during queue teardown. The leaked lookup ref is not on the file's execqueue xarray, so file close cannot release it. This keeps both the exec queue and the file private state pinned indefinitely.

Jump to errexecq instead of returning directly so the reference is released.

(cherry picked from commit 339fa0be9e4a5d69fa47e91f4a36574224fb478f)