drm/nouveau: fix a use-after-free in nouveaugemprimeimportsg_table()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.220 by commit 56ee9577915dc06f55309901012a9ef68dbdb5a8, it was introduced in version v5.4 by commit 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5. For more details please see the references link.