CVE-2025-21661

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> gpio: virtuser: fix missing lookup table cleanups<br /> <br /> When a virtuser device is created via configfs and the probe fails due<br /> to an incorrect lookup table, the table is not removed. This prevents<br /> subsequent probe attempts from succeeding, even if the issue is<br /> corrected, unless the device is released. Additionally, cleanup is also<br /> needed in the less likely case of platform_device_register_full()<br /> failure.<br /> <br /> Besides, a consistent memory leak in lookup_table-&gt;dev_id was spotted<br /> using kmemleak by toggling the live state between 0 and 1 with a correct<br /> lookup table.<br /> <br /> Introduce gpio_virtuser_remove_lookup_table() as the counterpart to the<br /> existing gpio_virtuser_make_lookup_table() and call it from all<br /> necessary points to ensure proper cleanup.