CVE-2022-50300

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> btrfs: fix extent map use-after-free when handling missing device in read_one_chunk<br /> <br /> Store the error code before freeing the extent_map. Though it&amp;#39;s<br /> reference counted structure, in that function it&amp;#39;s the first and last<br /> allocation so this would lead to a potential use-after-free.<br /> <br /> The error can happen eg. when chunk is stored on a missing device and<br /> the degraded mount option is missing.<br /> <br /> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721