CVE-2022-49914

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> btrfs: fix inode list leak during backref walking at resolve_indirect_refs()<br /> <br /> During backref walking, at resolve_indirect_refs(), if we get an error<br /> we jump to the &amp;#39;out&amp;#39; label and call ulist_free() on the &amp;#39;parents&amp;#39; ulist,<br /> which frees all the elements in the ulist - however that does not free<br /> any inode lists that may be attached to elements, through the &amp;#39;aux&amp;#39; field<br /> of a ulist node, so we end up leaking lists if we have any attached to<br /> the unodes.<br /> <br /> Fix this by calling free_leaf_list() instead of ulist_free() when we exit<br /> from resolve_indirect_refs(). The static function free_leaf_list() is<br /> moved up for this to be possible and it&amp;#39;s slightly simplified by removing<br /> unnecessary code.