CVE-2023-53681

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent<br /> <br /> In some specific situations, the return value of __bch_btree_node_alloc<br /> may be NULL. This may lead to a potential NULL pointer dereference in<br /> caller function like a calling chain :<br /> btree_split-&gt;bch_btree_node_alloc-&gt;__bch_btree_node_alloc.<br /> <br /> Fix it by initializing the return value in __bch_btree_node_alloc.