In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
locking\/lockdep: Fix NULL pointer dereference in __lock_set_class()<\/p>\n
register_lock_class() can return NULL when the lock class pool is
\nexhausted, graph_lock() fails, or key validation fails. However,
\n__lock_set_class() uses the return value directly in pointer arithmetic
\nwithout a NULL check:<\/p>\n
class = register_lock_class(lock, subclass, 0);
\n hlock->class_idx = class – lock_classes;<\/p>\n
If class is NULL, this computes a wild offset that corrupts
\nhlock->class_idx. The subsequent reacquire_held_locks() call will
\ninvoke hlock_class() with this corrupted index, leading to a NULL or
\nout-of-bounds pointer dereference.<\/p>\n
Add the missing NULL check, consistent with how __lock_acquire() already
\nhandles this case at the same call site.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
locking\/lockdep: Fix NULL pointer dereference in __lock_set_class()<\/p>\n
register_lock_class() can return NULL when the lock class pool<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28525","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}