From: Miroslav Benes mbenes@suse.cz
[ Upstream commit 4ff96fb52c6964ad42e0a878be8f86a2e8052ddd ]
klp_module_coming() is called for every module appearing in the system. It sets obj->mod to a patched module for klp_object obj. Unfortunately it leaves it set even if an error happens later in the function and the patched module is not allowed to be loaded.
klp_is_object_loaded() uses obj->mod variable and could currently give a wrong return value. The bug is probably harmless as of now.
Signed-off-by: Miroslav Benes mbenes@suse.cz Reviewed-by: Petr Mladek pmladek@suse.com Acked-by: Josh Poimboeuf jpoimboe@redhat.com Signed-off-by: Petr Mladek pmladek@suse.com Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/livepatch/core.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index 722c27c40e5b3..a1250ad591c1d 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -1027,6 +1027,7 @@ int klp_module_coming(struct module *mod) pr_warn("patch '%s' failed for module '%s', refusing to load module '%s'\n", patch->mod->name, obj->mod->name, obj->mod->name); mod->klp_alive = false; + obj->mod = NULL; klp_cleanup_module_patches_limited(mod, patch); mutex_unlock(&klp_mutex);