Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livep...

Pull livepatching fixes from Jiri Kosina:
 "Two tiny fixes for livepatching infrastructure:

   - extending RCU critical section to cover all accessess to
     RCU-protected variable, by Petr Mladek

   - proper format string passing to kobject_init_and_add(), by Jiri
     Kosina"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: RCU protect struct klp_func all the time when used in klp_ftrace_handler()
  livepatch: fix format string in kobject_init_and_add()

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index ff7f47d026ac48b21d6239f9db36ee8662585a45..782172f073c5ed4bde5318bf96777ee79c618b89 100644 (file)
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -314,12 +314,12 @@ static void notrace klp_ftrace_handler(unsigned long ip,
        rcu_read_lock();
        func = list_first_or_null_rcu(&ops->func_stack, struct klp_func,
                                      stack_node);
-       rcu_read_unlock();
-
        if (WARN_ON_ONCE(!func))
-               return;
+               goto unlock;
 
        klp_arch_set_pc(regs, (unsigned long)func->new_func);
+unlock:
+       rcu_read_unlock();
 }
 
 static int klp_disable_func(struct klp_func *func)
@@ -731,7 +731,7 @@ static int klp_init_func(struct klp_object *obj, struct klp_func *func)
        func->state = KLP_DISABLED;
 
        return kobject_init_and_add(&func->kobj, &klp_ktype_func,
-                                   obj->kobj, func->old_name);
+                                   obj->kobj, "%s", func->old_name);
 }
 
 /* parts of the initialization that is done only when the object is loaded */
@@ -807,7 +807,7 @@ static int klp_init_patch(struct klp_patch *patch)
        patch->state = KLP_DISABLED;
 
        ret = kobject_init_and_add(&patch->kobj, &klp_ktype_patch,
-                                  klp_root_kobj, patch->mod->name);
+                                  klp_root_kobj, "%s", patch->mod->name);
        if (ret)
                goto unlock;