---

yaml --- r: 200126 b: refs/heads/master c: 3bafeb6 h: refs/heads/master v: v3
git-mirror · Jun 5, 2010 · f07a3c0 · f07a3c0
1 parent 9a175e4
commit f07a3c0
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Showing 2 changed files with 8 additions and 6 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 75676500f8298f0ee89db12db97294883c4b768e
+refs/heads/master: 3bafeb6247042dcbb72b0141ec7c7107de9f0b99
diff --git a/trunk/kernel/module.c b/trunk/kernel/module.c
@@ -2226,11 +2226,6 @@ static noinline struct module *load_module(void __user *umod,
 		goto free_mod;
 	}
 
-	if (find_module(mod->name)) {
-		err = -EEXIST;
-		goto free_mod;
-	}
-
 	mod->state = MODULE_STATE_COMING;
 
 	/* Allow arches to frob section contents and sizes.  */
@@ -2509,6 +2504,12 @@ static noinline struct module *load_module(void __user *umod,
 	 * The mutex protects against concurrent writers.
 	 */
 	mutex_lock(&module_mutex);
+	if (find_module(mod->name)) {
+		err = -EEXIST;
+		/* This will also unlock the mutex */
+		goto already_exists;
+	}
+
 	list_add_rcu(&mod->list, &modules);
 	mutex_unlock(&module_mutex);
 
@@ -2535,6 +2536,7 @@ static noinline struct module *load_module(void __user *umod,
 	mutex_lock(&module_mutex);
 	/* Unlink carefully: kallsyms could be walking list. */
 	list_del_rcu(&mod->list);
+ already_exists:
 	mutex_unlock(&module_mutex);
 	synchronize_sched();
 	module_arch_cleanup(mod);