From 8e08b756869eeb08ace17ad64c2a8cb97b18e856 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@osdl.org>
Date: Tue, 7 Feb 2006 12:58:45 -0800
Subject: [PATCH] [PATCH] module: strlen_user() race fix
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
kernel/module.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/module.c b/kernel/module.c
index e058aedf6b932..5aad477ddc79c 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1670,6 +1670,9 @@ static struct module *load_module(void __user *umod,
goto free_mod;
}
+ /* Userspace could have altered the string after the strlen_user() */
+ args[arglen - 1] = '\0';
+
if (find_module(mod->name)) {
err = -EEXIST;
goto free_mod;
--
2.30.2