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] 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(+)

(limited to 'kernel')

diff --git a/kernel/module.c b/kernel/module.c
index e058aedf6b93..5aad477ddc79 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;
-- 
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