[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <3b10f99f.aa01.15da8632dec.Coremail.sohu0106@126.com>
Date: Thu, 3 Aug 2017 21:57:38 +0800 (CST)
From: sohu0106 <sohu0106@....com>
To: schwidefsky@...ibm.com, heiko.carstens@...ibm.com
Cc: linux-s390@...r.kernel.org, torvalds@...ux-foundation.org,
linux-kernel@...r.kernel.org
Subject: drivers/s390/char/keyboard.c NULL pointer reference
Local users able to send the NULL arg argument to kbd_ioctl(), which could cause kernel crash
diff --git a/keyboard.c
b/keyboard.c
index ba0e4f9..3ec16b1 100644
--- a/keyboard.c
+++ b/keyboard.c
@@ -456,6 +456,8 @@ int kbd_ioctl(struct kbd_data *kbd, unsigned int cmd, unsigned long arg)
int perm;
argp = (void __user *)arg;
+ if( !argp )
+ return -EFAULT;
/*
* To have permissions to do most of the vt ioctls, we either have
https://bugzilla.kernel.org/show_bug.cgi?id=196575
Powered by blists - more mailing lists