Patch "ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()" has been added to the 4.4-stable tree

Patch "ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm-8658-1-uaccess-fix-zeroing-of-64-bit-get_user.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 9e3440481845b2ec22508f60837ee2cab2b6054f Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Thu, 16 Feb 2017 01:44:37 +0100
Subject: ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()

From: Kees Cook <keescook@chromium.org>

commit 9e3440481845b2ec22508f60837ee2cab2b6054f upstream.

The 64-bit get_user() wasn't clearing the high word due to a typo in the
error handler. The exception handler entry was already correct, though.
Noticed during recent usercopy test additions in lib/test_user_copy.c.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/lib/getuser.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/lib/getuser.S
+++ b/arch/arm/lib/getuser.S
@@ -67,7 +67,7 @@ ENTRY(__get_user_4)
 ENDPROC(__get_user_4)
 
 ENTRY(__get_user_8)
-	check_uaccess r0, 8, r1, r2, __get_user_bad
+	check_uaccess r0, 8, r1, r2, __get_user_bad8
 #ifdef CONFIG_THUMB2_KERNEL
 5: TUSER(ldr)	r2, [r0]
 6: TUSER(ldr)	r3, [r0, #4]


Patches currently in stable-queue which might be from keescook@chromium.org are

queue-4.4/arm-8658-1-uaccess-fix-zeroing-of-64-bit-get_user.patch