From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:37826 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751569AbdBJVJt (ORCPT ); Fri, 10 Feb 2017 16:09:49 -0500 Subject: Patch "ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write" has been added to the 4.4-stable tree To: Dave.Martin@arm.com, gregkh@linuxfoundation.org, rmk+kernel@arm.linux.org.uk, rmk+kernel@armlinux.org.uk Cc: , From: Date: Fri, 10 Feb 2017 22:09:44 +0100 Message-ID: <1486760984125173@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write 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-8643-3-arm-ptrace-preserve-previous-registers-for-short-regset-write.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 know about it. >>From 228dbbfb5d77f8e047b2a1d78da14b7158433027 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Wed, 18 Jan 2017 17:11:56 +0100 Subject: ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write From: Dave Martin commit 228dbbfb5d77f8e047b2a1d78da14b7158433027 upstream. Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET to fill all the registers, the thread's old registers are preserved. Fixes: 5be6f62b0059 ("ARM: 6883/1: ptrace: Migrate to regsets framework") Signed-off-by: Dave Martin Acked-by: Russell King Signed-off-by: Russell King Signed-off-by: Greg Kroah-Hartman --- arch/arm/kernel/ptrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -600,7 +600,7 @@ static int gpr_set(struct task_struct *t const void *kbuf, const void __user *ubuf) { int ret; - struct pt_regs newregs; + struct pt_regs newregs = *task_pt_regs(target); ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, Patches currently in stable-queue which might be from Dave.Martin@arm.com are queue-4.4/arm-8643-3-arm-ptrace-preserve-previous-registers-for-short-regset-write.patch