Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753115AbdCFJMm (ORCPT ); Mon, 6 Mar 2017 04:12:42 -0500 Received: from mx2.suse.de ([195.135.220.15]:37182 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753013AbdCFJM3 (ORCPT ); Mon, 6 Mar 2017 04:12:29 -0500 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Dave Martin , Chris Metcalf , Jiri Slaby Subject: [PATCH 3.12 005/113] tile/ptrace: Preserve previous registers for short regset write Date: Mon, 6 Mar 2017 10:10:29 +0100 Message-Id: X-Mailer: git-send-email 2.12.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1043 Lines: 34 From: Dave Martin 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit fd7c99142d77dc4a851879a66715abf12a3193fb upstream. Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET to fill all the registers, the thread's old registers are preserved. Signed-off-by: Dave Martin Signed-off-by: Chris Metcalf Signed-off-by: Jiri Slaby --- arch/tile/kernel/ptrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index de98c6ddf136..2343126c4ad2 100644 --- a/arch/tile/kernel/ptrace.c +++ b/arch/tile/kernel/ptrace.c @@ -110,7 +110,7 @@ static int tile_gpr_set(struct task_struct *target, const void *kbuf, const void __user *ubuf) { int ret; - struct pt_regs regs; + struct pt_regs regs = *task_pt_regs(target); ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®s, 0, sizeof(regs)); -- 2.12.0