From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Martin , "David S. Miller" , Linus Torvalds Subject: [PATCH 4.4 09/14] sparc/ptrace: Preserve previous registers for short regset write Date: Thu, 30 Mar 2017 11:58:43 +0200 Message-Id: <20170330094946.487865710@linuxfoundation.org> In-Reply-To: <20170330094944.906915050@linuxfoundation.org> References: <20170330094944.906915050@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Martin commit d3805c546b275c8cc7d40f759d029ae92c7175f2 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 Acked-by: David S. Miller Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- arch/sparc/kernel/ptrace_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/sparc/kernel/ptrace_64.c +++ b/arch/sparc/kernel/ptrace_64.c @@ -311,7 +311,7 @@ static int genregs64_set(struct task_str } if (!ret) { - unsigned long y; + unsigned long y = regs->y; ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &y,