From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40812 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751161AbdAWOhJ (ORCPT ); Mon, 23 Jan 2017 09:37:09 -0500 Subject: Patch "powerpc/ptrace: Preserve previous fprs/vsrs on short regset write" has been added to the 4.9-stable tree To: Dave.Martin@arm.com, gregkh@linuxfoundation.org, mpe@ellerman.id.au Cc: , From: Date: Mon, 23 Jan 2017 15:36:19 +0100 Message-ID: <1485182179153206@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 powerpc/ptrace: Preserve previous fprs/vsrs on short regset write to the 4.9-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: powerpc-ptrace-preserve-previous-fprs-vsrs-on-short-regset-write.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 99dfe80a2a246c600440a815741fd2e74a8b4977 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Thu, 5 Jan 2017 16:50:57 +0000 Subject: powerpc/ptrace: Preserve previous fprs/vsrs on short regset write From: Dave Martin commit 99dfe80a2a246c600440a815741fd2e74a8b4977 upstream. Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET to fill all the registers, the thread's old registers are preserved. Fixes: c6e6771b87d4 ("powerpc: Introduce VSX thread_struct and CONFIG_VSX") Signed-off-by: Dave Martin Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/kernel/ptrace.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -463,6 +463,10 @@ static int fpr_set(struct task_struct *t flush_fp_to_thread(target); + for (i = 0; i < 32 ; i++) + buf[i] = target->thread.TS_FPR(i); + buf[32] = target->thread.fp_state.fpscr; + /* copy to local buffer then write that out */ i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1); if (i) @@ -672,6 +676,9 @@ static int vsr_set(struct task_struct *t flush_altivec_to_thread(target); flush_vsx_to_thread(target); + for (i = 0; i < 32 ; i++) + buf[i] = target->thread.fp_state.fpr[i][TS_VSRLOWOFFSET]; + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, 32 * sizeof(double)); if (!ret) Patches currently in stable-queue which might be from Dave.Martin@arm.com are queue-4.9/arm64-ptrace-preserve-previous-registers-for-short-regset-write-3.patch queue-4.9/arm64-ptrace-reject-attempts-to-set-incomplete-hardware-breakpoint-fields.patch queue-4.9/powerpc-ptrace-preserve-previous-tm-fprs-vsrs-on-short-regset-write.patch queue-4.9/arm64-ptrace-preserve-previous-registers-for-short-regset-write-2.patch queue-4.9/arm64-ptrace-avoid-uninitialised-struct-padding-in-fpr_set.patch queue-4.9/arm64-ptrace-preserve-previous-registers-for-short-regset-write.patch queue-4.9/powerpc-ptrace-preserve-previous-fprs-vsrs-on-short-regset-write.patch