From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out3-smtp.messagingengine.com ([66.111.4.27]:34009 "EHLO out3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932899AbeAJMMY (ORCPT ); Wed, 10 Jan 2018 07:12:24 -0500 Subject: FAILED: patch "[PATCH] MIPS: Disallow outsized PTRACE_SETREGSET NT_PRFPREG regset" failed to apply to 3.18-stable tree To: macro@mips.com, Dave.Martin@arm.com, Paul.Burton@mips.com, alex@alex-smith.me.uk, james.hogan@mips.com, ralf@linux-mips.org Cc: From: Date: Wed, 10 Jan 2018 13:12:26 +0100 Message-ID: <1515586346110180@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: The patch below does not apply to the 3.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >>From c8c5a3a24d395b14447a9a89d61586a913840a3b Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Mon, 11 Dec 2017 22:56:54 +0000 Subject: [PATCH] MIPS: Disallow outsized PTRACE_SETREGSET NT_PRFPREG regset accesses Complement commit c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use correct core dump register layout") and also reject outsized PTRACE_SETREGSET requests to the NT_PRFPREG regset, like with the NT_PRSTATUS regset. Signed-off-by: Maciej W. Rozycki Fixes: c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use correct core dump register layout") Cc: James Hogan Cc: Paul Burton Cc: Alex Smith Cc: Dave Martin Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org # v3.17+ Patchwork: https://patchwork.linux-mips.org/patch/17930/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c index 256908951a7c..0b23b1ad99e6 100644 --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -550,6 +550,9 @@ static int fpr_set(struct task_struct *target, BUG_ON(count % sizeof(elf_fpreg_t)); + if (pos + count > sizeof(elf_fpregset_t)) + return -EIO; + init_fp_ctx(target); if (sizeof(target->thread.fpu.fpr[0]) == sizeof(elf_fpreg_t))