Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753619AbdFGXTO (ORCPT ); Wed, 7 Jun 2017 19:19:14 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:50831 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752769AbdFGXGE (ORCPT ); Wed, 7 Jun 2017 19:06:04 -0400 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux@roeck-us.net Cc: Dave Martin , Catalin Marinas , Willy Tarreau Subject: [PATCH 3.10 101/250] arm64/ptrace: Avoid uninitialised struct padding in fpr_set() Date: Thu, 8 Jun 2017 00:58:07 +0200 Message-Id: <1496876436-32402-102-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1496876436-32402-1-git-send-email-w@1wt.eu> References: <1496876436-32402-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1065 Lines: 34 From: Dave Martin commit aeb1f39d814b2e21e5e5706a48834bfd553d0059 upstream. This patch adds an explicit __reserved[] field to user_fpsimd_state to replace what was previously unnamed padding. This ensures that data in this region are propagated across assignment rather than being left possibly uninitialised at the destination. Fixes: 60ffc30d5652 ("arm64: Exception handling") Signed-off-by: Dave Martin Acked-by: Will Deacon Signed-off-by: Catalin Marinas Signed-off-by: Willy Tarreau --- arch/arm64/include/uapi/asm/ptrace.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h index 6913643..c136fd5 100644 --- a/arch/arm64/include/uapi/asm/ptrace.h +++ b/arch/arm64/include/uapi/asm/ptrace.h @@ -75,6 +75,7 @@ struct user_fpsimd_state { __uint128_t vregs[32]; __u32 fpsr; __u32 fpcr; + __u32 __reserved[2]; }; struct user_hwdebug_state { -- 2.8.0.rc2.1.gbe9624a