From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE824C43219 for ; Wed, 1 May 2019 20:05:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 96E0420651 for ; Wed, 1 May 2019 20:05:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="fnHCAaSH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726276AbfEAUFJ (ORCPT ); Wed, 1 May 2019 16:05:09 -0400 Received: from mail-pf1-f202.google.com ([209.85.210.202]:48022 "EHLO mail-pf1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726188AbfEAUFI (ORCPT ); Wed, 1 May 2019 16:05:08 -0400 Received: by mail-pf1-f202.google.com with SMTP id c15so7082905pfc.14 for ; Wed, 01 May 2019 13:05:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=MlQndH9JHFu7S8ddgNAyiZUD6B/g+xVzIb+RnIGAaWs=; b=fnHCAaSHp7jm7BX0qFctNdwaGrY7oLfabmSkvoB4dtQBJxSdCKtEx2jxC7FIC3GCxO YlgBkWApyHsNLL6q2+7r2CJg2KnpX2OwDbqGgxNeA53OCgvKuTcxuVB48/S3RpXYbdDY xQI022cfV27rAtSh9fzNB5ly9uYCGubQ/ylCHl9zpyxnc+YN2gOllzLs4Xjgd9TiL++l kMDg+NtQ5Q8uH53COQDUocIYQW0e30MTDPCh60KDEcJ33zjTNRHn9njPDqkCGujG/mVs xQ7iK4l6ssYko9wzto0NLq97Khegf/K37bxoKrlRFtekyZwm6Khlvp/QHuQOSfA9pGKn uedg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=MlQndH9JHFu7S8ddgNAyiZUD6B/g+xVzIb+RnIGAaWs=; b=Dvj+nstUczFl8Kvwtl5K9SoTAEc6my6EWg99BeP+/lygJdPwMnKTM+q6HHRWYbC70y BMnPqkN1Qx90gtJWRhdI/JVbQGusD8wdja16kgXCCHX2tYpdzFWqH33xCTE3yIWuL6VV GV5K40QXSEOFZUEGIO7lFFRShclyxtrGeBFTq7i/WSXuhGGPmC8r459pl0ZMRexlNt9U r6WivOnDZcWUxzm03hHpIeRWBlueKqwU6WcGhyKoXKT/bkHLsUudqXITBeVgv5mPvgey UFfEwPsXqeW2HxzsXG+KI+cMVi5pn+f07zkuiEonQXru3/LwzZThlq1ZzNVCCq3d0AGx GuGA== X-Gm-Message-State: APjAAAXhUmDORcRV7V55LEj38KNczal14Ezp/CvG3Qy5rpaxtYg5Gh/2 5f/vO8ZiGZ9yFDI+A0RXGuDPQwVBrKs/ic6n5Zc= X-Google-Smtp-Source: APXvYqwBclqb9p4MTO0VP/jDbcmcoD0wl/ivARDRHYgzxLNfoOJhYoTrwu/lUR7tBPdfO3m6nARfIKPs1tbACW0AiWU= X-Received: by 2002:a63:da51:: with SMTP id l17mr34321605pgj.115.1556741107820; Wed, 01 May 2019 13:05:07 -0700 (PDT) Date: Wed, 1 May 2019 13:04:51 -0700 In-Reply-To: <20190501200451.255615-1-samitolvanen@google.com> Message-Id: <20190501200451.255615-3-samitolvanen@google.com> Mime-Version: 1.0 References: <20190501200451.255615-1-samitolvanen@google.com> X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog Subject: [PATCH 2/2] arm64: use the correct function type in SYSCALL_DEFINE0 From: Sami Tolvanen To: Catalin Marinas , Will Deacon Cc: Kees Cook , Nick Desaulniers , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Although a syscall defined using SYSCALL_DEFINE0 doesn't accept parameters, use the correct function type to avoid indirect call type mismatches with Control-Flow Integrity checking. Signed-off-by: Sami Tolvanen --- arch/arm64/include/asm/syscall_wrapper.h | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/arch/arm64/include/asm/syscall_wrapper.h b/arch/arm64/include/asm/syscall_wrapper.h index a4477e515b798..507d0ee6bc690 100644 --- a/arch/arm64/include/asm/syscall_wrapper.h +++ b/arch/arm64/include/asm/syscall_wrapper.h @@ -30,10 +30,10 @@ } \ static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) -#define COMPAT_SYSCALL_DEFINE0(sname) \ - asmlinkage long __arm64_compat_sys_##sname(void); \ - ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \ - asmlinkage long __arm64_compat_sys_##sname(void) +#define COMPAT_SYSCALL_DEFINE0(sname) \ + asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused); \ + ALLOW_ERROR_INJECTION(__arm64_compat_sys_##sname, ERRNO); \ + asmlinkage long __arm64_compat_sys_##sname(const struct pt_regs *__unused) #define COND_SYSCALL_COMPAT(name) \ cond_syscall(__arm64_compat_sys_##name); @@ -62,11 +62,11 @@ static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) #ifndef SYSCALL_DEFINE0 -#define SYSCALL_DEFINE0(sname) \ - SYSCALL_METADATA(_##sname, 0); \ - asmlinkage long __arm64_sys_##sname(void); \ - ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \ - asmlinkage long __arm64_sys_##sname(void) +#define SYSCALL_DEFINE0(sname) \ + SYSCALL_METADATA(_##sname, 0); \ + asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused); \ + ALLOW_ERROR_INJECTION(__arm64_sys_##sname, ERRNO); \ + asmlinkage long __arm64_sys_##sname(const struct pt_regs *__unused) #endif #ifndef COND_SYSCALL -- 2.21.0.593.g511ec345e18-goog