From patchwork Thu Jan 16 23:16:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 233686 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 4582FC33CAF for ; Thu, 16 Jan 2020 23:46:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1A20720748 for ; Thu, 16 Jan 2020 23:46:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579218391; bh=KnNF++O83Xcivapna5ZWxJ3A/nCVJ2nlj6WaYyZBObc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=uUbVvR746ucjxYuWpz8MjhL2ghQRZ76TTnByvqfJDSjl3uy5qOjOKXFz4Y8xC8+2c loDzxZNQIUHiR20EJTb4an8884d4H3RHLspz3p309ttts+yTfsnv73ilGkr88okoUW xx8diD+RVbSt+Xb2+95J/OmceMJ6DLYQUZO/Eqxg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729583AbgAPXq0 (ORCPT ); Thu, 16 Jan 2020 18:46:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:49634 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390881AbgAPXV7 (ORCPT ); Thu, 16 Jan 2020 18:21:59 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7A63E2087E; Thu, 16 Jan 2020 23:21:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579216917; bh=KnNF++O83Xcivapna5ZWxJ3A/nCVJ2nlj6WaYyZBObc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JG4l0MhdL6qrS9D0QEDOHURKZn32BtDxJbBXJ07uoaYlwtzk+Tb7SUCDTiGcF5ZaU /nS6H1HUhHwTsc7EF152yVcgij6DKelSUtxNqY01INMUFZp0xsLRn8CzEORiXc73cB Jv+8jMCJloVcTeT0UixXQmc1SfhsUHMPXHDqQfj8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andy Lutomirski , Sami Tolvanen , Borislav Petkov , "H . Peter Anvin" , Kees Cook , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , Ingo Molnar Subject: [PATCH 5.4 047/203] syscalls/x86: Wire up COMPAT_SYSCALL_DEFINE0 Date: Fri, 17 Jan 2020 00:16:04 +0100 Message-Id: <20200116231748.097040033@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200116231745.218684830@linuxfoundation.org> References: <20200116231745.218684830@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Andy Lutomirski commit cf3b83e19d7c928e05a5d193c375463182c6029a upstream. x86 has special handling for COMPAT_SYSCALL_DEFINEx, but there was no override for COMPAT_SYSCALL_DEFINE0. Wire it up so that we can use it for rt_sigreturn. Signed-off-by: Andy Lutomirski Signed-off-by: Sami Tolvanen Cc: Borislav Petkov Cc: H . Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: https://lkml.kernel.org/r/20191008224049.115427-3-samitolvanen@google.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/include/asm/syscall_wrapper.h | 32 ++++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) --- a/arch/x86/include/asm/syscall_wrapper.h +++ b/arch/x86/include/asm/syscall_wrapper.h @@ -28,13 +28,21 @@ * kernel/sys_ni.c and SYS_NI in kernel/time/posix-stubs.c to cover this * case as well. */ +#define __IA32_COMPAT_SYS_STUB0(x, name) \ + asmlinkage long __ia32_compat_sys_##name(const struct pt_regs *regs);\ + ALLOW_ERROR_INJECTION(__ia32_compat_sys_##name, ERRNO); \ + asmlinkage long __ia32_compat_sys_##name(const struct pt_regs *regs)\ + { \ + return __se_compat_sys_##name(); \ + } + #define __IA32_COMPAT_SYS_STUBx(x, name, ...) \ asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs);\ ALLOW_ERROR_INJECTION(__ia32_compat_sys##name, ERRNO); \ asmlinkage long __ia32_compat_sys##name(const struct pt_regs *regs)\ { \ return __se_compat_sys##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\ - } \ + } #define __IA32_SYS_STUBx(x, name, ...) \ asmlinkage long __ia32_sys##name(const struct pt_regs *regs); \ @@ -76,15 +84,24 @@ * of the x86-64-style parameter ordering of x32 syscalls. The syscalls common * with x86_64 obviously do not need such care. */ +#define __X32_COMPAT_SYS_STUB0(x, name, ...) \ + asmlinkage long __x32_compat_sys_##name(const struct pt_regs *regs);\ + ALLOW_ERROR_INJECTION(__x32_compat_sys_##name, ERRNO); \ + asmlinkage long __x32_compat_sys_##name(const struct pt_regs *regs)\ + { \ + return __se_compat_sys_##name();\ + } + #define __X32_COMPAT_SYS_STUBx(x, name, ...) \ asmlinkage long __x32_compat_sys##name(const struct pt_regs *regs);\ ALLOW_ERROR_INJECTION(__x32_compat_sys##name, ERRNO); \ asmlinkage long __x32_compat_sys##name(const struct pt_regs *regs)\ { \ return __se_compat_sys##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\ - } \ + } #else /* CONFIG_X86_X32 */ +#define __X32_COMPAT_SYS_STUB0(x, name) #define __X32_COMPAT_SYS_STUBx(x, name, ...) #endif /* CONFIG_X86_X32 */ @@ -95,6 +112,17 @@ * mapping of registers to parameters, we need to generate stubs for each * of them. */ +#define COMPAT_SYSCALL_DEFINE0(name) \ + static long __se_compat_sys_##name(void); \ + static inline long __do_compat_sys_##name(void); \ + __IA32_COMPAT_SYS_STUB0(x, name) \ + __X32_COMPAT_SYS_STUB0(x, name) \ + static long __se_compat_sys_##name(void) \ + { \ + return __do_compat_sys_##name(); \ + } \ + static inline long __do_compat_sys_##name(void) + #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ static long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\