Message ID | 20230616125730.1164989-5-nik.borisov@suse.com |
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State | New |
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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i12-20020a63a84c000000b0054392750edfsi3092249pgp.744.2023.06.16.06.14.54; Fri, 16 Jun 2023 06:15:07 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b=ApQssAVD; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=suse.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345546AbjFPM6E (ORCPT <rfc822;maxin.john@gmail.com> + 99 others); Fri, 16 Jun 2023 08:58:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49018 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345513AbjFPM5y (ORCPT <rfc822;linux-kernel@vger.kernel.org>); Fri, 16 Jun 2023 08:57:54 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 898F5358C for <linux-kernel@vger.kernel.org>; Fri, 16 Jun 2023 05:57:53 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 071211F8AC; Fri, 16 Jun 2023 12:57:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1686920272; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uebKOiOaouuF4hP+m2W8QMLwwo8lvdplmN5LTEefmQs=; b=ApQssAVDFiBkb791JaTp+XIxktjd23BYoBaEWhjnIkcR4UR6Ziljlnuq8PkAWp36ZWfp7h jRcdbUm7Ja7zjBEJRkdn4nGYBEExEXV4DKGne1uxAa6iUzNJXHCIvyNcaMiWdhX2FpuraS puIfvomTJiZ+hOjOPGeaATq5oWT8POs= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id A41371330B; Fri, 16 Jun 2023 12:57:51 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id aHRnJU9cjGTjNwAAMHmgww (envelope-from <nik.borisov@suse.com>); Fri, 16 Jun 2023 12:57:51 +0000 From: Nikolay Borisov <nik.borisov@suse.com> To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, mhocko@suse.com, jslaby@suse.cz, Nikolay Borisov <nik.borisov@suse.com> Subject: [PATCH v3 4/5] x86/elf: Make loading of 32bit processes depend on ia32_enabled() Date: Fri, 16 Jun 2023 15:57:29 +0300 Message-Id: <20230616125730.1164989-5-nik.borisov@suse.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230616125730.1164989-1-nik.borisov@suse.com> References: <20230616125730.1164989-1-nik.borisov@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1768865196986460786?= X-GMAIL-MSGID: =?utf-8?q?1768865196986460786?= |
Series |
Make IA32_EMULATION boot time overridable
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Commit Message
Nikolay Borisov
June 16, 2023, 12:57 p.m. UTC
Major aspect of ia32 emulation is the ability to load 32bit processes.
That's currently decided (among others) by compat_elf_check_arch().
Make this macro also consider the runtime state of ia32 emulation before
allowing to load a 32bit process.
Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
---
arch/x86/include/asm/elf.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h index 18fd06f7936a..a0234dfd1031 100644 --- a/arch/x86/include/asm/elf.h +++ b/arch/x86/include/asm/elf.h @@ -7,6 +7,7 @@ */ #include <linux/thread_info.h> +#include <asm/ia32.h> #include <asm/ptrace.h> #include <asm/user.h> #include <asm/auxvec.h> @@ -149,7 +150,7 @@ do { \ ((x)->e_machine == EM_X86_64) #define compat_elf_check_arch(x) \ - (elf_check_arch_ia32(x) || \ + ((elf_check_arch_ia32(x) && ia32_enabled()) || \ (IS_ENABLED(CONFIG_X86_X32_ABI) && (x)->e_machine == EM_X86_64)) static inline void elf_common_init(struct thread_struct *t,