From patchwork Wed Oct 11 20:30:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Garnier X-Patchwork-Id: 10000521 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B269F6037F for ; Wed, 11 Oct 2017 20:32:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A663728B69 for ; Wed, 11 Oct 2017 20:32:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 99F2828B6B; Wed, 11 Oct 2017 20:32:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.wl.linuxfoundation.org (Postfix) with SMTP id 0AD1328B69 for ; Wed, 11 Oct 2017 20:32:25 +0000 (UTC) Received: (qmail 13636 invoked by uid 550); 11 Oct 2017 20:31:20 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Delivered-To: mailing list kernel-hardening@lists.openwall.com Received: (qmail 13444 invoked from network); 11 Oct 2017 20:31:18 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=D6+JfAz2FkDl//aPUpV+4VR6Xs/xf1uL9r4NEZajg1k=; b=LW7e4qtyJhEgfxXWTjrQpSQMNIt0c1om+zjmVZ8V4/7W86QtlWXoLTGjXhc270R1xw jVBWfGXsZegQd6NndtgQ0lupIeCyOXIB/jT8UEfuiodtAGKIwOSMNeleL0eJMU3Rsnm5 M0xddg2TZ5/NbGJiganv+C/PLz7FhK6XfmHoOC0+xRqg6KLXRvyx9VTA46FWKmvFJBTP 8ljZBmUOAwBte+4dJhSl6tOuJjDPDwPk0UJf/hobuZg3UlImRyqFu9dYBbVvybploYo/ VnwUopNh+GJHT5hXvZaoC+9rnD25prWtu3itOMdSW+X8UpfgBbERrtRyJoHD6gTYswZD LDdw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=D6+JfAz2FkDl//aPUpV+4VR6Xs/xf1uL9r4NEZajg1k=; b=ZQICyVOyBznm3YnYJDwOMgTwy1thZz7PVyHmDduD0Nz4ybSqx3NUvuGAamlZoMoHQO LhXokTpe2SC8FYMbq8k56927J6ohUeotoG65PJtA2+0yqqsJU0SxD1iBFTYKwExKSyye xzlZJAvwMDAb38eLcBvJSS0ORuFEwIFOKcMCwYgI62tbe8SSl3Mr19MuwGZLtbRvruQI H/pj133V7uoHuzeZ/451qCrax1AtPV9iHd95JeveH8tErU8Kd8EqSIGNe37Y7G+11Kpc HgRuSYyW3jZuHGmbkWi25u7/X/Q41JWqSIUdRpsp5snz+IQFaqmydXsjR9Ctdvb1cNsc jzBw== X-Gm-Message-State: AMCzsaVqGboQO/4tz3NCpksKyAHcf8FKRPI5L0dYUWM3As8oX8AQTfe3 v/UT7Cs7tQANgDvvb8t9X9fRJg== X-Google-Smtp-Source: AOwi7QBuv8Lyc0cI6NxZmvhUjxovQzgFIoP7DRpP+KZBrCMZyMk0kBWE55kZ61sxYeGzhxMlPhAQ5g== X-Received: by 10.99.119.199 with SMTP id s190mr190084pgc.110.1507753865951; Wed, 11 Oct 2017 13:31:05 -0700 (PDT) From: Thomas Garnier To: Herbert Xu , "David S . Miller" , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Peter Zijlstra , Josh Poimboeuf , Arnd Bergmann , Thomas Garnier , Kees Cook , Andrey Ryabinin , Matthias Kaehlcke , Tom Lendacky , Andy Lutomirski , "Kirill A . Shutemov" , Borislav Petkov , "Rafael J . Wysocki" , Len Brown , Pavel Machek , Juergen Gross , Chris Wright , Alok Kataria , Rusty Russell , Tejun Heo , Christoph Lameter , Boris Ostrovsky , Paul Gortmaker , Andrew Morton , Alexey Dobriyan , "Paul E . McKenney" , Nicolas Pitre , Borislav Petkov , "Luis R . Rodriguez" , Greg Kroah-Hartman , Christopher Li , Steven Rostedt , Jason Baron , Mika Westerberg , Dou Liyang , "Rafael J . Wysocki" , Lukas Wunner , Masahiro Yamada , Alexei Starovoitov , Daniel Borkmann , Markus Trippelsdorf , Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Joerg Roedel , Rik van Riel , David Howells , Ard Biesheuvel , Waiman Long , Kyle Huey , Jonathan Corbet , Michal Hocko , Peter Foley , Paul Bolle , Jiri Kosina , "H . J . Lu" , Rob Landley , Baoquan He , =?UTF-8?q?Jan=20H=20=2E=20Sch=C3=B6nherr?= , Daniel Micay Cc: x86@kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, linux-arch@vger.kernel.org, linux-sparse@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com Date: Wed, 11 Oct 2017 13:30:02 -0700 Message-Id: <20171011203027.11248-3-thgarnie@google.com> X-Mailer: git-send-email 2.15.0.rc0.271.g36b669edcc-goog In-Reply-To: <20171011203027.11248-1-thgarnie@google.com> References: <20171011203027.11248-1-thgarnie@google.com> Subject: [kernel-hardening] [PATCH v1 02/27] x86: Use symbol name on bug table for PIE support X-Virus-Scanned: ClamAV using ClamSMTP Replace the %c constraint with %P. The %c is incompatible with PIE because it implies an immediate value whereas %P reference a symbol. Position Independent Executable (PIE) support will allow to extended the KASLR randomization range below the -2G memory limit. Signed-off-by: Thomas Garnier --- arch/x86/include/asm/bug.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/bug.h b/arch/x86/include/asm/bug.h index aa6b2023d8f8..1210d22ad547 100644 --- a/arch/x86/include/asm/bug.h +++ b/arch/x86/include/asm/bug.h @@ -37,7 +37,7 @@ do { \ asm volatile("1:\t" ins "\n" \ ".pushsection __bug_table,\"aw\"\n" \ "2:\t" __BUG_REL(1b) "\t# bug_entry::bug_addr\n" \ - "\t" __BUG_REL(%c0) "\t# bug_entry::file\n" \ + "\t" __BUG_REL(%P0) "\t# bug_entry::file\n" \ "\t.word %c1" "\t# bug_entry::line\n" \ "\t.word %c2" "\t# bug_entry::flags\n" \ "\t.org 2b+%c3\n" \