From patchwork Wed Oct 4 21:19:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Garnier X-Patchwork-Id: 9985497 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 EE7D060586 for ; Wed, 4 Oct 2017 21:22:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DE16E28450 for ; Wed, 4 Oct 2017 21:22:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D22D028C2E; Wed, 4 Oct 2017 21:22:14 +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 EB13128450 for ; Wed, 4 Oct 2017 21:22:13 +0000 (UTC) Received: (qmail 14157 invoked by uid 550); 4 Oct 2017 21:21:02 -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 14003 invoked from network); 4 Oct 2017 21:21:01 -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=VT8A0ludnqRGo2P+C1neQMeIRqzEZoAsCQykC2X3Kuk=; b=ZS8bT/Tj4TIVrq7dKUVCsNE//e5hOIRQbIWLd/rKIgHh1L6NSwbh7AialVpCmyXCoO X99lahqPNP7X4dsBb5isRjQvVtOPBRLYL/kc25R/XtHeaEc+hGtEXwLbqJNkzPhq2GSW bQoJllWll9TQjNBKt9QVHBgsZoVOUWMR9g/h52qek4GOM77rPQE2990qbjpWb23S26kB 0vzp/pavEhsrOfVKYUg+NAxXEw8wygjYb8IFT98ml3VpeSqUVxFWBqnzwJtGl9nkx2JA dWmpeYOnvzkjYpxQRofgE5hFR0bmVVIVUVbPtvhvyA2o4WPUsMzQelS4tEGikmwc7NbY W4hw== 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=VT8A0ludnqRGo2P+C1neQMeIRqzEZoAsCQykC2X3Kuk=; b=XduJ+eswnaP8KGQRK5YHvliWwmqzg3cl/qmDQujU/UElCnup3oZgXXsPr0X4BLShxa ZC4yiaTjvq7UO8H5wZNC3QJpR2UFy8N5UEmAtSqQ2CUh7E8nxwlhj5ZVnISgbcDHr+Db atg0qao18m/7TJMH3ZRyMtffuJP68VQOL13kOHoPWVxJewmPkRQw4jr9I77O2djtNdEo 9cJaf4+6j1fBcwwGL4TuFPfCsyDM6wUzqhWRBb3A9KVdhUZSk8AOC/tRQYVvemrqQJF9 yUe4xBEWhHbfYUYzv5VCVt6dCRaEZokt8JFsbByRfUduVd52Msgk+vTsBz5ql6ZSdXdK XlSQ== X-Gm-Message-State: AHPjjUix9ty2xYp921BXVw/TLHXA2y3u0NP8Ak9xzr+zzQ7wa86kcklg iJh8sF/lrjHU2g4AlQkt7AKC0g== X-Google-Smtp-Source: AOwi7QBrYTEWvkd9++uLJc3ryjb8G9AnaSa49tDuXbZ3Ah8Wx22eCG+3z/PEteWmdVhbMEJTUyNmSg== X-Received: by 10.84.254.70 with SMTP id a6mr20684152pln.71.1507152048055; Wed, 04 Oct 2017 14:20:48 -0700 (PDT) From: Thomas Garnier To: Herbert Xu , "David S . Miller" , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Peter Zijlstra , Josh Poimboeuf , Thomas Garnier , Arnd Bergmann , Kees Cook , 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 , Alexey Dobriyan , Andrew Morton , Paul Gortmaker , Chris Metcalf , "Paul E . McKenney" , Nicolas Pitre , Borislav Petkov , "Luis R . Rodriguez" , Greg Kroah-Hartman , Christopher Li , Steven Rostedt , Jason Baron , Dou Liyang , "Rafael J . Wysocki" , Mika Westerberg , 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 , Andrey Ryabinin , Jonathan Corbet , Matthew Wilcox , Michal Hocko , Peter Foley , Paul Bolle , Jiri Kosina , Rob Landley , "H . J . Lu" , 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, 4 Oct 2017 14:19:38 -0700 Message-Id: <20171004212003.28296-3-thgarnie@google.com> X-Mailer: git-send-email 2.14.2.920.gcf0c67979c-goog In-Reply-To: <20171004212003.28296-1-thgarnie@google.com> References: <20171004212003.28296-1-thgarnie@google.com> Subject: [kernel-hardening] [RFC v3 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" \