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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 BB5CEC433E0 for ; Wed, 10 Jun 2020 11:21:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 875EC2074B for ; Wed, 10 Jun 2020 11:21:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591788076; bh=Vy1uNGpCyh3WA6USKC361S2rQ3bIgdUucbjMN7/azjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Up4tYKEt5kxMXfxefQT4EUo6IjnVOqRM4c76ebSMZuQJ404vxE9RgJciYD0ZlCvb4 F+/L5K0O1RmBBqW8ix6CaP71L8wF98fCgEnHBY6/Bk3YyoU+5k03wz5QYL2SKazeGz jIj4pXQF+z6DwUvLV03z9KucZUtRS7El+a+YKa0A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728452AbgFJLVP (ORCPT ); Wed, 10 Jun 2020 07:21:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:39226 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728381AbgFJLVP (ORCPT ); Wed, 10 Jun 2020 07:21:15 -0400 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 90C21204EA; Wed, 10 Jun 2020 11:21:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591788074; bh=Vy1uNGpCyh3WA6USKC361S2rQ3bIgdUucbjMN7/azjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XB3sMSmPStKwcCZbiYtdbjcc80l0y5WR7y4apK8+o9JokOR6gHgKEQwDzHFPMA85c FoCa4mEEx9ZMZAoRsv+zHWXuDbAvF/9mmVN4hLO1ZrO/iqgDUErh9zdAoFUs3ez8g3 nU3W3qhCqAntUiYzsYf4mHoYpPfCt5U6DER3f7lQ= From: Will Deacon To: Nick Desaulniers , Catalin Marinas Cc: Will Deacon , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Thomas Gleixner , Enrico Weigelt , Ard Biesheuvel , Allison Randal , Lorenzo Pieralisi , Jeremy Linton , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2] arm64: acpi: fix UBSAN warning Date: Wed, 10 Jun 2020 12:21:08 +0100 Message-Id: <159178566875.41592.7975510364023488303.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200608203818.189423-1-ndesaulniers@google.com> References: <20200608203818.189423-1-ndesaulniers@google.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 8 Jun 2020 13:38:17 -0700, Nick Desaulniers wrote: > Will reported a UBSAN warning: > > UBSAN: null-ptr-deref in arch/arm64/kernel/smp.c:596:6 > member access within null pointer of type 'struct acpi_madt_generic_interrupt' > CPU: 0 PID: 0 Comm: swapper Not tainted 5.7.0-rc6-00124-g96bc42ff0a82 #1 > Call trace: > dump_backtrace+0x0/0x384 > show_stack+0x28/0x38 > dump_stack+0xec/0x174 > handle_null_ptr_deref+0x134/0x174 > __ubsan_handle_type_mismatch_v1+0x84/0xa4 > acpi_parse_gic_cpu_interface+0x60/0xe8 > acpi_parse_entries_array+0x288/0x498 > acpi_table_parse_entries_array+0x178/0x1b4 > acpi_table_parse_madt+0xa4/0x110 > acpi_parse_and_init_cpus+0x38/0x100 > smp_init_cpus+0x74/0x258 > setup_arch+0x350/0x3ec > start_kernel+0x98/0x6f4 > > [...] Applied to arm64 (for-next/core), thanks! [1/1] arm64: acpi: fix UBSAN warning https://git.kernel.org/arm64/c/a194c33f45f8 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev