Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp1739495pxj; Sun, 16 May 2021 02:39:20 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx7VNliXZaMhMy+nScVAR87lM+c2Ka0Mek4aY8Ugio8bkONfGt5KM9jMl/iaHX9poplE1Wg X-Received: by 2002:a92:340a:: with SMTP id b10mr48107232ila.301.1621157960136; Sun, 16 May 2021 02:39:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1621157960; cv=none; d=google.com; s=arc-20160816; b=ZywONUImJNMqo9i3OXlabu89fBNZY3RgvcgWA/wy/iVvDBjvm4bV/AekObZQ+yJKHP nlWqxcK+yj/NXDQ2kcSEh4W/qSYSvaowBFXQoJQ0/JSnFuLQjhztOBDlXlJnAKzwhJvC 9ptxl5FeUNoh9wQ2P0xxKmdFSEPytKvTMH0WeLExu/ZDKRunamuMm1c5K03SPkftP+Vv aAlT/35SIisikGa/RE+CJuh/oTbf4x5QVsIvDwVvD/9pSdgLqO9uWmKX9rtjZ0zPjoch l4Qc7zjHlmGyoxWWTyywYC4yQOkkRQ8Wjq7LpoD8A3G3NvlPYqLr5yvrwyHt7hP42ofG 16WQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version:date :message-id:subject:references:in-reply-to:cc:to:from; bh=WFjESORPDiowJpAup5Ey9TvEXICyrzET7yZ6EdhjZg8=; b=pe7Nu6R0WdVPsrfHkytZnCqwlVICmj2HrQ4Hs7MP4oLivHn26tbIYRm/QsEkrGE78X Dwsy/uu/EiP4RCQYZDnXhca22fVy+6BRI+1VmMWQciGzojUCEaA985cVqGSEw7WkyzAO HUCp8KqN6oqG41MOojmRtKN91EkRFGEVRLTJQ1mA3BwCOYxugDl+s+LRqoGwdedkzkZR Y09UdnCn9+Qr0oo7icVg4Adp3FbvbXL2mSUyT+KWelk+5FGqf/FD7VEzeY29HCNY77IL CHJS+5hyh4uTm6QLshID9KwAHtU0kR15mH68+ZKOq6YKvKocNNatwXhUYyK2BxsOagxp JCyg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id i14si14067235ilv.131.2021.05.16.02.39.06; Sun, 16 May 2021 02:39:20 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230332AbhEOWrG (ORCPT + 99 others); Sat, 15 May 2021 18:47:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229976AbhEOWq7 (ORCPT ); Sat, 15 May 2021 18:46:59 -0400 Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4D57C06174A for ; Sat, 15 May 2021 15:45:45 -0700 (PDT) Received: by ozlabs.org (Postfix, from userid 1034) id 4FjL8P3l5fz9sX1; Sun, 16 May 2021 08:45:41 +1000 (AEST) From: Michael Ellerman To: pmenzel@molgen.mpg.de, Benjamin Herrenschmidt , Christophe Leroy , Paul Mackerras , Michael Ellerman Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org In-Reply-To: References: Subject: Re: [PATCH] powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds Message-Id: <162111863369.1890426.15615918327643788763.b4-ty@ellerman.id.au> Date: Sun, 16 May 2021 08:43:53 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 8 May 2021 06:36:21 +0000 (UTC), Christophe Leroy wrote: > UBSAN complains when a pointer is calculated with invalid > 'legacy_serial_console' index, allthough the index is verified > before dereferencing the pointer. > > Fix it by checking 'legacy_serial_console' validity before > calculating pointers. Applied to powerpc/fixes. [1/1] powerpc/legacy_serial: Fix UBSAN: array-index-out-of-bounds https://git.kernel.org/powerpc/c/63970f3c37e75997ed86dbdfdc83df35f2152bb1 cheers