Received: by 2002:a05:6a10:a841:0:0:0:0 with SMTP id d1csp1432374pxy; Thu, 29 Apr 2021 07:04:25 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyLmU0W8J42OlzoMWaaYVcAY00TP4/58wMNP5PeNmP/S+kbtd8AC8ctUUrNjCUWUiHgtyvK X-Received: by 2002:a2e:330f:: with SMTP id d15mr24252679ljc.251.1619705065588; Thu, 29 Apr 2021 07:04:25 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1619705065; cv=none; d=google.com; s=arc-20160816; b=TtcPywDoq/R69AzsRuovjEFHN7bx5fgiW0qxP1M+zWJI/nwWsn7bTGBcPjjbpEoLKb gviVlarjwfpUZwhTYK8BzEYc33Ja49RzQY0VE9ZTbrzaj+6UfU+qSltv+tW3uPWV3TKx AQbI74Hsz8PtChvTlaWAeqmNG2ioE5jIn+9mCmeXUL78aXAYAe9zWT1/27oB1CRzSvO+ GH72tUZ+3PGnwke4yYuDGBYCNZ2D8tZgb3w1OfHfXMB4W023g/NwkNVI6GBU3cxuPv7J Pgwrjgf8gcKTtIyeYBNITjRgQnqhs9XXMqn4m/F9iIto/3dOd3IyDF5a5wxxonH32dbe uq/A== 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=eJDY0j5znNL39CJSybjDWNNsPdXLoM61o2VzJbnS3Eo=; b=QmrkXNP+QhONbFKrRxQkOxunuVQpr2B+qK0s8ZKcFD2t1emtzJ8xu7s8OFlvy/aA+Q xdorBwUjxHrtTVQHCf7j7fDidZCIIbWvD4LDa8lY57Wbz5vwTGQvxHqL2BMjk/9lTBBc AnBkKv1WPQ+TzqRMrlmhnIci8Eduh4S9K/fCdOpbMAypHGvT7a4K2G4e7EkBJoA2ogg1 PSLthG8Tw1ZTRrpgemkiIWzVLk6lvTEvaJSiQx1L+El/pxDAY9k7MMt3RFJRzDLABZJf iF2E0eACtQelTaTk7YrlyShiejOB+U3rS3ueO8B7iHEGEik+VkBU12jEP7xEFUnUSAHR u+2w== 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 bt5si94170ejb.50.2021.04.29.07.04.01; Thu, 29 Apr 2021 07:04:25 -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 S239514AbhD2ODS (ORCPT + 99 others); Thu, 29 Apr 2021 10:03:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238957AbhD2ODP (ORCPT ); Thu, 29 Apr 2021 10:03:15 -0400 Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B2EFC06138B for ; Thu, 29 Apr 2021 07:02:28 -0700 (PDT) Received: by ozlabs.org (Postfix, from userid 1034) id 4FWHJ14Ptvz9sjD; Fri, 30 Apr 2021 00:02:25 +1000 (AEST) From: Michael Ellerman To: Michael Ellerman , Benjamin Herrenschmidt , Christophe Leroy , Paul Mackerras Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org In-Reply-To: References: Subject: Re: [PATCH] powerpc/signal32: Fix erroneous SIGSEGV on RT signal return Message-Id: <161970488799.4033873.13546091065982026265.b4-ty@ellerman.id.au> Date: Fri, 30 Apr 2021 00:01:27 +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 Fri, 23 Apr 2021 13:52:10 +0000 (UTC), Christophe Leroy wrote: > Return of user_read_access_begin() is tested the wrong way, > leading to a SIGSEGV when the user address is valid and likely > an Oops when the user address is bad. > > Fix the test. Applied to powerpc/next. [1/1] powerpc/signal32: Fix erroneous SIGSEGV on RT signal return https://git.kernel.org/powerpc/c/5256426247837feb8703625bda7fcfc824af04cf cheers