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=-8.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 2E3DCC76195 for ; Fri, 19 Jul 2019 22:25:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 067A521873 for ; Fri, 19 Jul 2019 22:25:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563575159; bh=8BWoO3DvmgmHko8VDYdzETwa/D8Uvwa79H4eUTG3YyA=; h=Subject:To:Cc:References:From:Date:In-Reply-To:List-ID:From; b=g9PnETEOopnNohQ/EScjr39nLrkAxbL/tGpzJkamRumv/ee6jXYrEyrxMUy7kXW6M HO3fNzquawTT6M6HpF8jiGHBOsB7Mdu1LQ0KQxEw+J7YfK5hMWqKteOkOTetQMrZRw YZKAu8kX8wLHK8KNI2iaJ3AAnkeUZPIqHOIwQJvA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730217AbfGSWZy (ORCPT ); Fri, 19 Jul 2019 18:25:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:34372 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727344AbfGSWZx (ORCPT ); Fri, 19 Jul 2019 18:25:53 -0400 Received: from [172.20.8.67] (fs96f9c61d.tkyc509.ap.nuro.jp [150.249.198.29]) (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 22F662089C; Fri, 19 Jul 2019 22:25:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563575151; bh=8BWoO3DvmgmHko8VDYdzETwa/D8Uvwa79H4eUTG3YyA=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=2d21roDptAiEMN+/t1Tn1VqLwtXAzfhagrwnPWLFbYgAsIvJrwHrLthScReql/x37 AR35y/eDLcde0w6tvfWPiYxJdZI5Xmb/Wqr3rItqjuiTHCL3Wa/X60g/Pf/v1glDZV /OWIM04HKP6cE2E1wkO2gqhjsIBpm7gFFRxIlREI= Subject: Re: [PATCH v10 8/9] kselftest: save-and-restore errno to allow for %m formatting To: Aleksa Sarai , Al Viro , Jeff Layton , "J. Bruce Fields" , Arnd Bergmann , David Howells , Shuah Khan Cc: Eric Biederman , Andy Lutomirski , Andrew Morton , Alexei Starovoitov , Kees Cook , Jann Horn , Christian Brauner , Tycho Andersen , David Drysdale , Chanho Min , Oleg Nesterov , Aleksa Sarai , Linus Torvalds , containers@lists.linux-foundation.org, linux-alpha@vger.kernel.org, linux-api@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, sparclinux@vger.kernel.org, shuah References: <20190719164225.27083-1-cyphar@cyphar.com> <20190719164225.27083-9-cyphar@cyphar.com> From: shuah Message-ID: Date: Fri, 19 Jul 2019 16:25:46 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20190719164225.27083-9-cyphar@cyphar.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On 7/19/19 10:42 AM, Aleksa Sarai wrote: > Previously, using "%m" in a ksft_* format string can result in strange > output because the errno value wasn't saved before calling other libc > functions. The solution is to simply save and restore the errno before > we format the user-supplied format string. > > Signed-off-by: Aleksa Sarai > --- > tools/testing/selftests/kselftest.h | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h > index ec15c4f6af55..0ac49d91a260 100644 > --- a/tools/testing/selftests/kselftest.h > +++ b/tools/testing/selftests/kselftest.h > @@ -10,6 +10,7 @@ > #ifndef __KSELFTEST_H > #define __KSELFTEST_H > > +#include > #include > #include > #include > @@ -81,58 +82,68 @@ static inline void ksft_print_cnts(void) > > static inline void ksft_print_msg(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > va_start(args, msg); > printf("# "); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_pass(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_pass++; > > va_start(args, msg); > printf("ok %d ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_fail(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_fail++; > > va_start(args, msg); > printf("not ok %d ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_skip(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_xskip++; > > va_start(args, msg); > printf("not ok %d # SKIP ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > > static inline void ksft_test_result_error(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > ksft_cnt.ksft_error++; > > va_start(args, msg); > printf("not ok %d # error ", ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } > @@ -152,10 +163,12 @@ static inline int ksft_exit_fail(void) > > static inline int ksft_exit_fail_msg(const char *msg, ...) > { > + int saved_errno = errno; > va_list args; > > va_start(args, msg); > printf("Bail out! "); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > > @@ -178,10 +191,12 @@ static inline int ksft_exit_xpass(void) > static inline int ksft_exit_skip(const char *msg, ...) > { > if (msg) { > + int saved_errno = errno; > va_list args; > > va_start(args, msg); > printf("not ok %d # SKIP ", 1 + ksft_test_num()); > + errno = saved_errno; > vprintf(msg, args); > va_end(args); > } else { > Hi Aleksa, Can you send this patch separate from the patch series. I will apply this as bug fix to 5.3-rc2 or rc3. This isn't part of this series anyway and I would like to get this in right away. thanks, -- Shuah