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=-14.5 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham 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 58E82C07E95 for ; Sat, 10 Jul 2021 18:16:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3A9726135D for ; Sat, 10 Jul 2021 18:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229703AbhGJSSp (ORCPT ); Sat, 10 Jul 2021 14:18:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229674AbhGJSSp (ORCPT ); Sat, 10 Jul 2021 14:18:45 -0400 Received: from mail-wr1-x42b.google.com (mail-wr1-x42b.google.com [IPv6:2a00:1450:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A370C0613DD for ; Sat, 10 Jul 2021 11:15:59 -0700 (PDT) Received: by mail-wr1-x42b.google.com with SMTP id p8so17350504wrr.1 for ; Sat, 10 Jul 2021 11:15:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=q/JS6qm0BNtVg9JndociL53She6u8NxV5hTNwwt3bgw=; b=kqKch/rgb2DDzqd7D4sjfb1ZwiddDIWbdaZCz+pFLagUXIeHlkKAiqm+y8ve2gQ+sJ tGQIT5eq0Hy+bbILINtBBbtJ+PoaNfbzdH64wHNI4TuwuK20nxepo7BPI2xYHZBcJ56Q 9s/5+TcYBAXAVRGT703Sd3V6yCJLJrHmzP+t66KhrtXSclNRIbguqjLJuAJdHf30kMoB NzFjp1dMTLEnhKeNPwxYJAZ0xVMwolc1wpIRcwT0pl6mKb03LEk8DwU0nk586fzYRlaC lzt6FSWI3RVnqqQ+SklTwm5EkViUuaO7bL9TIcIhx+IHvOVTL8ptJXOVeLFroGm7r/aH Tt7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=q/JS6qm0BNtVg9JndociL53She6u8NxV5hTNwwt3bgw=; b=tDNF2I0xyYx2OFmR9fmOkyYeJNuiFsBopAslLOY2YrhgeqAMz7vRnD08JlYgX3RMqI 2XHvGjrmm9s9OIxzvI9aWO3bWGR7ccOD6jiCIfCP1LuzZFIvKNHxUPkLLdbq8wcGmm2I hPqHwbCJlxCod6dJtAszzXX8KASCA92Zgtiz4xmEUT2L0FDoyZHdInfWT5He91RAcV8c urKY0zpIIDmipRHjQ0C+bOtKEkSP3nH/bg7gyjXzhssWTpkQLojMcZSgrlwqOsDGMVWf JqOOr1UC8uppcyG9AkZkLXFiTwv0RFGDJ8o0UzSVTSz77jb1YKFOKFuacuYfddm4fjVE gEfA== X-Gm-Message-State: AOAM530rV3/CGmw7FM1gMDmzKc6QRuHSgtjFZu7Z763qD14SuNF+weQ3 x4ZyYAhXZrWs3xJBVuryZ3qWDczwnoU= X-Google-Smtp-Source: ABdhPJwO3EiZJK8VMprND1Bly+Rbt+oC6ePu23blaTcW3Q85pYOuVQZBd+98R3iebnkqeguUuGIpaQ== X-Received: by 2002:a5d:4fd2:: with SMTP id h18mr24288788wrw.289.1625940957884; Sat, 10 Jul 2021 11:15:57 -0700 (PDT) Received: from [192.168.0.160] ([170.253.36.171]) by smtp.gmail.com with ESMTPSA id o14sm3134163wrj.66.2021.07.10.11.15.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 10 Jul 2021 11:15:57 -0700 (PDT) Subject: Re: [PATCH] wait.2: Add ESRCH for when pid == INT_MIN To: Richard Palethorpe Cc: Michael Kerrisk , linux-man@vger.kernel.org References: <20210708100853.17391-1-rpalethorpe@suse.com> From: "Alejandro Colomar (man-pages)" Message-ID: <4bc36021-8d93-6af6-07ec-c388fcd2e4d1@gmail.com> Date: Sat, 10 Jul 2021 20:15:56 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <20210708100853.17391-1-rpalethorpe@suse.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Hello Richard, On 7/8/21 12:08 PM, Richard Palethorpe wrote: > Please see upstream commit: > > commit dd83c161fbcc5d8be637ab159c0de015cbff5ba4 > Author: zhongjiang > Date: Mon Jul 10 15:53:01 2017 -0700 > > kernel/exit.c: avoid undefined behaviour when calling wait4() > > It avoids negating INT_MIN by returning early with ESRCH. > > Signed-off-by: Richard Palethorpe Patch applied. Thanks, Alex > --- > man2/wait.2 | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/man2/wait.2 b/man2/wait.2 > index 5ae955b3f..63d872ee6 100644 > --- a/man2/wait.2 > +++ b/man2/wait.2 > @@ -455,6 +455,15 @@ was caught; see > The > .I options > argument was invalid. > +.TP > +.B ESRCH > +(for > +.BR wait () > +or > +.BR waitpid ()) > +.I pid > +is equal to > +.I INT_MIN > .SH CONFORMING TO > SVr4, 4.3BSD, POSIX.1-2001. > .SH NOTES > -- Alejandro Colomar Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/ http://www.alejandro-colomar.es/