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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 16E0FC18E5A for ; Tue, 10 Mar 2020 20:31:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A371F21927 for ; Tue, 10 Mar 2020 20:31:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="XK1ouSvI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A371F21927 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 551C46B0003; Tue, 10 Mar 2020 16:31:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 501086B0006; Tue, 10 Mar 2020 16:31:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3A3F66B0008; Tue, 10 Mar 2020 16:31:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0078.hostedemail.com [216.40.44.78]) by kanga.kvack.org (Postfix) with ESMTP id 1EDBE6B0003 for ; Tue, 10 Mar 2020 16:31:21 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id DB4D48248047 for ; Tue, 10 Mar 2020 20:31:20 +0000 (UTC) X-FDA: 76580597520.17.dogs37_28d1a883a4458 X-HE-Tag: dogs37_28d1a883a4458 X-Filterd-Recvd-Size: 5961 Received: from mail-pf1-f196.google.com (mail-pf1-f196.google.com [209.85.210.196]) by imf08.hostedemail.com (Postfix) with ESMTP for ; Tue, 10 Mar 2020 20:31:20 +0000 (UTC) Received: by mail-pf1-f196.google.com with SMTP id b72so3472045pfb.11 for ; Tue, 10 Mar 2020 13:31:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=SXv613ohwLZhXYr9jit6ve5UEm0jQz5ZLBUY3A1Qh/4=; b=XK1ouSvIn1SrXrpE2jB7fPZ97wuSynEPpj4HhSXMNSXZWl5ShAjfCYXT5irwpY6R5K GhTb4r+GBtdXtwQ7AqZpQT4zG1MOZvavI8l7jKs0+HzwzxDheOxB6TKArYWjMCD7s5Ob TsIYA2DD/9E+2ADf9dPVRUDESK4sdz6wOBd0k= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=SXv613ohwLZhXYr9jit6ve5UEm0jQz5ZLBUY3A1Qh/4=; b=HSKr4Kl45I4FUXa56VwSA2zzeZ30Sz3V6qpHsSnBpLR2yvzrH/RmNKASYTcwQN1g32 UYjFj6DAG4r660IulcJGOxX5wPEp6C9AYENrp/C3d6u0GJPKPKZrRiD0XmHJpCAzPpJa q0B2cNMTbhfi2bU07BretBbrme9wz+xPbS3UUl1oolwYq7P885VDLpumcHYwqKFUzac3 oARrbQObwsLO5WnEuyC0R0eYgzcjZiZ9ZcoU/ER+wsWlXwUHVADq1ITRpnaSMFFiyMh6 DBmVS/1YM+7qFzD0scgaIkgsoT5WauioCOScWyE11j0Jnj3rs/5ZgCzNX5Ay0LvbMuMI uTvQ== X-Gm-Message-State: ANhLgQ217vGDmE88ZQ3qteY1m8iXvsiAWW5k54zhMzWkyw88Xlh1idcy y5+mlYHVeJAxMnJDjdqUt1g38Q== X-Google-Smtp-Source: ADFU+vui/SI7xY/RL6zB2m7oqlqxvwNncXDyzP64Ny/XUIARUXO4zMninrFbDKhmtcjQIv0QBej9OQ== X-Received: by 2002:a63:fc18:: with SMTP id j24mr21853810pgi.16.1583872279279; Tue, 10 Mar 2020 13:31:19 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id d3sm2205705pfq.126.2020.03.10.13.31.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2020 13:31:18 -0700 (PDT) Date: Tue, 10 Mar 2020 13:31:17 -0700 From: Kees Cook To: "Eric W. Biederman" Cc: Bernd Edlinger , Christian Brauner , Jann Horn , Jonathan Corbet , Alexander Viro , Andrew Morton , Alexey Dobriyan , Thomas Gleixner , Oleg Nesterov , Frederic Weisbecker , Andrei Vagin , Ingo Molnar , "Peter Zijlstra (Intel)" , Yuyang Du , David Hildenbrand , Sebastian Andrzej Siewior , Anshuman Khandual , David Howells , James Morris , Greg Kroah-Hartman , Shakeel Butt , Jason Gunthorpe , Christian Kellner , Andrea Arcangeli , Aleksa Sarai , "Dmitry V. Levin" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" , "stable@vger.kernel.org" , "linux-api@vger.kernel.org" Subject: Re: [PATCH v2 3/5] exec: Move cleanup of posix timers on exec out of de_thread Message-ID: <202003101329.08B332F@keescook> References: <87v9nlii0b.fsf@x220.int.ebiederm.org> <87a74xi4kz.fsf@x220.int.ebiederm.org> <87r1y8dqqz.fsf@x220.int.ebiederm.org> <87tv32cxmf.fsf_-_@x220.int.ebiederm.org> <87v9ne5y4y.fsf_-_@x220.int.ebiederm.org> <87eeu25y14.fsf_-_@x220.int.ebiederm.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87eeu25y14.fsf_-_@x220.int.ebiederm.org> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, Mar 08, 2020 at 04:36:55PM -0500, Eric W. Biederman wrote: > > These functions have very little to do with de_thread move them out > of de_thread an into flush_old_exec proper so it can be more clearly > seen what flush_old_exec is doing. > > Signed-off-by: "Eric W. Biederman" > --- > fs/exec.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/fs/exec.c b/fs/exec.c > index ff74b9a74d34..215d86f77b63 100644 > --- a/fs/exec.c > +++ b/fs/exec.c > @@ -1189,11 +1189,6 @@ static int de_thread(struct task_struct *tsk) > /* we have changed execution domain */ > tsk->exit_signal = SIGCHLD; > > -#ifdef CONFIG_POSIX_TIMERS > - exit_itimers(sig); > - flush_itimer_signals(); > -#endif > - > BUG_ON(!thread_group_leader(tsk)); > return 0; > > @@ -1277,6 +1272,11 @@ int flush_old_exec(struct linux_binprm * bprm) > if (retval) > goto out; > > +#ifdef CONFIG_POSIX_TIMERS > + exit_itimers(me->signal); > + flush_itimer_signals(); > +#endif > + I twitch at seeing #ifdefs in .c instead of hidden in the .h declarations of these two functions, but as this is a copy/paste, I'll live. ;) Reviewed-by: Kees Cook -Kees > /* > * Make the signal table private. > */ > -- > 2.25.0 > -- Kees Cook