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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 A9A47C10F27 for ; Mon, 9 Mar 2020 19:59:54 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7EA4D20866 for ; Mon, 9 Mar 2020 19:59:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7EA4D20866 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ubuntu.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 29BFF6B0005; Mon, 9 Mar 2020 15:59:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 24BEF6B0006; Mon, 9 Mar 2020 15:59:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 13B4E6B0007; Mon, 9 Mar 2020 15:59:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0201.hostedemail.com [216.40.44.201]) by kanga.kvack.org (Postfix) with ESMTP id F0C146B0005 for ; Mon, 9 Mar 2020 15:59:53 -0400 (EDT) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id C06FC8249980 for ; Mon, 9 Mar 2020 19:59:53 +0000 (UTC) X-FDA: 76576889466.09.scene37_908d12c98a825 X-HE-Tag: scene37_908d12c98a825 X-Filterd-Recvd-Size: 4705 Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by imf41.hostedemail.com (Postfix) with ESMTP for ; Mon, 9 Mar 2020 19:59:53 +0000 (UTC) Received: from ip5f5bf7ec.dynamic.kabel-deutschland.de ([95.91.247.236] helo=wittgenstein) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1jBOYR-0002mB-Lc; Mon, 09 Mar 2020 19:59:11 +0000 Date: Mon, 9 Mar 2020 20:59:09 +0100 From: Christian Brauner To: "Eric W. Biederman" Cc: Bernd Edlinger , Kees Cook , 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: <20200309195909.h2lv5uawce5wgryx@wittgenstein> 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=utf-8 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) While you're cleaning up de_thread() wouldn't it be good to also take the opportunity and remove the task argument from de_thread(). It's only ever used with current. Could be done in one of your patches or as a separate patch. diff --git a/fs/exec.c b/fs/exec.c index db17be51b112..ee108707e4b0 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1061,8 +1061,9 @@ static int exec_mmap(struct mm_struct *mm) * disturbing other processes. (Other processes might share the signal * table via the CLONE_SIGHAND option to clone().) */ -static int de_thread(struct task_struct *tsk) +static int de_thread(void) { + struct task_struct *tsk = current; struct signal_struct *sig = tsk->signal; struct sighand_struct *oldsighand = tsk->sighand; spinlock_t *lock = &oldsighand->siglock; @@ -1266,7 +1267,7 @@ int flush_old_exec(struct linux_binprm * bprm) * Make sure we have a private signal table and that * we are unassociated from the previous thread group. */ - retval = de_thread(current); + retval = de_thread(); if (retval) goto out;