From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oleg Nesterov Subject: Re: [PATCH v2 1/2] open: add close_range() Date: Thu, 23 May 2019 18:20:05 +0200 Message-ID: <20190523162004.GC23070@redhat.com> References: <20190523154747.15162-1-christian@brauner.io> <20190523154747.15162-2-christian@brauner.io> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20190523154747.15162-2-christian@brauner.io> Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Christian Brauner Cc: viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, torvalds@linux-foundation.org, fweimer@redhat.com, jannh@google.com, tglx@linutronix.de, arnd@arndb.de, shuah@kernel.org, dhowells@redhat.com, tkjos@android.com, ldv@altlinux.org, miklos@szeredi.hu, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@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, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, x86@kernel.org On 05/23, Christian Brauner wrote: > > +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) > +{ > + unsigned int cur_max; > + > + if (fd > max_fd) > + return -EINVAL; > + > + rcu_read_lock(); > + cur_max = files_fdtable(files)->max_fds; > + rcu_read_unlock(); > + > + /* cap to last valid index into fdtable */ > + max_fd = max(max_fd, (cur_max - 1)); ^^^ Hmm. min() ? Oleg. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oleg Nesterov Date: Thu, 23 May 2019 16:20:05 +0000 Subject: Re: [PATCH v2 1/2] open: add close_range() Message-Id: <20190523162004.GC23070@redhat.com> List-Id: References: <20190523154747.15162-1-christian@brauner.io> <20190523154747.15162-2-christian@brauner.io> In-Reply-To: <20190523154747.15162-2-christian@brauner.io> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Christian Brauner Cc: viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org, torvalds@linux-foundation.org, fweimer@redhat.com, jannh@google.com, tglx@linutronix.de, arnd@arndb.de, shuah@kernel.org, dhowells@redhat.com, tkjos@android.com, ldv@altlinux.org, miklos@szeredi.hu, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@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, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, x86@kernel.org On 05/23, Christian Brauner wrote: > > +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) > +{ > + unsigned int cur_max; > + > + if (fd > max_fd) > + return -EINVAL; > + > + rcu_read_lock(); > + cur_max = files_fdtable(files)->max_fds; > + rcu_read_unlock(); > + > + /* cap to last valid index into fdtable */ > + max_fd = max(max_fd, (cur_max - 1)); ^^^ Hmm. min() ? Oleg. From mboxrd@z Thu Jan 1 00:00:00 1970 From: oleg at redhat.com (Oleg Nesterov) Date: Thu, 23 May 2019 18:20:05 +0200 Subject: [PATCH v2 1/2] open: add close_range() In-Reply-To: <20190523154747.15162-2-christian@brauner.io> References: <20190523154747.15162-1-christian@brauner.io> <20190523154747.15162-2-christian@brauner.io> Message-ID: <20190523162004.GC23070@redhat.com> On 05/23, Christian Brauner wrote: > > +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) > +{ > + unsigned int cur_max; > + > + if (fd > max_fd) > + return -EINVAL; > + > + rcu_read_lock(); > + cur_max = files_fdtable(files)->max_fds; > + rcu_read_unlock(); > + > + /* cap to last valid index into fdtable */ > + max_fd = max(max_fd, (cur_max - 1)); ^^^ Hmm. min() ? Oleg. From mboxrd@z Thu Jan 1 00:00:00 1970 From: oleg@redhat.com (Oleg Nesterov) Date: Thu, 23 May 2019 18:20:05 +0200 Subject: [PATCH v2 1/2] open: add close_range() In-Reply-To: <20190523154747.15162-2-christian@brauner.io> References: <20190523154747.15162-1-christian@brauner.io> <20190523154747.15162-2-christian@brauner.io> Message-ID: <20190523162004.GC23070@redhat.com> Content-Type: text/plain; charset="UTF-8" Message-ID: <20190523162005.Li9TfqHgEilAq34Z07l2vtlmMH9q9C8ERE6tzbCZt7w@z> On 05/23, Christian Brauner wrote: > > +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) > +{ > + unsigned int cur_max; > + > + if (fd > max_fd) > + return -EINVAL; > + > + rcu_read_lock(); > + cur_max = files_fdtable(files)->max_fds; > + rcu_read_unlock(); > + > + /* cap to last valid index into fdtable */ > + max_fd = max(max_fd, (cur_max - 1)); ^^^ Hmm. min() ? Oleg. 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=0.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, USER_AGENT_MUTT 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 926EAC282DD for ; Thu, 23 May 2019 16:23:11 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E023320644 for ; Thu, 23 May 2019 16:23:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E023320644 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 458vth2sZGzDqXS for ; Fri, 24 May 2019 02:23:08 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=redhat.com (client-ip=209.132.183.28; helo=mx1.redhat.com; envelope-from=oleg@redhat.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 458vr30l00zDqWb for ; Fri, 24 May 2019 02:20:51 +1000 (AEST) Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 408BA6698C; Thu, 23 May 2019 16:20:18 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.43.17.159]) by smtp.corp.redhat.com (Postfix) with SMTP id 9C59759441; Thu, 23 May 2019 16:20:08 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Thu, 23 May 2019 18:20:15 +0200 (CEST) Date: Thu, 23 May 2019 18:20:05 +0200 From: Oleg Nesterov To: Christian Brauner Subject: Re: [PATCH v2 1/2] open: add close_range() Message-ID: <20190523162004.GC23070@redhat.com> References: <20190523154747.15162-1-christian@brauner.io> <20190523154747.15162-2-christian@brauner.io> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190523154747.15162-2-christian@brauner.io> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Thu, 23 May 2019 16:20:41 +0000 (UTC) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, ldv@altlinux.org, dhowells@redhat.com, linux-kselftest@vger.kernel.org, sparclinux@vger.kernel.org, shuah@kernel.org, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, miklos@szeredi.hu, x86@kernel.org, torvalds@linux-foundation.org, linux-mips@vger.kernel.org, linux-xtensa@linux-xtensa.org, tkjos@android.com, arnd@arndb.de, jannh@google.com, linux-m68k@lists.linux-m68k.org, viro@zeniv.linux.org.uk, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, fweimer@redhat.com, linux-parisc@vger.kernel.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 05/23, Christian Brauner wrote: > > +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) > +{ > + unsigned int cur_max; > + > + if (fd > max_fd) > + return -EINVAL; > + > + rcu_read_lock(); > + cur_max = files_fdtable(files)->max_fds; > + rcu_read_unlock(); > + > + /* cap to last valid index into fdtable */ > + max_fd = max(max_fd, (cur_max - 1)); ^^^ Hmm. min() ? Oleg. 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 05/23, Christian Brauner wrote: > > +int __close_range(struct files_struct *files, unsigned fd, unsigned max_fd) > +{ > + unsigned int cur_max; > + > + if (fd > max_fd) > + return -EINVAL; > + > + rcu_read_lock(); > + cur_max = files_fdtable(files)->max_fds; > + rcu_read_unlock(); > + > + /* cap to last valid index into fdtable */ > + max_fd = max(max_fd, (cur_max - 1)); ^^^ Hmm. min() ? Oleg. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel