From owner-freebsd-bugs@FreeBSD.ORG Wed Mar 16 14:50:08 2011 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D377F1065670 for ; Wed, 16 Mar 2011 14:50:08 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 8B4548FC14 for ; Wed, 16 Mar 2011 14:50:08 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p2GEo8cc013348 for ; Wed, 16 Mar 2011 14:50:08 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p2GEo86V013347; Wed, 16 Mar 2011 14:50:08 GMT (envelope-from gnats) Resent-Date: Wed, 16 Mar 2011 14:50:08 GMT Resent-Message-Id: <201103161450.p2GEo86V013347@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Heribert Steuer Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D054F1065670 for ; Wed, 16 Mar 2011 14:43:42 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id BD79C8FC24 for ; Wed, 16 Mar 2011 14:43:42 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p2GEhgwE005383 for ; Wed, 16 Mar 2011 14:43:42 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id p2GEhg3H005370; Wed, 16 Mar 2011 14:43:42 GMT (envelope-from nobody) Message-Id: <201103161443.p2GEhg3H005370@red.freebsd.org> Date: Wed, 16 Mar 2011 14:43:42 GMT From: Heribert Steuer To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: misc/155606: select() does not return EBADF on closed file descriptor X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Mar 2011 14:50:08 -0000 >Number: 155606 >Category: misc >Synopsis: select() does not return EBADF on closed file descriptor >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Mar 16 14:50:08 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Heribert Steuer >Release: 8.1-RELEASE >Organization: >Environment: FreeBSD opusv2p.lr.invalid 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:55:53 UTC 2010 root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >Description: I have tracked down a problem that came up while using the quickfix C++ library on a FreeBSD 8.1 server. We found that the select() system call does not return with a value < 0 and errno set when called on a closed socket. This seems to be related to a threaded environment. Our logs stated, that this happens, whenever a thread context switch occurs between the close() and the select() system calls. If there is no context switch in between, select() returns -1 and errno is set to 9. This is the expected behaviour. The process is reproducable. Unfortunately I cannot provide example code to reproduce this scenario. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted: