From owner-freebsd-bugs@FreeBSD.ORG Fri Apr 6 21:10:01 2012 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 B5352106566C for ; Fri, 6 Apr 2012 21:10:01 +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 6E8E18FC0C for ; Fri, 6 Apr 2012 21:10:01 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q36LA1YZ079632 for ; Fri, 6 Apr 2012 21:10:01 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q36LA1Uf079631; Fri, 6 Apr 2012 21:10:01 GMT (envelope-from gnats) Resent-Date: Fri, 6 Apr 2012 21:10:01 GMT Resent-Message-Id: <201204062110.q36LA1Uf079631@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, Ion Gaztaņaga Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 225C81065672 for ; Fri, 6 Apr 2012 21:06:43 +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 0CB7F8FC0C for ; Fri, 6 Apr 2012 21:06:43 +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 q36L6g0O067778 for ; Fri, 6 Apr 2012 21:06:42 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id q36L6gDC067777; Fri, 6 Apr 2012 21:06:42 GMT (envelope-from nobody) Message-Id: <201204062106.q36L6gDC067777@red.freebsd.org> Date: Fri, 6 Apr 2012 21:06:42 GMT From: Ion Gaztaņaga To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/166706: sem_open incorrectly returns the already opened named semaphore handle when O_EXCL is used 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: Fri, 06 Apr 2012 21:10:01 -0000 >Number: 166706 >Category: kern >Synopsis: sem_open incorrectly returns the already opened named semaphore handle when O_EXCL is used >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Apr 06 21:10:01 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Ion Gaztaņaga >Release: 9.0 RELEASE >Organization: >Environment: FreeBSD pcbsd-5366 9.0 RELEASE FreeBSD 9.0 RELEASE (...) PCBSD amd64 >Description: POSIX states that if O_EXCL and O_CREAT are set, sem_open() fails if the semaphore name exists, even if the semaphore was already opened by the current process. The following test case shows the problem: #include #include #include #include #include #include int main() { sem_t *sem1, *sem2; sem_unlink("/testsem"); sem1 = sem_open("/testsem", O_CREAT|O_EXCL, 0644, 1); if(sem1 == SEM_FAILED){ return 1; } sem2 = sem_open("/testsem", O_CREAT|O_EXCL, 0644, 1); if(sem2 != SEM_FAILED){ printf("ERROR: semaphore already created O_EXCL should fail\n"); sem_close(sem2); sem_unlink("/testsem"); return 1; } printf("OK: semaphore already created, O_EXCL has failed\n"); sem_close(sem1); sem_unlink("/testsem"); return 0; } In FreeBSD 9 the test fails, whereas in FreeBSD 8 (FreeBSD pcbsd-4080 8.0-RELEASE-p2 FreeBSD 8.0-RELEASE-p2 (...) PCBSD i386) the test passes. >How-To-Repeat: Run the test case >Fix: >Release-Note: >Audit-Trail: >Unformatted: