From owner-svn-src-all@freebsd.org Wed Jan 13 12:01:30 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 43449A80BA4; Wed, 13 Jan 2016 12:01:30 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 110631784; Wed, 13 Jan 2016 12:01:29 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u0DC1T48042144; Wed, 13 Jan 2016 12:01:29 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u0DC1T9Q042143; Wed, 13 Jan 2016 12:01:29 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201601131201.u0DC1T9Q042143@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Wed, 13 Jan 2016 12:01:29 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r293825 - head/sys/dev/pty X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Jan 2016 12:01:30 -0000 Author: kib Date: Wed Jan 13 12:01:28 2016 New Revision: 293825 URL: https://svnweb.freebsd.org/changeset/base/293825 Log: Switch legacy pty clone handler to use make_dev_s(9). Add MAKEDEV_CHECKNAME flag to the call, this is required to not panic on race between the clone and destructing the closed master. Reported by and discussed with: bde Tested by: pho (as part of the larger patch) Sponsored by: The FreeBSD Foundation MFC after: 3 weeks Modified: head/sys/dev/pty/pty.c Modified: head/sys/dev/pty/pty.c ============================================================================== --- head/sys/dev/pty/pty.c Wed Jan 13 09:26:44 2016 (r293824) +++ head/sys/dev/pty/pty.c Wed Jan 13 12:01:28 2016 (r293825) @@ -97,6 +97,8 @@ static void pty_clone(void *arg, struct ucred *cr, char *name, int namelen, struct cdev **dev) { + struct make_dev_args mda; + int error; /* Cloning is already satisfied. */ if (*dev != NULL) @@ -117,8 +119,17 @@ pty_clone(void *arg, struct ucred *cr, c return; /* Create the controller device node. */ - *dev = make_dev_credf(MAKEDEV_REF, &ptydev_cdevsw, 0, - NULL, UID_ROOT, GID_WHEEL, 0666, "%s", name); + make_dev_args_init(&mda); + mda.mda_flags = MAKEDEV_CHECKNAME | MAKEDEV_REF; + mda.mda_devsw = &ptydev_cdevsw; + mda.mda_uid = UID_ROOT; + mda.mda_gid = GID_WHEEL; + mda.mda_mode = 0666; + error = make_dev_s(&mda, dev, "%s", name); + if (error != 0) { + printf("pty_clone: failed to create %s: %d\n", name, error); + *dev = NULL; + } } static int