From owner-svn-src-all@freebsd.org Mon Mar 25 21:38:59 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7E7D9154E9FC; Mon, 25 Mar 2019 21:38:59 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 207AE88A08; Mon, 25 Mar 2019 21:38:59 +0000 (UTC) (envelope-from markj@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 mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id EAC2ADC5B; Mon, 25 Mar 2019 21:38:58 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x2PLcwlI025575; Mon, 25 Mar 2019 21:38:58 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x2PLcwJr025574; Mon, 25 Mar 2019 21:38:58 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201903252138.x2PLcwJr025574@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Mon, 25 Mar 2019 21:38:58 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r345513 - head/sys/kern X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/sys/kern X-SVN-Commit-Revision: 345513 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 207AE88A08 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.97 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.97)[-0.973,0] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 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: Mon, 25 Mar 2019 21:38:59 -0000 Author: markj Date: Mon Mar 25 21:38:58 2019 New Revision: 345513 URL: https://svnweb.freebsd.org/changeset/base/345513 Log: Reject F_SETLK_REMOTE commands when sysid == 0. A sysid of 0 denotes the local system, and some handlers for remote locking commands do not attempt to deal with local locks. Note that F_SETLK_REMOTE is only available to privileged users as it is intended to be used as a testing interface. Reviewed by: kib Reported by: syzbot+9c457a6ae014a3281eb8@syzkaller.appspotmail.com MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D19702 Modified: head/sys/kern/kern_descrip.c Modified: head/sys/kern/kern_descrip.c ============================================================================== --- head/sys/kern/kern_descrip.c Mon Mar 25 21:14:51 2019 (r345512) +++ head/sys/kern/kern_descrip.c Mon Mar 25 21:38:58 2019 (r345513) @@ -601,7 +601,7 @@ kern_fcntl(struct thread *td, int fd, int cmd, intptr_ case F_SETLK_REMOTE: error = priv_check(td, PRIV_NFS_LOCKD); - if (error) + if (error != 0) return (error); flg = F_REMOTE; goto do_setlk; @@ -612,6 +612,12 @@ kern_fcntl(struct thread *td, int fd, int cmd, intptr_ case F_SETLK: do_setlk: + flp = (struct flock *)arg; + if ((flg & F_REMOTE) != 0 && flp->l_sysid == 0) { + error = EINVAL; + break; + } + error = fget_unlocked(fdp, fd, &cap_flock_rights, &fp, NULL); if (error != 0) break; @@ -621,7 +627,6 @@ kern_fcntl(struct thread *td, int fd, int cmd, intptr_ break; } - flp = (struct flock *)arg; if (flp->l_whence == SEEK_CUR) { foffset = foffset_get(fp); if (foffset < 0 || @@ -667,10 +672,6 @@ kern_fcntl(struct thread *td, int fd, int cmd, intptr_ flp, flg); break; case F_UNLCKSYS: - /* - * Temporary api for testing remote lock - * infrastructure. - */ if (flg != F_REMOTE) { error = EINVAL; break;