From owner-svn-src-stable@freebsd.org Mon Apr 16 20:45:22 2018 Return-Path: Delivered-To: svn-src-stable@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 37E76FA46C1; Mon, 16 Apr 2018 20:45:22 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E06EB7E51F; Mon, 16 Apr 2018 20:45:21 +0000 (UTC) (envelope-from jhb@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 D726E225A8; Mon, 16 Apr 2018 20:45:21 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w3GKjLTk036571; Mon, 16 Apr 2018 20:45:21 GMT (envelope-from jhb@FreeBSD.org) Received: (from jhb@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w3GKjLIx036570; Mon, 16 Apr 2018 20:45:21 GMT (envelope-from jhb@FreeBSD.org) Message-Id: <201804162045.w3GKjLIx036570@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhb set sender to jhb@FreeBSD.org using -f From: John Baldwin Date: Mon, 16 Apr 2018 20:45:21 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r332633 - in stable: 10/lib/libthr/thread 11/lib/libthr/thread X-SVN-Group: stable-10 X-SVN-Commit-Author: jhb X-SVN-Commit-Paths: in stable: 10/lib/libthr/thread 11/lib/libthr/thread X-SVN-Commit-Revision: 332633 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Apr 2018 20:45:22 -0000 Author: jhb Date: Mon Apr 16 20:45:21 2018 New Revision: 332633 URL: https://svnweb.freebsd.org/changeset/base/332633 Log: MFC 331324: Ensure thread library is initialized in pthread_testcancel(). Call _thr_check_init() before reading curthread in pthread_testcancel(). If a constructor in a library creates a semaphore via sem_init() and then waits for it via sem_wait(), the program can core dump in _pthread_testcancel() called from sem_wait(). This is because the semaphore implementation lives in libc, so the library's constructors can be run before libthr's constructors. Sponsored by: DARPA / AFRL Modified: stable/10/lib/libthr/thread/thr_cancel.c Directory Properties: stable/10/ (props changed) Changes in other areas also in this revision: Modified: stable/11/lib/libthr/thread/thr_cancel.c Directory Properties: stable/11/ (props changed) Modified: stable/10/lib/libthr/thread/thr_cancel.c ============================================================================== --- stable/10/lib/libthr/thread/thr_cancel.c Mon Apr 16 19:33:04 2018 (r332632) +++ stable/10/lib/libthr/thread/thr_cancel.c Mon Apr 16 20:45:21 2018 (r332633) @@ -130,8 +130,10 @@ _pthread_setcanceltype(int type, int *oldtype) void _pthread_testcancel(void) { - struct pthread *curthread = _get_curthread(); + struct pthread *curthread; + _thr_check_init(); + curthread = _get_curthread(); testcancel(curthread); }