From owner-svn-src-all@freebsd.org Fri Apr 12 17:27:20 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 2AFEC1581EEE; Fri, 12 Apr 2019 17:27:20 +0000 (UTC) (envelope-from kib@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 BB88C84A2F; Fri, 12 Apr 2019 17:27:19 +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 mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 92B9D2489B; Fri, 12 Apr 2019 17:27:19 +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 x3CHRJaQ080840; Fri, 12 Apr 2019 17:27:19 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x3CHRJnh080839; Fri, 12 Apr 2019 17:27:19 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201904121727.x3CHRJnh080839@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 12 Apr 2019 17:27:19 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r346158 - head/lib/libthr/thread X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/lib/libthr/thread X-SVN-Commit-Revision: 346158 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: BB88C84A2F X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 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(-0.95)[-0.952,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] 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: Fri, 12 Apr 2019 17:27:20 -0000 Author: kib Date: Fri Apr 12 17:27:19 2019 New Revision: 346158 URL: https://svnweb.freebsd.org/changeset/base/346158 Log: Do not access mutex memory after unlock. PR: 237195 Reported by: freebsd@hurrikhan.eu Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/lib/libthr/thread/thr_mutex.c Modified: head/lib/libthr/thread/thr_mutex.c ============================================================================== --- head/lib/libthr/thread/thr_mutex.c Fri Apr 12 17:11:50 2019 (r346157) +++ head/lib/libthr/thread/thr_mutex.c Fri Apr 12 17:27:19 2019 (r346158) @@ -949,7 +949,7 @@ mutex_unlock_common(struct pthread_mutex *m, bool cv, { struct pthread *curthread; uint32_t id; - int deferred, error, robust; + int deferred, error, private, robust; if (__predict_false(m <= THR_MUTEX_DESTROYED)) { if (m == THR_MUTEX_DESTROYED) @@ -967,6 +967,7 @@ mutex_unlock_common(struct pthread_mutex *m, bool cv, return (EPERM); error = 0; + private = (m->m_flags & PMUTEX_FLAG_PRIVATE) != 0; if (__predict_false(PMUTEX_TYPE(m->m_flags) == PTHREAD_MUTEX_RECURSIVE && m->m_count > 0)) { m->m_count--; @@ -991,7 +992,7 @@ mutex_unlock_common(struct pthread_mutex *m, bool cv, if (robust) _mutex_leave_robust(curthread, m); } - if (!cv && m->m_flags & PMUTEX_FLAG_PRIVATE) + if (!cv && private) THR_CRITICAL_LEAVE(curthread); return (error); }