From owner-svn-src-stable@freebsd.org Fri Apr 19 12:30:16 2019 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 8B25A158F5D4; Fri, 19 Apr 2019 12:30:16 +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 2D1377430D; Fri, 19 Apr 2019 12:30:16 +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 055852E3F2; Fri, 19 Apr 2019 12:30:16 +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 x3JCUFwu067572; Fri, 19 Apr 2019 12:30:15 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x3JCUFCN067571; Fri, 19 Apr 2019 12:30:15 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201904191230.x3JCUFCN067571@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 19 Apr 2019 12:30:15 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r346371 - stable/12/lib/libthr/thread X-SVN-Group: stable-12 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/12/lib/libthr/thread X-SVN-Commit-Revision: 346371 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 2D1377430D X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 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(-0.98)[-0.977,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 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: Fri, 19 Apr 2019 12:30:16 -0000 Author: kib Date: Fri Apr 19 12:30:15 2019 New Revision: 346371 URL: https://svnweb.freebsd.org/changeset/base/346371 Log: MFC r346158: Do not access mutex memory after unlock. PR: 237195 Modified: stable/12/lib/libthr/thread/thr_mutex.c Directory Properties: stable/12/ (props changed) Modified: stable/12/lib/libthr/thread/thr_mutex.c ============================================================================== --- stable/12/lib/libthr/thread/thr_mutex.c Fri Apr 19 10:52:54 2019 (r346370) +++ stable/12/lib/libthr/thread/thr_mutex.c Fri Apr 19 12:30:15 2019 (r346371) @@ -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); }