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Fri, 19 Apr 2019 12:31:17 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201904191231.x3JCVHHo070664@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r346372 - stable/11/lib/libthr/thread X-SVN-Group: stable-11 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/11/lib/libthr/thread X-SVN-Commit-Revision: 346372 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk X-Loop: FreeBSD.org Sender: owner-src-committers@freebsd.org X-Rspamd-Queue-Id: 4A07B744EC 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_SHORT(-0.98)[-0.982,0]; ASN(0.00)[asn:11403, ipnet:96.47.64.0/20, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] Status: O X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Tue, 03 Sep 2019 14:07:10 -0000 X-Original-Date: Fri, 19 Apr 2019 12:31:17 +0000 (UTC) X-List-Received-Date: Tue, 03 Sep 2019 14:07:10 -0000 Author: kib Date: Fri Apr 19 12:31:16 2019 New Revision: 346372 URL: https://svnweb.freebsd.org/changeset/base/346372 Log: MFC r346158: Do not access mutex memory after unlock. PR: 237195 Modified: stable/11/lib/libthr/thread/thr_mutex.c Directory Properties: stable/11/ (props changed) Modified: stable/11/lib/libthr/thread/thr_mutex.c ============================================================================== --- stable/11/lib/libthr/thread/thr_mutex.c Fri Apr 19 12:30:15 2019 (r346371) +++ stable/11/lib/libthr/thread/thr_mutex.c Fri Apr 19 12:31:16 2019 (r346372) @@ -945,7 +945,7 @@ 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) @@ -963,6 +963,7 @@ 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--; @@ -987,7 +988,7 @@ 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); }