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);
}
_______________________________________________
svn-src-all@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
