[rtems commit] posix: Fix pthread_spin_unlock()

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    2b9fb3141cb10b8bbfa1a18a6aab42474988a636
Changeset: http://git.rtems.org/rtems/commit/?id=2b9fb3141cb10b8bbfa1a18a6aab42474988a636

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Mon Oct 19 16:31:51 2020 +0200

posix: Fix pthread_spin_unlock()

Prevent a call to _SMP_lock_Stats_register_or_max_section_time().  This fixes a
thread stack corruption in case RTEMS_PROFILING and RTEMS_SMP is enabled.

Close #4157.

---

 cpukit/posix/src/pspinunlock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpukit/posix/src/pspinunlock.c b/cpukit/posix/src/pspinunlock.c
index ca36a5f..5c02012 100644
--- a/cpukit/posix/src/pspinunlock.c
+++ b/cpukit/posix/src/pspinunlock.c
@@ -40,7 +40,7 @@ int pthread_spin_unlock( pthread_spinlock_t *lock )
 #if defined(RTEMS_PROFILING)
   /* This is a hack to get around the lock profiling statistics */
   unused_stats.total_section_time = 0;
-  unused_stats.max_section_time = 0;
+  unused_stats.max_section_time = UINT32_MAX;
   unused_context.stats = &unused_stats;
   unused_context.acquire_instant = 0;
 #endif