merge revision(s) c1d78a7f0ece2004822193a0c1f1fd3dc38c2fdf: [Backport #15360]

	do_mutex_lock: release mutex before checking for interrupts (fixes
	 issue 15360)


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@67764 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 1 deletions

diff --git a/thread_sync.c b/thread_sync.c
index 8964e24a5f..f775d44451 100644
--- a/thread_sync.c
+++ b/thread_sync.c
@@ -289,14 +289,18 @@ do_mutex_lock(VALUE self, int interruptible_p)
 		th->status = prev_status;
 	    }
 	    th->vm->sleeper--;
-	    if (mutex->th == th) mutex_locked(th, self);
 
             if (interruptible_p) {
+                /* release mutex before checking for interrupts...as interrupt checking
+                 * code might call rb_raise() */
+                if (mutex->th == th) mutex->th = 0;
                 RUBY_VM_CHECK_INTS_BLOCKING(th->ec); /* may release mutex */
                 if (!mutex->th) {
                     mutex->th = th;
                     mutex_locked(th, self);
                 }
+            } else {
+                if (mutex->th == th) mutex_locked(th, self);
             }
 	}
     }