sig_timedwait: Pending signal structure used after it has been releasd. From anonymous Bitbucket Issue 59.

sched/signal/sig_timedwait.c

@@ -234,14 +234,14 @@ int sigtimedwait(FAR const sigset_t *set, FAR struct siginfo *info,
           memcpy(info, &sigpend->info, sizeof(struct siginfo));
         }
 
+      /* The return value is the number of the signal that awakened us */
+
+      ret = sigpend->info.si_signo;
+
       /* Then dispose of the pending signal structure properly */
 
       sig_releasependingsignal(sigpend);
       leave_critical_section(flags);
-
-      /* The return value is the number of the signal that awakened us */
-
-      ret = sigpend->info.si_signo;
     }
 
   /* We will have to wait for a signal to be posted to this task. */