multipathd crash on shutdown

On shutdown multipathd flushes its internal message queue;
but we have to check if the messages on the queue are not empty.

Signed-off-by: Hannes Reinecke <hare@suse.de>

diff --git a/libmultipath/log_pthread.c b/libmultipath/log_pthread.c
index d393ff4..8909440 100644 (file)
--- a/libmultipath/log_pthread.c
+++ b/libmultipath/log_pthread.c
@@ -31,7 +31,8 @@ static void flush_logqueue (void)
                pthread_mutex_lock(logq_lock);
                empty = log_dequeue(la->buff);
                pthread_mutex_unlock(logq_lock);
-               log_syslog(la->buff);
+               if (!empty)
+                       log_syslog(la->buff);
        } while (empty == 0);
 }