From aea93debfa1281a7d5f1523225b043955c1c2472 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 19 Nov 2013 01:21:27 +0100
Subject: [PATCH] bus: bump serial number counter when sending already sealed
 messages

---
 src/libsystemd-bus/sd-bus.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index d93138bb152..0be5a29f367 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -1271,8 +1271,13 @@ static int bus_seal_message(sd_bus *b, sd_bus_message *m) {
         if (m->header->version > b->message_version)
                 return -EPERM;
 
-        if (m->sealed)
+        if (m->sealed) {
+                /* If we copy the same message to multiple
+                 * destinations, avoid using the same serial
+                 * numbers. */
+                b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m));
                 return 0;
+        }
 
         return bus_message_seal(m, ++b->serial);
 }