[gnome-continuous-yocto/gnomeostree-3.28-rocko: 7067/8267] wic: improve generating disk system identifier

[Emmanuele Bassi <ebassi src gnome org>]

commit 843a74d708a91b392f3293cf857495069bd14a13
Author: Jonathan Liu <net147 gmail com>
Date:   Mon Jul 31 20:53:39 2017 +1000

    wic: improve generating disk system identifier
    
    This should reduce the chance of generating 0xffffffff as the disk
    system identifier.
    
    (From OE-Core rev: 5619e72facbc9228d3cf8f844f198e03b536ac8c)
    
    Signed-off-by: Jonathan Liu <net147 gmail com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 scripts/lib/wic/plugins/imager/direct.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/scripts/lib/wic/plugins/imager/direct.py b/scripts/lib/wic/plugins/imager/direct.py
index 51bdd3a..5765bbb 100644
--- a/scripts/lib/wic/plugins/imager/direct.py
+++ b/scripts/lib/wic/plugins/imager/direct.py
@@ -26,6 +26,7 @@
 
 import logging
 import os
+import random
 import shutil
 import tempfile
 import uuid
@@ -303,7 +304,7 @@ class PartitionedImage():
                           # all partitions (in bytes)
         self.ptable_format = ptable_format  # Partition table format
         # Disk system identifier
-        self.identifier = int.from_bytes(os.urandom(4), 'little') or 0xffffffff
+        self.identifier = random.SystemRandom().randint(1, 0xffffffff)
 
         self.partitions = partitions
         self.partimages = []