2 files changed, 24 insertions, 0 deletions

diff --git a/scripts/lib/wic/ksparser.py b/scripts/lib/wic/ksparser.py
index 76cc55b848..127ca79ade 100644
--- a/scripts/lib/wic/ksparser.py
+++ b/scripts/lib/wic/ksparser.py
@@ -228,6 +228,23 @@ class KickStart():
                                 err = "%s:%d: SquashFS does not support LABEL" \
                                        % (confpath, lineno)
                                 raise KickStartError(err)
+                        if parsed.fstype == 'msdos' or parsed.fstype == 'vfat':
+                            if parsed.fsuuid:
+                                if parsed.fsuuid.upper().startswith('0X'):
+                                    if len(parsed.fsuuid) > 10:
+                                        err = "%s:%d: fsuuid %s given in wks kickstart file " \
+                                              "exceeds the length limit for %s filesystem. " \
+                                              "It should be in the form of a 32 bit hexadecimal" \
+                                              "number (for example, 0xABCD1234)." \
+                                              % (confpath, lineno, parsed.fsuuid, parsed.fstype)
+                                        raise KickStartError(err)
+                                elif len(parsed.fsuuid) > 8:
+                                    err = "%s:%d: fsuuid %s given in wks kickstart file " \
+                                          "exceeds the length limit for %s filesystem. " \
+                                          "It should be in the form of a 32 bit hexadecimal" \
+                                          "number (for example, 0xABCD1234)." \
+                                          % (confpath, lineno, parsed.fsuuid, parsed.fstype)
+                                    raise KickStartError(err)
                         if parsed.use_label and not parsed.label:
                             err = "%s:%d: Must set the label with --label" \
                                   % (confpath, lineno)
diff --git a/scripts/lib/wic/plugins/imager/direct.py b/scripts/lib/wic/plugins/imager/direct.py
index 55db826e93..0ca67b77d5 100644
--- a/scripts/lib/wic/plugins/imager/direct.py
+++ b/scripts/lib/wic/plugins/imager/direct.py
@@ -343,6 +343,13 @@ class PartitionedImage():
                     part.fsuuid = '0x' + str(uuid.uuid4())[:8].upper()
                 else:
                     part.fsuuid = str(uuid.uuid4())
+            else:
+                #make sure the fsuuid for vfat/msdos align with format 0xYYYYYYYY
+                if part.fstype == 'vfat' or part.fstype == 'msdos':
+                    if part.fsuuid.upper().startswith("0X"):
+                        part.fsuuid = '0x' + part.fsuuid.upper()[2:].rjust(8,"0")
+                    else:
+                        part.fsuuid = '0x' + part.fsuuid.upper().rjust(8,"0")
 
     def prepare(self, imager):
         """Prepare an image. Call prepare method of all image partitions."""