From 4780ba94001087e0005e3784471ef7a7077c78aa Mon Sep 17 00:00:00 2001
From: Daniel Hilst Selli <392820+dhilst@users.noreply.github.com>
Date: Thu, 26 Feb 2026 13:54:56 -0300
Subject: [PATCH] fix: Fix genesis loop where osimage value grows at each boot

Signed-off-by: Daniel Hilst Selli <392820+dhilst@users.noreply.github.com>
---
 xCAT-server/lib/xcat/plugins/seqdiscovery.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xCAT-server/lib/xcat/plugins/seqdiscovery.pm b/xCAT-server/lib/xcat/plugins/seqdiscovery.pm
index a40960209..ddd0c2df2 100644
--- a/xCAT-server/lib/xcat/plugins/seqdiscovery.pm
+++ b/xCAT-server/lib/xcat/plugins/seqdiscovery.pm
@@ -379,7 +379,9 @@ sub findme {
                     if ($nodechain !~ /osimage=/) {
                         $nodechain = $nodechain . ",osimage=$param{'osimage'}";
                     } else {
-                        $nodechain =~ s/osimage=\w+/osimage=$param{'osimage'}/;
+                        # Replace the full osimage token up to chain separator.
+                        # Using \w+ corrupts image names containing '.' or '-'.
+                        $nodechain =~ s/osimage=[^,;]+/osimage=$param{'osimage'}/;
                     }
                 }
             }    # end if $param{'osimage'}