I am uploading a NMU to fix this.
Please find the debdiff attached.
diff -Nru denemo-2.6.39/debian/changelog denemo-2.6.39/debian/changelog
--- denemo-2.6.39/debian/changelog 2025-02-14 21:05:17.000000000 +0000
+++ denemo-2.6.39/debian/changelog 2025-04-09 18:55:42.000000000 +0000
@@ -1,3 +1,10 @@
+denemo (2.6.39-0.2) unstable; urgency=high
+
+ * Non-maintainer upload
+ * Fix stack smashing on s390x (Closes: #1102503)
+
+ -- Bastian Germann <
bage@debian.org> Wed, 09 Apr 2025 18:55:42 +0000
+
denemo (2.6.39-0.1) unstable; urgency=medium
* Non-maintainer upload
diff -Nru denemo-2.6.39/debian/patches/0005-fix-stack-smashing.patch denemo-2.6.39/debian/patches/0005-fix-stack-smashing.patch
--- denemo-2.6.39/debian/patches/0005-fix-stack-smashing.patch 1970-01-01 00:00:00.000000000 +0000
+++ denemo-2.6.39/debian/patches/0005-fix-stack-smashing.patch 2025-04-09 18:42:36.000000000 +0000
@@ -0,0 +1,16 @@
+Origin: upstream, c111f4339a9f4f3238676cc1391fe9ef194a1679
+From: Richard Shann <
richard@rshann.plus.com>
+Date: Wed, 9 Apr 2025 17:24:18 +0100
+Subject: Fix bug #67002: Fix Stack overflow
+---
+--- a/src/export/exportlilypo