From fae9f834516b6729852ebb7665be3a9d89de666c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andrius=20=C5=A0tikonas?= <andrius@stikonas.eu>
Date: Thu, 26 Nov 2020 21:58:24 +0000
Subject: [PATCH] Fix division by zero.

---
 src/util/externalcommandhelper.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/util/externalcommandhelper.cpp b/src/util/externalcommandhelper.cpp
index 9c68226..fc11591 100644
--- a/src/util/externalcommandhelper.cpp
+++ b/src/util/externalcommandhelper.cpp
@@ -158,6 +158,11 @@ QVariantMap ExternalCommandHelper::CopyBlocks(const QString& sourceDevice, const
     if (!isCallerAuthorized()) {
         return QVariantMap();
     }
+
+    // Avoid division by zero further down
+    if (!blockSize) {
+        return QVariantMap();
+    }
     QVariantMap reply;
     reply[QStringLiteral("success")] = true;