From 4bc78e7bb4c9e0923ca33103718ec60bfa2367f2 Mon Sep 17 00:00:00 2001
From: Prokhorov Kirill <kirill.prohorov@onlyoffice.com>
Date: Tue, 28 Oct 2025 11:16:53 +0300
Subject: [PATCH] Fix bug 74748

---
 DesktopEditor/cximage/CxImage/tif_xfile.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/DesktopEditor/cximage/CxImage/tif_xfile.cpp b/DesktopEditor/cximage/CxImage/tif_xfile.cpp
index ca622db311..be0c2c3d0a 100644
--- a/DesktopEditor/cximage/CxImage/tif_xfile.cpp
+++ b/DesktopEditor/cximage/CxImage/tif_xfile.cpp
@@ -16,7 +16,15 @@
 static tsize_t 
 _tiffReadProcEx(thandle_t fd, tdata_t buf, tsize_t size)
 {
-	return (tsize_t)((CxFile*)fd)->Read(buf, 1, size);
+	tsize_t nReadCount = (tsize_t)((CxFile*)fd)->Read(buf, 1, size);
+
+	if (nReadCount < size)
+	{
+		memset(static_cast<char*>(buf) + nReadCount, 0, size - nReadCount);
+		return size;
+	}
+
+	return nReadCount;
 }
 
 static tsize_t