From f8fea04d1d19dc2299a4fc3434c7cbe94e544ec3 Mon Sep 17 00:00:00 2001
From: Packit <packit>
Date: Sep 14 2020 07:14:30 +0000
Subject: Apply patch libtiff-CVE-2018-12900.patch


patch_name: libtiff-CVE-2018-12900.patch
present_in_specfile: true

---

diff --git a/tools/tiffcp.c b/tools/tiffcp.c
index 489459a..96f1472 100644
--- a/tools/tiffcp.c
+++ b/tools/tiffcp.c
@@ -43,6 +43,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <limits.h>
 
 #include <ctype.h>
 
@@ -1391,7 +1392,7 @@ DECLAREreadFunc(readSeparateTilesIntoBuffer)
 	int status = 1;
 	uint32 imagew = TIFFRasterScanlineSize(in);
 	uint32 tilew = TIFFTileRowSize(in);
-	int iskew  = imagew - tilew*spp;
+	int iskew;
 	tsize_t tilesize = TIFFTileSize(in);
 	tdata_t tilebuf;
 	uint8* bufp = (uint8*) buf;
@@ -1399,6 +1400,12 @@ DECLAREreadFunc(readSeparateTilesIntoBuffer)
 	uint32 row;
 	uint16 bps = 0, bytes_per_sample;
 
+	if (tilew && spp > (INT_MAX / tilew))
+	{
+		TIFFError(TIFFFileName(in), "Error, cannot handle that much samples per tile row (Tile Width * Samples/Pixel)");
+		return 0;
+	}
+	iskew = imagew - tilew*spp;
 	tilebuf = _TIFFmalloc(tilesize);
 	if (tilebuf == 0)
 		return 0;