From 7d7b3db2705ca78f0963734ab5a5e4671c7762bb Mon Sep 17 00:00:00 2001
From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
Date: Sun, 31 May 2015 21:24:44 +0000
Subject: [PATCH] (LogLuvEncodeTile): Fix Coverity 991241 "Division or modulo
 by zero".

---
 ChangeLog         | 2 ++
 libtiff/tif_luv.c | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 1de8f91f..ed0b1c7e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,8 @@
 	zero".
 	(LogLuvEncodeStrip): Fix Coverity 991240 "Division or modulo by
 	zero".
+	(LogLuvEncodeTile): Fix Coverity 991241 "Division or modulo by
+	zero".
 
 	* libtiff/tif_dirread.c (TIFFReadDirEntryDoubleArray): Fix
 	Coverity 298626 "Logically dead code".
diff --git a/libtiff/tif_luv.c b/libtiff/tif_luv.c
index 37193742..d2952a8a 100644
--- a/libtiff/tif_luv.c
+++ b/libtiff/tif_luv.c
@@ -1,4 +1,4 @@
-/* $Id: tif_luv.c,v 1.38 2015-05-31 21:23:23 bfriesen Exp $ */
+/* $Id: tif_luv.c,v 1.39 2015-05-31 21:24:44 bfriesen Exp $ */
 
 /*
  * Copyright (c) 1997 Greg Ward Larson
@@ -668,6 +668,9 @@ LogLuvEncodeTile(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
 {
 	tmsize_t rowlen = TIFFTileRowSize(tif);
 
+        if (rowlen == 0)
+                return 0;
+
 	assert(cc%rowlen == 0);
 	while (cc && (*tif->tif_encoderow)(tif, bp, rowlen, s) == 1)
 		bp += rowlen, cc -= rowlen;