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From 0c74a9f49b8d7a36b17b54a7428b3526d20f88a8 Mon Sep 17 00:00:00 2001
From: Scott Gayou <github.scott@gmail.com>
Date: Wed, 23 Jan 2019 15:03:53 -0500
Subject: [PATCH] Fix for simple memory leak that was assigned CVE-2019-6128.

pal2rgb failed to free memory on a few errors. This was reported
here: http://bugzilla.maptools.org/show_bug.cgi?id=2836.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Retrieved from:
https://gitlab.com/libtiff/libtiff/commit/ae0bed1fe530a82faf2e9ea1775109dbf301a971]
---
 tools/pal2rgb.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/pal2rgb.c b/tools/pal2rgb.c
index 01d8502e..9492f1cf 100644
--- a/tools/pal2rgb.c
+++ b/tools/pal2rgb.c
@@ -118,12 +118,14 @@ main(int argc, char* argv[])
 	    shortv != PHOTOMETRIC_PALETTE) {
 		fprintf(stderr, "%s: Expecting a palette image.\n",
 		    argv[optind]);
+		(void) TIFFClose(in);
 		return (-1);
 	}
 	if (!TIFFGetField(in, TIFFTAG_COLORMAP, &rmap, &gmap, &bmap)) {
 		fprintf(stderr,
 		    "%s: No colormap (not a valid palette image).\n",
 		    argv[optind]);
+		(void) TIFFClose(in);
 		return (-1);
 	}
 	bitspersample = 0;
@@ -131,11 +133,14 @@ main(int argc, char* argv[])
 	if (bitspersample != 8) {
 		fprintf(stderr, "%s: Sorry, can only handle 8-bit images.\n",
 		    argv[optind]);
+		(void) TIFFClose(in);
 		return (-1);
 	}
 	out = TIFFOpen(argv[optind+1], "w");
-	if (out == NULL)
+	if (out == NULL) {
+		(void) TIFFClose(in);
 		return (-2);
+	}
 	cpTags(in, out);
 	TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &imagewidth);
 	TIFFGetField(in, TIFFTAG_IMAGELENGTH, &imagelength);
-- 
2.18.1