gentoo-overlay/media-libs/tiff/files/tiff-4.0.7-bug2651.patch

From 669faf71833c4c2e72774b2e732ca4d28b149c83 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Wed, 11 Jan 2017 19:02:49 +0000
Subject: [PATCH] * libtiff/tiffiop.h, tif_unix.c, tif_win32.c, tif_vms.c: add
 _TIFFcalloc()

* libtiff/tif_read.c: TIFFReadBufferSetup(): use _TIFFcalloc() to zero
initialize tif_rawdata.
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2651
---
 ChangeLog           |  8 ++++++++
 libtiff/tif_read.c  |  6 ++++--
 libtiff/tif_unix.c  | 10 +++++++++-
 libtiff/tif_vms.c   | 10 +++++++++-
 libtiff/tif_win32.c | 10 +++++++++-
 libtiff/tiffio.h    |  3 ++-
 6 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/libtiff/tif_read.c b/libtiff/tif_read.c
index b2edb029a90c..6a8c7daf3dfa 100644
--- a/libtiff/tif_read.c
+++ b/libtiff/tif_read.c
@@ -985,7 +985,9 @@ TIFFReadBufferSetup(TIFF* tif, void* bp, tmsize_t size)
 				 "Invalid buffer size");
 		    return (0);
 		}
-		tif->tif_rawdata = (uint8*) _TIFFmalloc(tif->tif_rawdatasize);
+		/* Initialize to zero to avoid uninitialized buffers in case of */
+                /* short reads (http://bugzilla.maptools.org/show_bug.cgi?id=2651) */
+		tif->tif_rawdata = (uint8*) _TIFFcalloc(1, tif->tif_rawdatasize);
 		tif->tif_flags |= TIFF_MYBUFFER;
 	}
 	if (tif->tif_rawdata == NULL) {
diff --git a/libtiff/tif_unix.c b/libtiff/tif_unix.c
index 81e9d6653c2a..80c437cfa37a 100644
--- a/libtiff/tif_unix.c
+++ b/libtiff/tif_unix.c
@@ -316,6 +316,14 @@ _TIFFmalloc(tmsize_t s)
 	return (malloc((size_t) s));
 }
 
+void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
+{
+    if( nmemb == 0 || siz == 0 )
+        return ((void *) NULL);
+
+    return calloc((size_t) nmemb, (size_t)siz);
+}
+
 void
 _TIFFfree(void* p)
 {
diff --git a/libtiff/tif_win32.c b/libtiff/tif_win32.c
index 24b824f1bd56..090baed87135 100644
--- a/libtiff/tif_win32.c
+++ b/libtiff/tif_win32.c
@@ -360,6 +360,14 @@ _TIFFmalloc(tmsize_t s)
 	return (malloc((size_t) s));
 }
 
+void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
+{
+    if( nmemb == 0 || siz == 0 )
+        return ((void *) NULL);
+
+    return calloc((size_t) nmemb, (size_t)siz);
+}
+
 void
 _TIFFfree(void* p)
 {
diff --git a/libtiff/tiffio.h b/libtiff/tiffio.h
index 6e508181dbce..ef61b5c06a03 100644
--- a/libtiff/tiffio.h
+++ b/libtiff/tiffio.h
@@ -293,6 +293,7 @@ extern TIFFCodec* TIFFGetConfiguredCODECs(void);
  */
 
 extern void* _TIFFmalloc(tmsize_t s);
+extern void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz);
 extern void* _TIFFrealloc(void* p, tmsize_t s);
 extern void _TIFFmemset(void* p, int v, tmsize_t c);
 extern void _TIFFmemcpy(void* d, const void* s, tmsize_t c);
-- 
2.12.0