jasper: add upstream security fix for CVE-2017-6850

Fixes a NULL pointer dereference in jp2_cdef_destroy:

https://blogs.gentoo.org/ago/2017/01/25/jasper-null-pointer-dereference-in-jp2_cdef_destroy-jp2_cod-c/

https://github.com/mdadams/jasper/issues/112

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit a105443b24f7c75b10dab44c2916fc9f2b58363a)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/jasper/0002-Fixed-bugs-due-to-uninitialized-data-in-the-JP2-deco.patch

@@ -0,0 +1,286 @@
+From e96fc4fdd525fa0ede28074a7e2b1caf94b58b0d Mon Sep 17 00:00:00 2001
+From: Michael Adams <mdadams@ece.uvic.ca>
+Date: Sat, 4 Mar 2017 14:43:24 -0800
+Subject: [PATCH] Fixed bugs due to uninitialized data in the JP2 decoder.
+ Also, added some comments marking I/O stream interfaces that probably need to
+ be changed (in the long term) to fix integer overflow problems.
+
+Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
+---
+ src/libjasper/base/jas_stream.c | 18 +++++++++++++++++
+ src/libjasper/jp2/jp2_cod.c     | 44 ++++++++++++++++++++++++++++-------------
+ 2 files changed, 48 insertions(+), 14 deletions(-)
+
+diff --git a/src/libjasper/base/jas_stream.c b/src/libjasper/base/jas_stream.c
+index 327ee57..d70408f 100644
+--- a/src/libjasper/base/jas_stream.c
++++ b/src/libjasper/base/jas_stream.c
+@@ -664,6 +664,7 @@ int jas_stream_ungetc(jas_stream_t *stream, int c)
+ 	return 0;
+ }
+ 
++/* FIXME integral type */
+ int jas_stream_read(jas_stream_t *stream, void *buf, int cnt)
+ {
+ 	int n;
+@@ -690,6 +691,7 @@ int jas_stream_read(jas_stream_t *stream, void *buf, int cnt)
+ 	return n;
+ }
+ 
++/* FIXME integral type */
+ int jas_stream_write(jas_stream_t *stream, const void *buf, int cnt)
+ {
+ 	int n;
+@@ -742,6 +744,7 @@ int jas_stream_puts(jas_stream_t *stream, const char *s)
+ 	return 0;
+ }
+ 
++/* FIXME integral type */
+ char *jas_stream_gets(jas_stream_t *stream, char *buf, int bufsize)
+ {
+ 	int c;
+@@ -765,6 +768,7 @@ char *jas_stream_gets(jas_stream_t *stream, char *buf, int bufsize)
+ 	return buf;
+ }
+ 
++/* FIXME integral type */
+ int jas_stream_gobble(jas_stream_t *stream, int n)
+ {
+ 	int m;
+@@ -783,6 +787,7 @@ int jas_stream_gobble(jas_stream_t *stream, int n)
+ 	return n;
+ }
+ 
++/* FIXME integral type */
+ int jas_stream_pad(jas_stream_t *stream, int n, int c)
+ {
+ 	int m;
+@@ -885,6 +890,7 @@ long jas_stream_tell(jas_stream_t *stream)
+ * Buffer initialization code.
+ \******************************************************************************/
+ 
++/* FIXME integral type */
+ static void jas_stream_initbuf(jas_stream_t *stream, int bufmode, char *buf,
+   int bufsize)
+ {
+@@ -1060,6 +1066,7 @@ static int jas_strtoopenmode(const char *s)
+ 	return openmode;
+ }
+ 
++/* FIXME integral type */
+ int jas_stream_copy(jas_stream_t *out, jas_stream_t *in, int n)
+ {
+ 	int all;
+@@ -1085,6 +1092,7 @@ int jas_stream_copy(jas_stream_t *out, jas_stream_t *in, int n)
+ 	return 0;
+ }
+ 
++/* FIXME integral type */
+ long jas_stream_setrwcount(jas_stream_t *stream, long rwcnt)
+ {
+ 	int old;
+@@ -1094,6 +1102,7 @@ long jas_stream_setrwcount(jas_stream_t *stream, long rwcnt)
+ 	return old;
+ }
+ 
++/* FIXME integral type */
+ int jas_stream_display(jas_stream_t *stream, FILE *fp, int n)
+ {
+ 	unsigned char buf[16];
+@@ -1168,6 +1177,7 @@ long jas_stream_length(jas_stream_t *stream)
+ * Memory stream object.
+ \******************************************************************************/
+ 
++/* FIXME integral type */
+ static int mem_read(jas_stream_obj_t *obj, char *buf, int cnt)
+ {
+ 	ssize_t n;
+@@ -1209,6 +1219,7 @@ static int mem_resize(jas_stream_memobj_t *m, size_t bufsize)
+ 	return 0;
+ }
+ 
++/* FIXME integral type */
+ static int mem_write(jas_stream_obj_t *obj, char *buf, int cnt)
+ {
+ 	size_t n;
+@@ -1264,6 +1275,7 @@ static int mem_write(jas_stream_obj_t *obj, char *buf, int cnt)
+ 	return ret;
+ }
+ 
++/* FIXME integral type */
+ static long mem_seek(jas_stream_obj_t *obj, long offset, int origin)
+ {
+ 	jas_stream_memobj_t *m = (jas_stream_memobj_t *)obj;
+@@ -1310,6 +1322,7 @@ static int mem_close(jas_stream_obj_t *obj)
+ * File stream object.
+ \******************************************************************************/
+ 
++/* FIXME integral type */
+ static int file_read(jas_stream_obj_t *obj, char *buf, int cnt)
+ {
+ 	jas_stream_fileobj_t *fileobj;
+@@ -1318,6 +1331,7 @@ static int file_read(jas_stream_obj_t *obj, char *buf, int cnt)
+ 	return read(fileobj->fd, buf, cnt);
+ }
+ 
++/* FIXME integral type */
+ static int file_write(jas_stream_obj_t *obj, char *buf, int cnt)
+ {
+ 	jas_stream_fileobj_t *fileobj;
+@@ -1326,6 +1340,7 @@ static int file_write(jas_stream_obj_t *obj, char *buf, int cnt)
+ 	return write(fileobj->fd, buf, cnt);
+ }
+ 
++/* FIXME integral type */
+ static long file_seek(jas_stream_obj_t *obj, long offset, int origin)
+ {
+ 	jas_stream_fileobj_t *fileobj;
+@@ -1352,6 +1367,7 @@ static int file_close(jas_stream_obj_t *obj)
+ * Stdio file stream object.
+ \******************************************************************************/
+ 
++/* FIXME integral type */
+ static int sfile_read(jas_stream_obj_t *obj, char *buf, int cnt)
+ {
+ 	FILE *fp;
+@@ -1367,6 +1383,7 @@ static int sfile_read(jas_stream_obj_t *obj, char *buf, int cnt)
+ 	return result;
+ }
+ 
++/* FIXME integral type */
+ static int sfile_write(jas_stream_obj_t *obj, char *buf, int cnt)
+ {
+ 	FILE *fp;
+@@ -1377,6 +1394,7 @@ static int sfile_write(jas_stream_obj_t *obj, char *buf, int cnt)
+ 	return (n != JAS_CAST(size_t, cnt)) ? (-1) : cnt;
+ }
+ 
++/* FIXME integral type */
+ static long sfile_seek(jas_stream_obj_t *obj, long offset, int origin)
+ {
+ 	FILE *fp;
+diff --git a/src/libjasper/jp2/jp2_cod.c b/src/libjasper/jp2/jp2_cod.c
+index 7f3608a..8d98a2c 100644
+--- a/src/libjasper/jp2/jp2_cod.c
++++ b/src/libjasper/jp2/jp2_cod.c
+@@ -183,15 +183,28 @@ jp2_boxinfo_t jp2_boxinfo_unk = {
+ * Box constructor.
+ \******************************************************************************/
+ 
+-jp2_box_t *jp2_box_create(int type)
++jp2_box_t *jp2_box_create0()
+ {
+ 	jp2_box_t *box;
+-	jp2_boxinfo_t *boxinfo;
+-
+ 	if (!(box = jas_malloc(sizeof(jp2_box_t)))) {
+ 		return 0;
+ 	}
+ 	memset(box, 0, sizeof(jp2_box_t));
++	box->type = 0;
++	box->len = 0;
++	// Mark the box data as never having been constructed
++	// so that we will not errantly attempt to destroy it later.
++	box->ops = &jp2_boxinfo_unk.ops;
++	return box;
++}
++
++jp2_box_t *jp2_box_create(int type)
++{
++	jp2_box_t *box;
++	jp2_boxinfo_t *boxinfo;
++	if (!(box = jp2_box_create0())) {
++		return 0;
++	}
+ 	box->type = type;
+ 	box->len = 0;
+ 	if (!(boxinfo = jp2_boxinfolookup(type))) {
+@@ -248,14 +261,9 @@ jp2_box_t *jp2_box_get(jas_stream_t *in)
+ 	box = 0;
+ 	tmpstream = 0;
+ 
+-	if (!(box = jas_malloc(sizeof(jp2_box_t)))) {
++	if (!(box = jp2_box_create0())) {
+ 		goto error;
+ 	}
+-
+-	// Mark the box data as never having been constructed
+-	// so that we will not errantly attempt to destroy it later.
+-	box->ops = &jp2_boxinfo_unk.ops;
+-
+ 	if (jp2_getuint32(in, &len) || jp2_getuint32(in, &box->type)) {
+ 		goto error;
+ 	}
+@@ -263,10 +271,12 @@ jp2_box_t *jp2_box_get(jas_stream_t *in)
+ 	box->info = boxinfo;
+ 	box->len = len;
+ 	JAS_DBGLOG(10, (
+-	  "preliminary processing of JP2 box: type=%c%s%c (0x%08x); length=%d\n",
++	  "preliminary processing of JP2 box: "
++	  "type=%c%s%c (0x%08x); length=%"PRIuFAST32"\n",
+ 	  '"', boxinfo->name, '"', box->type, box->len
+ 	  ));
+ 	if (box->len == 1) {
++		JAS_DBGLOG(10, ("big length\n"));
+ 		if (jp2_getuint64(in, &extlen)) {
+ 			goto error;
+ 		}
+@@ -382,6 +392,7 @@ static int jp2_bpcc_getdata(jp2_box_t *box, jas_stream_t *in)
+ {
+ 	jp2_bpcc_t *bpcc = &box->data.bpcc;
+ 	unsigned int i;
++	bpcc->bpcs = 0;
+ 	bpcc->numcmpts = box->datalen;
+ 	if (!(bpcc->bpcs = jas_alloc2(bpcc->numcmpts, sizeof(uint_fast8_t)))) {
+ 		return -1;
+@@ -462,6 +473,7 @@ static int jp2_cdef_getdata(jp2_box_t *box, jas_stream_t *in)
+ 	jp2_cdef_t *cdef = &box->data.cdef;
+ 	jp2_cdefchan_t *chan;
+ 	unsigned int channo;
++	cdef->ents = 0;
+ 	if (jp2_getuint16(in, &cdef->numchans)) {
+ 		return -1;
+ 	}
+@@ -518,7 +530,9 @@ int jp2_box_put(jp2_box_t *box, jas_stream_t *out)
+ 	}
+ 
+ 	if (dataflag) {
+-		if (jas_stream_copy(out, tmpstream, box->len - JP2_BOX_HDRLEN(false))) {
++		if (jas_stream_copy(out, tmpstream, box->len -
++		  JP2_BOX_HDRLEN(false))) {
++			jas_eprintf("cannot copy box data\n");
+ 			goto error;
+ 		}
+ 		jas_stream_close(tmpstream);
+@@ -777,6 +791,7 @@ static int jp2_cmap_getdata(jp2_box_t *box, jas_stream_t *in)
+ 	jp2_cmap_t *cmap = &box->data.cmap;
+ 	jp2_cmapent_t *ent;
+ 	unsigned int i;
++	cmap->ents = 0;
+ 
+ 	cmap->numchans = (box->datalen) / 4;
+ 	if (!(cmap->ents = jas_alloc2(cmap->numchans, sizeof(jp2_cmapent_t)))) {
+@@ -835,6 +850,7 @@ static int jp2_pclr_getdata(jp2_box_t *box, jas_stream_t *in)
+ 	int_fast32_t x;
+ 
+ 	pclr->lutdata = 0;
++	pclr->bpc = 0;
+ 
+ 	if (jp2_getuint16(in, &pclr->numlutents) ||
+ 	  jp2_getuint8(in, &pclr->numchans)) {
+@@ -869,9 +885,9 @@ static int jp2_pclr_putdata(jp2_box_t *box, jas_stream_t *out)
+ #if 0
+ 	jp2_pclr_t *pclr = &box->data.pclr;
+ #endif
+-/* Eliminate warning about unused variable. */
+-box = 0;
+-out = 0;
++	/* Eliminate warning about unused variable. */
++	box = 0;
++	out = 0;
+ 	return -1;
+ }
+ 
+-- 
+2.11.0
+