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Fix CVE-2014-8138 (heap overflow in jp2_decode()).
Copied from Fedora.
http://pkgs.fedoraproject.org/cgit/rpms/jasper.git/tree/jasper-CVE-2014-8138.patch
https://bugzilla.redhat.com/show_bug.cgi?id=1173162
--- jasper-1.900.1.orig/src/libjasper/jp2/jp2_dec.c 2014-12-11 14:06:44.000000000 +0100
+++ jasper-1.900.1/src/libjasper/jp2/jp2_dec.c 2014-12-11 14:06:26.000000000 +0100
@@ -386,6 +386,11 @@ jas_image_t *jp2_decode(jas_stream_t *in
/* Determine the type of each component. */
if (dec->cdef) {
for (i = 0; i < dec->numchans; ++i) {
+ /* Is the channel number reasonable? */
+ if (dec->cdef->data.cdef.ents[i].channo >= dec->numchans) {
+ jas_eprintf("error: invalid channel number in CDEF box\n");
+ goto error;
+ }
jas_image_setcmpttype(dec->image,
dec->chantocmptlut[dec->cdef->data.cdef.ents[i].channo],
jp2_getct(jas_image_clrspc(dec->image),
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