File openjpeg2-CVE-2020-27843.patch of Package openjpeg2
Index: openjpeg-2.3.0/src/lib/openjp2/t2.c
===================================================================
--- openjpeg-2.3.0.orig/src/lib/openjp2/t2.c
+++ openjpeg-2.3.0/src/lib/openjp2/t2.c
@@ -770,6 +770,15 @@ static OPJ_BOOL opj_t2_encode_packet(OPJ
continue;
}
+ /* Avoid out of bounds access of https://github.com/uclouvain/openjpeg/issues/1297 */
+ /* but likely not a proper fix. */
+ if (precno >= res->pw * res->ph) {
+ opj_event_msg(p_manager, EVT_ERROR,
+ "opj_t2_encode_packet(): accessing precno=%u >= %u\n",
+ precno, res->pw * res->ph);
+ return OPJ_FALSE;
+ }
+
prc = &band->precincts[precno];
l_nb_blocks = prc->cw * prc->ch;
cblk = prc->cblks.enc;