Fix CVE-2011-4516 and CVE-2011-4517 (heap buffer overflow flaws lead to
arbitrary code execution).

Copied from Fedora.

http://pkgs.fedoraproject.org/cgit/rpms/jasper.git/tree/jasper-1.900.1-CVE-2011-4516-CVE-2011-4517-CERT-VU-887409.patch
https://bugzilla.redhat.com/show_bug.cgi?id=747726

diff -up jasper-1.900.1/src/libjasper/jpc/jpc_cs.c.CERT-VU-887409 jasper-1.900.1/src/libjasper/jpc/jpc_cs.c
--- jasper-1.900.1/src/libjasper/jpc/jpc_cs.c.CERT-VU-887409	2011-10-25 17:25:39.000000000 +0200
+++ jasper-1.900.1/src/libjasper/jpc/jpc_cs.c	2011-10-25 17:29:14.379371908 +0200
@@ -744,6 +744,10 @@ static int jpc_cox_getcompparms(jpc_ms_t
 		return -1;
 	}
 	compparms->numrlvls = compparms->numdlvls + 1;
+	if (compparms->numrlvls > JPC_MAXRLVLS) {
+		jpc_cox_destroycompparms(compparms);
+		return -1;
+	}
 	if (prtflag) {
 		for (i = 0; i < compparms->numrlvls; ++i) {
 			if (jpc_getuint8(in, &tmp)) {
@@ -1331,7 +1335,7 @@ static int jpc_crg_getparms(jpc_ms_t *ms
 	jpc_crgcomp_t *comp;
 	uint_fast16_t compno;
 	crg->numcomps = cstate->numcomps;
-	if (!(crg->comps = jas_alloc2(cstate->numcomps, sizeof(uint_fast16_t)))) {
+	if (!(crg->comps = jas_alloc2(cstate->numcomps, sizeof(jpc_crgcomp_t)))) {
 		return -1;
 	}
 	for (compno = 0, comp = crg->comps; compno < cstate->numcomps;