From 6daf5f3e1ec6eff03b7982889874a3de6617db8d Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Mon, 30 Nov 2020 22:37:07 +0100
Subject: [PATCH] Encoder: avoid global buffer overflow on irreversible
 conversion when too many decomposition levels are specified (fixes #1286)

reason:CVE-2020-27824
Conflict:NA
Reference:https://github.com/uclouvain/openjpeg/commit/6daf5f3e1ec6eff03b7982889874a3de6617db8d

---
 src/lib/openjp2/dwt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/openjp2/dwt.c b/src/lib/openjp2/dwt.c
index ee9eb5e63..4164ba090 100644
--- a/src/lib/openjp2/dwt.c
+++ b/src/lib/openjp2/dwt.c
@@ -1976,7 +1976,7 @@ void opj_dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, OPJ_UINT32 prec)
         if (tccp->qntsty == J2K_CCP_QNTSTY_NOQNT) {
             stepsize = 1.0;
         } else {
-            OPJ_FLOAT64 norm = opj_dwt_norms_real[orient][level];
+            OPJ_FLOAT64 norm = opj_dwt_getnorm_real(level, orient);
             stepsize = (1 << (gain)) / norm;
         }
         opj_dwt_encode_stepsize((OPJ_INT32) floor(stepsize * 8192.0),
