From: Even Rouault <even.rouault@spatialys.com>
Date: Fri, 28 Jul 2017 19:39:30 +0000 (+0200)
Subject: Fix null pointer dereference in opj_j2k_add_mct() (#895)
X-Git-Tag: v2.2.0~44
X-Git-Url: https://main.carlh.net/gitweb/?a=commitdiff_plain;h=16aeb9282f6b3877aa8365c461ba8d3d1338adae;p=openjpeg.git

Fix null pointer dereference in opj_j2k_add_mct() (#895)

Fixes openjeg-crashes-2017-07-27/issue879-poc1.j2k of #895
---

diff --git a/src/lib/openjp2/j2k.c b/src/lib/openjp2/j2k.c
index 89f2b45f..b192f04f 100644
--- a/src/lib/openjp2/j2k.c
+++ b/src/lib/openjp2/j2k.c
@@ -5584,6 +5584,7 @@ static OPJ_BOOL opj_j2k_read_mct(opj_j2k_t *p_j2k,
     if (l_mct_data->m_data) {
         opj_free(l_mct_data->m_data);
         l_mct_data->m_data = 00;
+        l_mct_data->m_data_size = 0;
     }
 
     l_mct_data->m_index = l_indix;