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1diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c
2index 8e35b33ee..d95963a5c 100644
3--- a/third_party/libopenjpeg20/j2k.c
4+++ b/third_party/libopenjpeg20/j2k.c
5@@ -9527,6 +9527,10 @@ static OPJ_BOOL opj_j2k_read_SPCod_SPCoc(opj_j2k_t *p_j2k,
6             p_j2k->m_specific_param.m_decoder.m_default_tcp;
7
8     /* precondition again */
9+    if (compno >= p_j2k->m_private_image->numcomps) {
10+        return OPJ_FALSE;
11+    }
12+
13     assert(compno < p_j2k->m_private_image->numcomps);
14
15     l_tccp = &l_tcp->tccps[compno];
16