diff --git a/third_party/libopenjpeg20/t1.c b/third_party/libopenjpeg20/t1.c | |
index a119db1f7..1ad850c77 100644 | |
--- a/third_party/libopenjpeg20/t1.c | |
+++ b/third_party/libopenjpeg20/t1.c | |
@@ -1411,7 +1411,7 @@ static OPJ_BOOL opj_t1_decode_cblk(opj_t1_t *t1, | |
} | |
} | |
- for (passno = 0; passno < seg->real_num_passes; ++passno) { | |
+ for (passno = 0; (passno < seg->real_num_passes) && (bpno_plus_one >= 1); ++passno) { | |
switch (passtype) { | |
case 0: | |
if (type == T1_TYPE_RAW) { |