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diff --git a/src/util.c b/src/util.c
index d8dc3c3..9422fc5 100644
--- a/src/util.c
+++ b/src/util.c
@@ -340,9 +340,14 @@ int64_t quicktime_byte_position(quicktime_t *file)
void quicktime_read_pascal(quicktime_t *file, char *data)
{
- char len = quicktime_read_char(file);
- quicktime_read_data(file, (uint8_t*)data, len);
- data[(int)len] = 0;
+ int len = quicktime_read_char(file);
+ if ((len > 0) && (len < 256)) {
+ /* data[] is expected to be 256 bytes long */
+ quicktime_read_data(file, (uint8_t*)data, len);
+ data[len] = 0;
+ } else {
+ data[0] = 0;
+ }
}
void quicktime_write_pascal(quicktime_t *file, char *data)
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