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-rw-r--r--libavformat/wtvdec.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c
index 537dc8e..a2a26c2 100644
--- a/libavformat/wtvdec.c
+++ b/libavformat/wtvdec.c
@@ -258,7 +258,7 @@ static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int b
dir_length = AV_RL16(buf + 16);
file_length = AV_RL64(buf + 24);
name_size = 2 * AV_RL32(buf + 32);
- if (buf + 48 + name_size > buf_end) {
+ if (buf + 48 + (int64_t)name_size > buf_end || name_size<0) {
av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
break;
}
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