[FFmpeg-devel] [PATCH] lavc/movtextdec.c: Avoid infinite loop on invalid data.

[Sasi Inguva]

Signed-off-by: Sasi Inguva <isasi at google.com>
---
 libavcodec/movtextdec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/movtextdec.c b/libavcodec/movtextdec.c
index abf8711..a33fff7 100644
--- a/libavcodec/movtextdec.c
+++ b/libavcodec/movtextdec.c
@@ -471,6 +471,10 @@ static int mov_text_decode_frame(AVCodecContext *avctx,
             tsmb_type = AV_RB32(tsmb);
             tsmb += 4;
 
+            if (tsmb_size == 0) {
+              return AVERROR_INVALIDDATA;
+            }
+
             if (tsmb_size == 1) {
                 if (m->tracksize + 16 > avpkt->size)
                     break;
-- 
2.8.0.rc3.226.g39d4020