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-rw-r--r--libavcodec/truemotion1.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/truemotion1.c b/libavcodec/truemotion1.c
index bcfe473852..b6481cbd7c 100644
--- a/libavcodec/truemotion1.c
+++ b/libavcodec/truemotion1.c
@@ -444,6 +444,8 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
if (s->flags & FLAG_KEYFRAME) {
/* no change bits specified for a keyframe; only index bytes */
s->index_stream = s->mb_change_bits;
+ if (s->avctx->width * s->avctx->height / 2048 + header.header_size > s->size)
+ return AVERROR_INVALIDDATA;
} else {
/* one change bit per 4x4 block */
s->index_stream = s->mb_change_bits +