Fixes: CID1604419 Overflowed constant
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavformat/hnm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavformat/hnm.c b/libavformat/hnm.c
index 42efaaa3e8b..425dadc5e31 100644
--- a/libavformat/hnm.c
+++ b/libavformat/hnm.c
@@ -114,6 +114,8 @@ static int hnm_read_packet(AVFormatContext *s, AVPacket
*pkt)
if (hnm->superchunk_remaining == 0) {
/* parse next superchunk */
superchunk_size = avio_rl24(pb);
+ if (superchunk_size < 4)
+ return AVERROR_INVALIDDATA;
avio_skip(pb, 1);
hnm->superchunk_remaining = superchunk_size - 4;
@@ -124,7 +126,7 @@ static int hnm_read_packet(AVFormatContext *s, AVPacket
*pkt)
chunk_id = avio_rl16(pb);
avio_skip(pb, 2);
- if (chunk_size > hnm->superchunk_remaining || !chunk_size) {
+ if (chunk_size > hnm->superchunk_remaining || chunk_size < 8) {
av_log(s, AV_LOG_ERROR,
"invalid chunk size: %"PRIu32", offset: %"PRId64"\n",
chunk_size, avio_tell(pb));
--
2.45.2
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