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avformat/xmv: Check this_packet_size

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Fixes: CID1604489 Overflowed constant

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 696685df0ccf437083d15f40358a6ec86f5748ac)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-07-11 22:37:54 +02:00
parent 5217c7bf7f
commit 6381da354b
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1 changed files with 2 additions and 0 deletions
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libavformat/xmv.c
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@ -219,6 +219,8 @@ static int xmv_read_header(AVFormatContext *s)
/* Initialize the packet context */ /* Initialize the packet context */
xmv->next_packet_offset = avio_tell(pb); xmv->next_packet_offset = avio_tell(pb);
if (this_packet_size < xmv->next_packet_offset)
return AVERROR_INVALIDDATA;
xmv->next_packet_size = this_packet_size - xmv->next_packet_offset; xmv->next_packet_size = this_packet_size - xmv->next_packet_offset;
xmv->stream_count = xmv->audio_track_count + 1; xmv->stream_count = xmv->audio_track_count + 1;