Since the number of channels is multiplied by 36 and assigned to
to a uint16_t, make sure this calculation didn't overflow. (In
certain cases the calculation could overflow leaving the
truncated block_align at 0, leading to divisions by zero later.)
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-sta...@libav.org
---
libavformat/xmv.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavformat/xmv.c b/libavformat/xmv.c
index bc7c3c9..dd8a02d 100644
--- a/libavformat/xmv.c
+++ b/libavformat/xmv.c
@@ -224,7 +224,8 @@ static int xmv_read_header(AVFormatContext *s)
av_log(s, AV_LOG_WARNING, "Unsupported 5.1 ADPCM audio stream "
"(0x%04X)\n", track->flags);
- if (!track->channels || !track->sample_rate) {
+ if (!track->channels || !track->sample_rate ||
+ track->channels >= UINT16_MAX/36) {
av_log(s, AV_LOG_ERROR, "Invalid parameters for audio track %d.\n",
audio_track);
ret = AVERROR_INVALIDDATA;
--
1.7.9.4
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