[FFmpeg-devel] [PATCH 4/6] ircamdec: prevent overflow during block alignment, calculation

[Andreas Cadhalpun]

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
---
 libavformat/ircamdec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/ircamdec.c b/libavformat/ircamdec.c
index 59f3a49..3efc2b4 100644
--- a/libavformat/ircamdec.c
+++ b/libavformat/ircamdec.c
@@ -96,6 +96,11 @@ static int ircam_read_header(AVFormatContext *s)
     }
 
     st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
+    if (st->codecpar->channels && st->codecpar->bits_per_coded_sample > INT_MAX / st->codecpar->channels) {
+        av_log(s, AV_LOG_ERROR, "Overflow during block alignment calculation %d * %d\n",
+               st->codecpar->bits_per_coded_sample, st->codecpar->channels);
+        return AVERROR_INVALIDDATA;
+    }
     st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
     avio_skip(s->pb, 1008);
-- 
2.10.2