The number of channels is used as divisor in decode_frame, so it must
not be zero to avoid SIGFPE crashes.
Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com>
---
libavcodec/interplayacm.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavcodec/interplayacm.c b/libavcodec/interplayacm.c
index f4a3446..c897e72 100644
--- a/libavcodec/interplayacm.c
+++ b/libavcodec/interplayacm.c
@@ -62,6 +62,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
if (avctx->extradata_size < 14)
return AVERROR_INVALIDDATA;
+ if (avctx->channels <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid number of channels: %d\n",
avctx->channels);
+ return AVERROR_INVALIDDATA;
+ }
+
s->level = AV_RL16(avctx->extradata + 12) & 0xf;
s->rows = AV_RL16(avctx->extradata + 12) >> 4;
s->cols = 1 << s->level;
--
2.10.1
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