From 2e069f6b69475683207ea05deb269f9c532633bb Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 19 Mar 2022 23:28:53 +0100 Subject: [PATCH] avformat/alp: Check num_channels Fixes: division by 0 Fixes: 45615/clusterfuzz-testcase-minimized-ffmpeg_dem_ALP_fuzzer-582660348405350 Fixes: 45625/clusterfuzz-testcase-minimized-ffmpeg_dem_ALP_fuzzer-4821437943250944 Fixes: 45839/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5857286998851584.fuzz Fixes: 45844/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6552705772945408 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/alp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/alp.c b/libavformat/alp.c index f2428a9e3b..40e4890a38 100644 --- a/libavformat/alp.c +++ b/libavformat/alp.c @@ -122,7 +122,7 @@ static int alp_read_header(AVFormatContext *s) par->format = AV_SAMPLE_FMT_S16; par->sample_rate = hdr->sample_rate; - if (hdr->num_channels > 2) + if (hdr->num_channels > 2 || hdr->num_channels == 0) return AVERROR_INVALIDDATA; av_channel_layout_default(&par->ch_layout, hdr->num_channels);