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| author | Michael Niedermayer <michael@niedermayer.cc> | 2025-06-21 02:01:22 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2025-06-23 16:31:58 +0200 |
| commit | 5b1301004bdade13e3fee22081459e339ddd2637 (patch) | |
| tree | 1a389eb814c30761e05511ab880b8e711c8e52c4 /libavformat/iff.c | |
| parent | f06474faf87bd7f4b2e46527d17439f3467cf423 (diff) | |
| download | ffmpeg-5b1301004bdade13e3fee22081459e339ddd2637.tar.gz | |
avformat/iff: Check nb_channels == 0 in CHNL
Fixes: division by 0
Fixes: 418396712/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-6104388018176000
Fixes: 418478219/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-4569544410857472
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat/iff.c')
| -rw-r--r-- | libavformat/iff.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/iff.c b/libavformat/iff.c index 9402be48c9..4ff10beb38 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -284,7 +284,7 @@ static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof) return AVERROR_INVALIDDATA; st->codecpar->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; st->codecpar->ch_layout.nb_channels = avio_rb16(pb); - if (size < 2 + st->codecpar->ch_layout.nb_channels * 4) + if (size < 2 + st->codecpar->ch_layout.nb_channels * 4 || !st->codecpar->ch_layout.nb_channels) return AVERROR_INVALIDDATA; if (st->codecpar->ch_layout.nb_channels > FF_ARRAY_ELEMS(dsd_layout)) { avpriv_request_sample(s, "channel layout"); |