From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 4/5] avformat/iff: Check nb_channels == 0 in CHNL
Date: Sat, 21 Jun 2025 23:15:20 +0200
Message-ID: <20250621211521.895204-4-michael@niedermayer.cc> (raw)
In-Reply-To: <20250621211521.895204-1-michael@niedermayer.cc>
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
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/iff.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/iff.c b/libavformat/iff.c
index 9402be48c98..4ff10beb38a 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");
--
2.49.0
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next prev parent reply other threads:[~2025-06-21 21:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-21 21:15 [FFmpeg-devel] [PATCH 1/5] avformat/mov: Check that sample_count is allocated in mov_parse_heif_items() Michael Niedermayer
2025-06-21 21:15 ` [FFmpeg-devel] [PATCH 2/5] avformat/mov: Check edit_list_dts_entry_end Michael Niedermayer
2025-06-21 21:15 ` [FFmpeg-devel] [PATCH 3/5] avcodec/rv60dec: Check sum in read_slice_sizes() Michael Niedermayer
2025-06-21 21:15 ` Michael Niedermayer [this message]
2025-06-21 21:15 ` [FFmpeg-devel] [PATCH 5/5] avcodec/cbs_apv_syntax_template: Check tile_data_size Michael Niedermayer
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