From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 4/9] avformat/cafdec: Check that nb_frasmes fits within 64bit
Date: Sat, 17 Sep 2022 23:15:52 +0200
Message-ID: <20220917211557.11547-4-michael@niedermayer.cc> (raw)
In-Reply-To: <20220917211557.11547-1-michael@niedermayer.cc>
Fixes: signed integer overflow: 1099511693312 * 538976288 cannot be represented in type 'long'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_CAF_fuzzer-6565048815845376
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/cafdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index d5b8c38c25c..e0a9031cb80 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -387,7 +387,7 @@ static int read_header(AVFormatContext *s)
found_data:
if (caf->bytes_per_packet > 0 && caf->frames_per_packet > 0) {
- if (caf->data_size > 0)
+ if (caf->data_size > 0 && caf->data_size / caf->bytes_per_packet < INT64_MAX / caf->frames_per_packet)
st->nb_frames = (caf->data_size / caf->bytes_per_packet) * caf->frames_per_packet;
} else if (ffstream(st)->nb_index_entries && st->duration > 0) {
if (st->codecpar->sample_rate && caf->data_size / st->duration > INT64_MAX / st->codecpar->sample_rate / 8) {
--
2.17.1
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next prev parent reply other threads:[~2022-09-17 21:16 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-17 21:15 [FFmpeg-devel] [PATCH 1/9] avformat/ape: Check frames size Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 2/9] avformat/apm: Use 64bit for bit_rate computation Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 3/9] avformat/asfdec_o: Limit packet offset Michael Niedermayer
2022-09-17 21:15 ` Michael Niedermayer [this message]
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 5/9] avformat/dhav: Use 64bit seek_back Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 6/9] avformat/dxa: avoid bpc overflows Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 7/9] avformat/genh: Check nb_channels for IMA ADPCM Michael Niedermayer
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 8/9] avformat/icodec: Check nb_pal Michael Niedermayer
2022-09-17 23:11 ` Peter Ross
2022-09-17 21:15 ` [FFmpeg-devel] [PATCH 9/9] avformat/jacosubdec: Fix overflow in get_shift() Michael Niedermayer
2022-09-23 21:03 ` [FFmpeg-devel] [PATCH 1/9] avformat/ape: Check frames size Michael Niedermayer
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