From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/2] avformat/mvdec: Use 64 bit in timestamp computation
Date: Wed, 15 Dec 2021 18:37:13 +0100
Message-ID: <20211215173713.7047-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20211215173713.7047-1-michael@niedermayer.cc>
Fixes: division by zero
Fixes: 42198/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-5054366405492736.fuzz
Fixes: 42222/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-4561249331970048
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/mvdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c
index 8b54a9ab045..5d184f20a49 100644
--- a/libavformat/mvdec.c
+++ b/libavformat/mvdec.c
@@ -381,7 +381,7 @@ static int mv_read_header(AVFormatContext *avctx)
avio_skip(pb, 8);
av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME);
av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME);
- timestamp += asize / (ast->codecpar->channels * bytes_per_sample);
+ timestamp += asize / (ast->codecpar->channels * (uint64_t)bytes_per_sample);
}
} else if (!version && avio_rb16(pb) == 3) {
avio_skip(pb, 4);
--
2.17.1
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
next prev parent reply other threads:[~2021-12-15 17:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-15 17:37 [FFmpeg-devel] [PATCH 1/2] tools/target_dec_fuzzer: Adjust threshold for prores Michael Niedermayer
2021-12-15 17:37 ` Michael Niedermayer [this message]
2021-12-16 0:26 ` [FFmpeg-devel] [PATCH 2/2] avformat/mvdec: Use 64 bit in timestamp computation Peter Ross
2021-12-16 20:03 ` Michael Niedermayer
2021-12-16 20:04 ` [FFmpeg-devel] [PATCH 1/2] tools/target_dec_fuzzer: Adjust threshold for prores Michael Niedermayer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211215173713.7047-2-michael@niedermayer.cc \
--to=michael@niedermayer.cc \
--cc=ffmpeg-devel@ffmpeg.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Git Inbox Mirror of the ffmpeg-devel mailing list - see https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
This inbox may be cloned and mirrored by anyone:
git clone --mirror https://master.gitmailbox.com/ffmpegdev/0 ffmpegdev/git/0.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 ffmpegdev ffmpegdev/ https://master.gitmailbox.com/ffmpegdev \
ffmpegdev@gitmailbox.com
public-inbox-index ffmpegdev
Example config snippet for mirrors.
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git