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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-17 23:15:56 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-10-28 21:04:04 +0200 |
| commit | 1ccd4a9eacdd9b78ba9d925e2502fbedeaa7d93c (patch) | |
| tree | ebb2101ca2ce5d62c977e7a4fe75cecd932b7b44 | |
| parent | 295c6a910d8b420a9472a7fef338143354447ace (diff) | |
| download | ffmpeg-1ccd4a9eacdd9b78ba9d925e2502fbedeaa7d93c.tar.gz | |
avformat/icodec: Check nb_pal
Fixes: signed integer overflow: 538976288 * 4 cannot be represented in type 'int'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_ICO_fuzzer-6690068904935424
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>
(cherry picked from commit db73ae0dc114aa6fae08e69f977944f056a24995)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/icodec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/icodec.c b/libavformat/icodec.c index 9320862b9b..ec58abe343 100644 --- a/libavformat/icodec.c +++ b/libavformat/icodec.c @@ -172,6 +172,9 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt) AV_WL32(buf + 32, image->nb_pal); } + if (image->nb_pal > INT_MAX / 4 - 14 - 40) + return AVERROR_INVALIDDATA; + AV_WL32(buf - 4, 14 + 40 + image->nb_pal * 4); AV_WL32(buf + 8, AV_RL32(buf + 8) / 2); } |