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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-17 23:15:56 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-11-03 23:29:49 +0100 |
| commit | 35d5d2a4b2b880fa114fcdd71963190d0d13e550 (patch) | |
| tree | da9c437989622c5523500c9c59030d114bade86c | |
| parent | 2a6e750c87c2b5b87817bf456735c74cf79b4694 (diff) | |
| download | ffmpeg-35d5d2a4b2b880fa114fcdd71963190d0d13e550.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 2e677c78f1..e533f70006 100644 --- a/libavformat/icodec.c +++ b/libavformat/icodec.c @@ -197,6 +197,9 @@ 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); } |