diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-18 00:15:56 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-24 23:58:18 +0300 |
| commit | c9bb4e3bcce44acbd4d9055130f0e7bee44246da (patch) | |
| tree | f9fc46a03f2abaa6faacae02266e8e967ee4e328 | |
| parent | 14787c60eca221deae7c7a8e3403cddd77152350 (diff) | |
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 290f658d0c..85dab3bca0 100644 --- a/libavformat/icodec.c +++ b/libavformat/icodec.c @@ -196,6 +196,9 @@ 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); } |