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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-09-26 21:58:37 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:19 +0200 |
| commit | f4953bfde524619d312ffa94df940723f21361f2 (patch) | |
| tree | d9d2dc7a6f68e542f3c2777994f5819bd2f1f94c | |
| parent | 247115c0461260a611da820820cebcf4557c98e9 (diff) | |
| download | ffmpeg-f4953bfde524619d312ffa94df940723f21361f2.tar.gz | |
avcodec/exr: Fix overflow with many blocks
Fixes: signed integer overflow: 1073741827 * 8 cannot be represented in type 'int'
Fixes: 25621/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-6304841641754624
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7265b7d904f86ec1c681222310c739f92ba55e5e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/exr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 40c24f8adb..8665cac1c0 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1703,7 +1703,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) return ret; - if (bytestream2_get_bytes_left(&s->gb) < nb_blocks * 8) + if (bytestream2_get_bytes_left(&s->gb)/8 < nb_blocks) return AVERROR_INVALIDDATA; // save pointer we are going to use in decode_block |