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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-09-26 21:58:37 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:37:21 +0200 |
| commit | 8bcad00e41869840aaf55dc52cff252671dbb8c0 (patch) | |
| tree | 4c70f5d0191f5fa04d28aecf7a8b5c28bf9bd747 | |
| parent | f2025f4ed7551ad2692754d16594137abb370270 (diff) | |
| download | ffmpeg-8bcad00e41869840aaf55dc52cff252671dbb8c0.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 e35e4bfd7e..6e896d9760 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1771,7 +1771,7 @@ 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; // check offset table and recreate it if need |