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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-11 22:17:43 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-02 19:55:09 +0200 |
| commit | 68ecaacbac77c2fe80f5bebfa11445f982fe7492 (patch) | |
| tree | 7fd32853d045471fd9b531bac8783e8d18f65445 | |
| parent | 9aaf2c77dbd245b6796c54100e13f59dcf625a7c (diff) | |
| download | ffmpeg-68ecaacbac77c2fe80f5bebfa11445f982fe7492.tar.gz | |
avcodec/ralf: Check num_blocks before use
Fixes: out of array access
Fixes: 20659/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RALF_fuzzer-5739471895265280
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 f0c0471075fe52ed31c46e038df4280aef5b67a1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/ralf.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/ralf.c b/libavcodec/ralf.c index a57966a298..406326779a 100644 --- a/libavcodec/ralf.c +++ b/libavcodec/ralf.c @@ -482,6 +482,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, init_get_bits(&gb, src + 2, table_size); ctx->num_blocks = 0; while (get_bits_left(&gb) > 0) { + if (ctx->num_blocks >= FF_ARRAY_ELEMS(ctx->block_size)) + return AVERROR_INVALIDDATA; ctx->block_size[ctx->num_blocks] = get_bits(&gb, 13 + avctx->channels); if (get_bits1(&gb)) { ctx->block_pts[ctx->num_blocks] = get_bits(&gb, 9); |