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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-22 15:41:51 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-09 17:59:03 +0100 |
| commit | 97f778e9c55328e8b48f4b8b4171245e5f2232f6 (patch) | |
| tree | 55cd6e100e084491298367960141eac8b38c4c86 /libavcodec/twinvq.c | |
| parent | 50001cd440ac89ed125f0154dedbcfa2718d2d68 (diff) | |
| download | ffmpeg-97f778e9c55328e8b48f4b8b4171245e5f2232f6.tar.gz | |
avcodec/twinvq: Check block_align
Fixes: signed integer overflow: 538976288 * 8 cannot be represented in type 'int'
Fixes: 18348/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_METASOUND_fuzzer-6681325716635648
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/twinvq.c')
| -rw-r--r-- | libavcodec/twinvq.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/libavcodec/twinvq.c b/libavcodec/twinvq.c index 7b2e19e536..34ca1846b9 100644 --- a/libavcodec/twinvq.c +++ b/libavcodec/twinvq.c @@ -771,23 +771,26 @@ av_cold int ff_twinvq_decode_init(AVCodecContext *avctx) { int ret; TwinVQContext *tctx = avctx->priv_data; + int64_t frames_per_packet; tctx->avctx = avctx; avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; if (!avctx->block_align) { avctx->block_align = tctx->frame_size + 7 >> 3; - } else if (avctx->block_align * 8 < tctx->frame_size) { - av_log(avctx, AV_LOG_ERROR, "Block align is %d bits, expected %d\n", - avctx->block_align * 8, tctx->frame_size); + } + frames_per_packet = avctx->block_align * 8LL / tctx->frame_size; + if (frames_per_packet <= 0) { + av_log(avctx, AV_LOG_ERROR, "Block align is %"PRId64" bits, expected %d\n", + avctx->block_align * (int64_t)8, tctx->frame_size); return AVERROR_INVALIDDATA; } - tctx->frames_per_packet = avctx->block_align * 8 / tctx->frame_size; - if (tctx->frames_per_packet > TWINVQ_MAX_FRAMES_PER_PACKET) { - av_log(avctx, AV_LOG_ERROR, "Too many frames per packet (%d)\n", - tctx->frames_per_packet); + if (frames_per_packet > TWINVQ_MAX_FRAMES_PER_PACKET) { + av_log(avctx, AV_LOG_ERROR, "Too many frames per packet (%"PRId64")\n", + frames_per_packet); return AVERROR_INVALIDDATA; } + tctx->frames_per_packet = frames_per_packet; tctx->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT); if (!tctx->fdsp) { |