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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-23 19:41:27 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-15 12:25:47 +0100 |
| commit | a76e4ba104badfe9e2e65916e90c2e41b15b5e04 (patch) | |
| tree | 26b1f093f822aeb913d441ed8dbc78da9cdfb67f | |
| parent | 25727befccd1a545f89772d75bca45bf12d43b95 (diff) | |
| download | ffmpeg-a76e4ba104badfe9e2e65916e90c2e41b15b5e04.tar.gz | |
avcodec/cook: Check samples_per_channel earlier
Fixes: division by zero
Fixes: 18362/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_COOK_fuzzer-5653727679086592
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 57750bb629a145326e20b8760f21f1041464a937)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/cook.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/libavcodec/cook.c b/libavcodec/cook.c index 53cb83852e..f8d401e6ae 100644 --- a/libavcodec/cook.c +++ b/libavcodec/cook.c @@ -1217,6 +1217,15 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) return AVERROR_PATCHWELCOME; } } + + /* Try to catch some obviously faulty streams, otherwise it might be exploitable */ + if (q->samples_per_channel != 256 && q->samples_per_channel != 512 && + q->samples_per_channel != 1024) { + avpriv_request_sample(avctx, "samples_per_channel = %d", + q->samples_per_channel); + return AVERROR_PATCHWELCOME; + } + /* Generate tables */ init_pow2table(); init_gain_table(q); @@ -1252,14 +1261,6 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) q->saturate_output = saturate_output_float; } - /* Try to catch some obviously faulty streams, otherwise it might be exploitable */ - if (q->samples_per_channel != 256 && q->samples_per_channel != 512 && - q->samples_per_channel != 1024) { - avpriv_request_sample(avctx, "samples_per_channel = %d", - q->samples_per_channel); - return AVERROR_PATCHWELCOME; - } - avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; if (channel_mask) avctx->channel_layout = channel_mask; |