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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-02 19:26:51 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-11 20:18:47 +0100 |
| commit | 2f20bd7076e9fbbcca77991b925598a5d045032f (patch) | |
| tree | bb42b88fe53e9537f05b21218d4a0c7a4137ab67 | |
| parent | fe82ca8709aa633b948b8be2afd5a396c7cfbcde (diff) | |
| download | ffmpeg-2f20bd7076e9fbbcca77991b925598a5d045032f.tar.gz | |
avcodec/wmaprodec: Check if there is a stream
Fixes: null pointer dereference
Fixes: signed integer overflow: 512 * 2147483647 cannot be represented in type 'int'
Fixes: 17809/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XMA1_fuzzer-5634409947987968
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9b533de28eb19c660c75823ff2af2f8549c4095a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/wmaprodec.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c index 9439bfa771..7af53dd02c 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -1874,7 +1874,9 @@ static av_cold int xma_decode_init(AVCodecContext *avctx) } /* encoder supports up to 64 streams / 64*2 channels (would have to alloc arrays) */ - if (avctx->channels > XMA_MAX_CHANNELS || s->num_streams > XMA_MAX_STREAMS) { + if (avctx->channels > XMA_MAX_CHANNELS || s->num_streams > XMA_MAX_STREAMS || + s->num_streams <= 0 + ) { avpriv_request_sample(avctx, "More than %d channels in %d streams", XMA_MAX_CHANNELS, s->num_streams); return AVERROR_PATCHWELCOME; } |