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lavc: check channel count after decoder init

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Ensures the decoder did not set channel count to an insanely high value
during initialization, which could cause large memory usage when it tries to
get a buffer during decoding.
This commit is contained in:
Justin Ruggles 2012-10-23 00:56:00 -04:00
parent bb6941af2a
commit 0366664ef9
1 changed files with 5 additions and 0 deletions
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5
libavcodec/utils.c
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@ -881,6 +881,11 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *code
avctx->channel_layout = 0;
}
}
if (avctx->channels && avctx->channels < 0 ||
avctx->channels > FF_SANE_NB_CHANNELS) {
ret = AVERROR(EINVAL);
goto free_and_end;
}
}
end:
entangled_thread_counter--;