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avcodec/ac3_parser: Check init_get_bits8() for failure
Fixes: null pointer dereference Fixes: ffmpeg_crash_6.avi Found-by: Thuan Pham, Marcel Böhme, Andrew Santosa and Alexandru Razvan Caciulescu with AFLSmart Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -162,7 +162,9 @@ int avpriv_ac3_parse_header(AC3HeaderInfo **phdr, const uint8_t *buf,
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return AVERROR(ENOMEM);
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hdr = *phdr;
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init_get_bits8(&gb, buf, size);
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err = init_get_bits8(&gb, buf, size);
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if (err < 0)
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return AVERROR_INVALIDDATA;
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err = ff_ac3_parse_header(&gb, hdr);
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if (err < 0)
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return AVERROR_INVALIDDATA;
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