tiff: in add_string_metadata() check the count more completely
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -308,7 +308,7 @@ static int add_string_metadata(int count, const char *name,
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{
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char *value;
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if (bytestream2_get_bytes_left(&s->gb) < count)
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if (bytestream2_get_bytes_left(&s->gb) < count || count < 0)
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return AVERROR_INVALIDDATA;
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value = av_malloc(count + 1);
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