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crypto: drbg - fix failure of generating multiple of 2**16 bytes
The function drbg_generate_long slices the request into 2**16 byte or smaller chunks. However, the loop, however invokes the random number generation function with zero bytes when the request size is a multiple of 2**16 bytes. The fix prevents zero bytes requests. Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -1500,7 +1500,7 @@ static int drbg_generate_long(struct drbg_state *drbg,
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if (0 >= tmplen)
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return tmplen;
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len += tmplen;
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} while (slice > 0);
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} while (slice > 0 && (len < buflen));
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return len;
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}
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