Commit ce5481d0 authored by Stephan Mueller's avatar Stephan Mueller Committed by Herbert Xu

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: default avatarStephan Mueller <>
Signed-off-by: default avatarHerbert Xu <>
parent 63917232
......@@ -1500,7 +1500,7 @@ static int drbg_generate_long(struct drbg_state *drbg,
if (0 >= tmplen)
return tmplen;
len += tmplen;
} while (slice > 0);
} while (slice > 0 && (len < buflen));
return len;
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