Commit 4c0e22c9 authored by Pierre's avatar Pierre Committed by Herbert Xu

crypto: ecc - Fix NULL pointer deref. on no default_rng

If crypto_get_default_rng returns an error, the
function ecc_gen_privkey should return an error.
Instead, it currently tries to use the default_rng
nevertheless, thus creating a kernel panic with a
NULL pointer dereference.
Returning the error directly, as was supposedly
intended when looking at the code, fixes this.
Signed-off-by: default avatarPierre Ducroquet <pinaraf@pinaraf.info>
Reviewed-by: default avatarPrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent f7daa715
......@@ -964,7 +964,7 @@ int ecc_gen_privkey(unsigned int curve_id, unsigned int ndigits, u64 *privkey)
* DRBG with a security strength of 256.
*/
if (crypto_get_default_rng())
err = -EFAULT;
return -EFAULT;
err = crypto_rng_get_bytes(crypto_default_rng, (u8 *)priv, nbytes);
crypto_put_default_rng();
......
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