diff options
| author | Pierre <pinaraf@pinaraf.info> | 2017-11-12 15:24:32 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-11-29 17:33:24 +1100 |
| commit | 4c0e22c90510308433272d7ba281b1eb4eda8209 (patch) | |
| tree | 4dc44a39b242540ee05c544b447d4365d745fc6c /crypto/ecc.c | |
| parent | f7daa71560ef384c282400e325fc0a6ae61a0bb7 (diff) | |
| download | lwn-4c0e22c90510308433272d7ba281b1eb4eda8209.tar.gz lwn-4c0e22c90510308433272d7ba281b1eb4eda8209.zip | |
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: Pierre Ducroquet <pinaraf@pinaraf.info>
Reviewed-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/ecc.c')
| -rw-r--r-- | crypto/ecc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/ecc.c b/crypto/ecc.c index 633a9bcdc574..18f32f2a5e1c 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -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(); |