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Commit 8acc67b3 authored by Herbert Xu's avatar Herbert Xu Committed by Sasha Levin
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crypto: gcm - Filter out async ghash if necessary 



[ Upstream commit b30bdfa86431afbafe15284a3ad5ac19b49b88e3 ]

As it is if you ask for a sync gcm you may actually end up with
an async one because it does not filter out async implementations
of ghash.

This patch fixes this by adding the necessary filter when looking
for ghash.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent c48db62d

crypto/gcm.c

+3 −1
Original line number Diff line number Diff line
@@ -716,7 +716,9 @@ static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb, 


	ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,

				    CRYPTO_ALG_TYPE_HASH,

				    CRYPTO_ALG_TYPE_AHASH_MASK);

				    CRYPTO_ALG_TYPE_AHASH_MASK |

				    crypto_requires_sync(algt->type,

							 algt->mask));

	if (IS_ERR(ghash_alg))

		return ERR_CAST(ghash_alg);