Because: 1. if use %s, you can only request cryptd(<driver name>), not cryptd(<alg name>), because generated new algorithm instance has algorithm name: <alg name> and driver name cryptd(<driver name>). 2. Generated cryptd-ed algorithm will have the same algorithm name and higher priority, but some user may not want to use cryptd-ed version. Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx> --- crypto/cryptd.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/crypto/cryptd.c +++ b/crypto/cryptd.c @@ -215,7 +215,9 @@ static struct crypto_instance *cryptd_al ctx->state = state; - memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME); + if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME, + "cryptd(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME) + goto out_free_inst; inst->alg.cra_priority = alg->cra_priority + 50; inst->alg.cra_blocksize = alg->cra_blocksize;
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