From: Tudor-Dan Ambarus <tudor.ambarus@microchip.com>
Date: Thu, 25 May 2017 07:18:13 +0000 (+0300)
Subject: crypto: rsa - comply with crypto_akcipher_maxsize()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1c23b466e999911d3dd7af2ac0ec7bee8cc85635;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

crypto: rsa - comply with crypto_akcipher_maxsize()

crypto_akcipher_maxsize() asks for the output buffer size without
caring for errors. It allways assume that will be called after
a valid setkey. Comply with it and return what he wants.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/crypto/rsa.c b/crypto/rsa.c
index 4c280b6a3ea9..b067f3a93880 100644
--- a/crypto/rsa.c
+++ b/crypto/rsa.c
@@ -337,11 +337,11 @@ err:
 	return -ENOMEM;
 }
 
-static int rsa_max_size(struct crypto_akcipher *tfm)
+static unsigned int rsa_max_size(struct crypto_akcipher *tfm)
 {
 	struct rsa_mpi_key *pkey = akcipher_tfm_ctx(tfm);
 
-	return pkey->n ? mpi_get_size(pkey->n) : -EINVAL;
+	return mpi_get_size(pkey->n);
 }
 
 static void rsa_exit_tfm(struct crypto_akcipher *tfm)