1 files changed, 27 insertions, 2 deletions

diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index e11ce37c7104..f6f08336df5d 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -14,6 +14,7 @@
  */
 
 #include <crypto/internal/skcipher.h>
+#include <linux/cpumask.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -25,6 +26,8 @@
 
 #include "internal.h"
 
+static const char *skcipher_default_geniv __read_mostly;
+
 static int setkey_unaligned(struct crypto_ablkcipher *tfm, const u8 *key,
                             unsigned int keylen)
 {
@@ -180,7 +183,14 @@ EXPORT_SYMBOL_GPL(crypto_givcipher_type);
 
 const char *crypto_default_geniv(const struct crypto_alg *alg)
 {
-        return alg->cra_flags & CRYPTO_ALG_ASYNC ? "eseqiv" : "chainiv";
+        if (((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+             CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
+                                         alg->cra_ablkcipher.ivsize) !=
+            alg->cra_blocksize)
+                return "chainiv";
+
+        return alg->cra_flags & CRYPTO_ALG_ASYNC ?
+               "eseqiv" : skcipher_default_geniv;
 }
 
 static int crypto_givcipher_default(struct crypto_alg *alg, u32 type, u32 mask)
@@ -201,8 +211,9 @@ static int crypto_givcipher_default(struct crypto_alg *alg, u32 type, u32 mask)
         int err;
 
         larval = crypto_larval_lookup(alg->cra_driver_name,
+                                      (type & ~CRYPTO_ALG_TYPE_MASK) |
                                       CRYPTO_ALG_TYPE_GIVCIPHER,
-                                      CRYPTO_ALG_TYPE_MASK);
+                                      mask | CRYPTO_ALG_TYPE_MASK);
         err = PTR_ERR(larval);
         if (IS_ERR(larval))
                 goto out;
@@ -360,3 +371,17 @@ err:
         return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_ablkcipher);
+
+static int __init skcipher_module_init(void)
+{
+        skcipher_default_geniv = num_possible_cpus() > 1 ?
+                                 "eseqiv" : "chainiv";
+        return 0;
+}
+
+static void skcipher_module_exit(void)
+{
+}
+
+module_init(skcipher_module_init);
+module_exit(skcipher_module_exit);