Merge tag 'v4.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next

Linux 4.17-rc2

1 files changed, 16 insertions, 18 deletions

diff --git a/crypto/api.c b/crypto/api.c
index 70a894e5..1d5290c6 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -193,17 +193,24 @@ static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg)
 	return alg;
 }
 
-struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask)
+static struct crypto_alg *crypto_alg_lookup(const char *name, u32 type,
+					    u32 mask)
 {
 	struct crypto_alg *alg;
+	u32 test = 0;
+
+	if (!((type | mask) & CRYPTO_ALG_TESTED))
+		test |= CRYPTO_ALG_TESTED;
 
 	down_read(&crypto_alg_sem);
-	alg = __crypto_alg_lookup(name, type, mask);
+	alg = __crypto_alg_lookup(name, type | test, mask | test);
+	if (!alg && test)
+		alg = __crypto_alg_lookup(name, type, mask) ?
+		      ERR_PTR(-ELIBBAD) : NULL;
 	up_read(&crypto_alg_sem);
 
 	return alg;
 }
-EXPORT_SYMBOL_GPL(crypto_alg_lookup);
 
 static struct crypto_alg *crypto_larval_lookup(const char *name, u32 type,
 					       u32 mask)
@@ -227,10 +234,12 @@ static struct crypto_alg *crypto_larval_lookup(const char *name, u32 type,
 		alg = crypto_alg_lookup(name, type, mask);
 	}
 
-	if (alg)
-		return crypto_is_larval(alg) ? crypto_larval_wait(alg) : alg;
+	if (!IS_ERR_OR_NULL(alg) && crypto_is_larval(alg))
+		alg = crypto_larval_wait(alg);
+	else if (!alg)
+		alg = crypto_larval_add(name, type, mask);
 
-	return crypto_larval_add(name, type, mask);
+	return alg;
 }
 
 int crypto_probing_notify(unsigned long val, void *v)
@@ -253,11 +262,6 @@ struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask)
 	struct crypto_alg *larval;
 	int ok;
 
-	if (!((type | mask) & CRYPTO_ALG_TESTED)) {
-		type |= CRYPTO_ALG_TESTED;
-		mask |= CRYPTO_ALG_TESTED;
-	}
-
 	/*
 	 * If the internal flag is set for a cipher, require a caller to
 	 * to invoke the cipher with the internal flag to use that cipher.
@@ -485,20 +489,14 @@ struct crypto_alg *crypto_find_alg(const char *alg_name,
 				   const struct crypto_type *frontend,
 				   u32 type, u32 mask)
 {
-	struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask) =
-		crypto_alg_mod_lookup;
-
 	if (frontend) {
 		type &= frontend->maskclear;
 		mask &= frontend->maskclear;
 		type |= frontend->type;
 		mask |= frontend->maskset;
-
-		if (frontend->lookup)
-			lookup = frontend->lookup;
 	}
 
-	return lookup(alg_name, type, mask);
+	return crypto_alg_mod_lookup(alg_name, type, mask);
 }
 EXPORT_SYMBOL_GPL(crypto_find_alg);