nvme-auth: uninitialized variable in nvme_auth_transform_key()

A couple of the early error gotos call kfree_sensitive(transformed_key);
before "transformed_key" has been initialized.

Fixes: db1312dd9548 ("nvmet: implement basic In-Band Authentication")
Signed-off-by: Dan Carpenter <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Signed-off-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/nvme/common/auth.c

···
 	shash->tfm = key_tfm;
 	ret = crypto_shash_setkey(key_tfm, key->key, key->len);
 	if (ret < 0)
-		goto out_free_shash;
+		goto out_free_transformed_key;
 	ret = crypto_shash_init(shash);
 	if (ret < 0)
-		goto out_free_shash;
+		goto out_free_transformed_key;
 	ret = crypto_shash_update(shash, nqn, strlen(nqn));
 	if (ret < 0)
-		goto out_free_shash;
+		goto out_free_transformed_key;
 	ret = crypto_shash_update(shash, "NVMe-over-Fabrics", 17);
 	if (ret < 0)
-		goto out_free_shash;
+		goto out_free_transformed_key;
 	ret = crypto_shash_final(shash, transformed_key);
+	if (ret < 0)
+		goto out_free_transformed_key;
+
+	kfree(shash);
+	crypto_free_shash(key_tfm);
+
+	return transformed_key;
+
+out_free_transformed_key:
+	kfree_sensitive(transformed_key);
 out_free_shash:
 	kfree(shash);
 out_free_key:
 	crypto_free_shash(key_tfm);
-	if (ret < 0) {
-		kfree_sensitive(transformed_key);
-		return ERR_PTR(ret);
-	}
-	return transformed_key;
+
+	return ERR_PTR(ret);
 }
 EXPORT_SYMBOL_GPL(nvme_auth_transform_key);