[PATCH 3.10 108/139] KEYS: Fix an error code in request_master_key()

[Willy Tarreau]

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit 57cb17e764ba0aaa169d07796acce54ccfbc6cae upstream.

This function has two callers and neither are able to handle a NULL
return.  Really, -EINVAL is the correct thing return here anyway.  This
fixes some static checker warnings like:

	security/keys/encrypted-keys/encrypted.c:709 encrypted_key_decrypt()
	error: uninitialized symbol 'master_key'.

Fixes: 7e70cb497850 ("keys: add new key-type encrypted")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: James Morris <james.l.morris@xxxxxxxxxx>
Signed-off-by: Willy Tarreau <w@xxxxxx>
---
 security/keys/encrypted-keys/encrypted.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c
index 7bef30b..b7d7cff 100644
--- a/security/keys/encrypted-keys/encrypted.c
+++ b/security/keys/encrypted-keys/encrypted.c
@@ -435,7 +435,7 @@ static int init_blkcipher_desc(struct blkcipher_desc *desc, const u8 *key,
 static struct key *request_master_key(struct encrypted_key_payload *epayload,
 				      u8 **master_key, size_t *master_keylen)
 {
-	struct key *mkey = NULL;
+	struct key *mkey = ERR_PTR(-EINVAL);
 
 	if (!strncmp(epayload->master_desc, KEY_TRUSTED_PREFIX,
 		     KEY_TRUSTED_PREFIX_LEN)) {
-- 
2.8.0.rc2.1.gbe9624a