[Keyrings] [PATCH] Keys: Fix permissions check for update vs add

[David Howells]

The attached patch permits add_key() to once again update a matching key
rather than adding a new one if a matching key already exists in the target
keyring.

This bug causes add_key() to always add a new key, displacing the old from the
target keyring.

Signed-Off-By: David Howells <dhowells at redhat.com>
---
warthog>diffstat -p1 keys-permfix-2615rc1.diff 
 security/keys/keyring.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -uNr linux-2.6.15-rc1-keys-reqkey/security/keys/keyring.c linux-2.6.15-rc1-keys-permfix/security/keys/keyring.c
--- linux-2.6.15-rc1-keys-reqkey/security/keys/keyring.c	2005-11-16 17:55:47.000000000 +0000
+++ linux-2.6.15-rc1-keys-permfix/security/keys/keyring.c	2005-11-30 16:24:33.000000000 +0000
@@ -526,7 +526,7 @@
 			    (!key->type->match ||
 			     key->type->match(key, description)) &&
 			    key_permission(make_key_ref(key, possessed),
-					   perm) < 0 &&
+					   perm) == 0 &&
 			    !test_bit(KEY_FLAG_REVOKED, &key->flags)
 			    )
 				goto found;