summaryrefslogtreecommitdiff
path: root/security/keys/keyctl.c
diff options
context:
space:
mode:
Diffstat (limited to 'security/keys/keyctl.c')
-rw-r--r--security/keys/keyctl.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 0a4a21d73f6a..fb767c6cd99f 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -389,11 +389,24 @@ long keyctl_keyring_clear(key_serial_t ringid)
keyring_ref = lookup_user_key(ringid, KEY_LOOKUP_CREATE, KEY_WRITE);
if (IS_ERR(keyring_ref)) {
ret = PTR_ERR(keyring_ref);
+
+ /* Root is permitted to invalidate certain special keyrings */
+ if (capable(CAP_SYS_ADMIN)) {
+ keyring_ref = lookup_user_key(ringid, 0, 0);
+ if (IS_ERR(keyring_ref))
+ goto error;
+ if (test_bit(KEY_FLAG_ROOT_CAN_CLEAR,
+ &key_ref_to_ptr(keyring_ref)->flags))
+ goto clear;
+ goto error_put;
+ }
+
goto error;
}
+clear:
ret = keyring_clear(key_ref_to_ptr(keyring_ref));
-
+error_put:
key_ref_put(keyring_ref);
error:
return ret;