diff options
Diffstat (limited to 'security/keys/keyctl.c')
| -rw-r--r-- | security/keys/keyctl.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index fb767c6cd99f..ddb3e05bc5fc 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -375,6 +375,37 @@ error: } /* + * Invalidate a key. + * + * The key must be grant the caller Invalidate permission for this to work. + * The key and any links to the key will be automatically garbage collected + * immediately. + * + * If successful, 0 is returned. + */ +long keyctl_invalidate_key(key_serial_t id) +{ + key_ref_t key_ref; + long ret; + + kenter("%d", id); + + key_ref = lookup_user_key(id, 0, KEY_SEARCH); + if (IS_ERR(key_ref)) { + ret = PTR_ERR(key_ref); + goto error; + } + + key_invalidate(key_ref_to_ptr(key_ref)); + ret = 0; + + key_ref_put(key_ref); +error: + kleave(" = %ld", ret); + return ret; +} + +/* * Clear the specified keyring, creating an empty process keyring if one of the * special keyring IDs is used. * @@ -1622,6 +1653,9 @@ SYSCALL_DEFINE5(keyctl, int, option, unsigned long, arg2, unsigned long, arg3, (unsigned) arg4, (key_serial_t) arg5); + case KEYCTL_INVALIDATE: + return keyctl_invalidate_key((key_serial_t) arg2); + default: return -EOPNOTSUPP; } |