tree 8fb6c47cd7e1c6d992e7df652c48a734f44b2c91
parent fd83bb554a4385000931722e6e7b3122b396085c
author David Howells <dhowells@redhat.com> 1445250028 +0100
committer Pritam <pritam.sutar@harman.com> 1579786327 +0530

KEYS: Don't permit request_key() to construct a new keyring

If request_key() is used to find a keyring, only do the search part - don't
do the construction part if the keyring was not found by the search.  We
don't really want keyrings in the negative instantiated state since the
rejected/negative instantiation error value in the payload is unioned with
keyring metadata.

Now the kernel gives an error:

	request_key("keyring", "#selinux,bdekeyring", "keyring", KEY_SPEC_USER_SESSION_KEYRING) = -1 EPERM (Operation not permitted)

Signed-off-by: David Howells <dhowells@redhat.com>
CVE-2015-7872
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>

Change-Id: I63ea0e9ec7a95a9f59c706efb0a934b835bc6448