diff options
| author | David Howells <dhowells@redhat.com> | 2020-01-14 17:07:13 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2020-05-19 15:47:15 +0100 |
| commit | 3e412ccc22e25666772094fb5ca01af056c54471 (patch) | |
| tree | adf880d0ca933b12eef91835374adf0edaa9f8a0 | |
| parent | 8c0637e950d68933a67f7438f779d79b049b5e5c (diff) | |
selinux: Implement the watch_key security hook
Implement the watch_key security hook to make sure that a key grants the
caller View permission in order to set a watch on a key.
For the moment, the watch_devices security hook is left unimplemented as
it's not obvious what the object should be since the queue is global and
didn't previously exist.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
| -rw-r--r-- | security/selinux/hooks.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 196acaccbfdd..5b3191bd6130 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -6619,6 +6619,17 @@ static int selinux_key_getsecurity(struct key *key, char **_buffer) *_buffer = context; return rc; } + +#ifdef CONFIG_KEY_NOTIFICATIONS +static int selinux_watch_key(struct key *key) +{ + struct key_security_struct *ksec = key->security; + u32 sid = current_sid(); + + return avc_has_perm(&selinux_state, + sid, ksec->sid, SECCLASS_KEY, KEY__VIEW, NULL); +} +#endif #endif #ifdef CONFIG_SECURITY_INFINIBAND @@ -7134,6 +7145,9 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = { LSM_HOOK_INIT(key_free, selinux_key_free), LSM_HOOK_INIT(key_permission, selinux_key_permission), LSM_HOOK_INIT(key_getsecurity, selinux_key_getsecurity), +#ifdef CONFIG_KEY_NOTIFICATIONS + LSM_HOOK_INIT(watch_key, selinux_watch_key), +#endif #endif #ifdef CONFIG_AUDIT |