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authorDaniel Jurgens <danielj@mellanox.com>2017-05-19 14:48:53 +0200
committerPaul Moore <paul@paul-moore.com>2017-05-23 18:27:11 +0200
commit8f408ab64be6319cb7736cbc6982838dcc362306 (patch)
treefa7169e96ad81ac38d6d78ac03668196dde902c4 /security/selinux
parentIB/core: Enforce PKey security on QPs (diff)
downloadlinux-8f408ab64be6319cb7736cbc6982838dcc362306.tar.xz
linux-8f408ab64be6319cb7736cbc6982838dcc362306.zip
selinux lsm IB/core: Implement LSM notification system
Add a generic notificaiton mechanism in the LSM. Interested consumers can register a callback with the LSM and security modules can produce events. Because access to Infiniband QPs are enforced in the setup phase of a connection security should be enforced again if the policy changes. Register infiniband devices for policy change notification and check all QPs on that device when the notification is received. Add a call to the notification mechanism from SELinux when the AVC cache changes or setenforce is cleared. Signed-off-by: Daniel Jurgens <danielj@mellanox.com> Acked-by: James Morris <james.l.morris@oracle.com> Acked-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/hooks.c11
-rw-r--r--security/selinux/selinuxfs.c2
2 files changed, 13 insertions, 0 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index cfb7ce339adc..b005acbcc6e9 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -171,6 +171,14 @@ static int selinux_netcache_avc_callback(u32 event)
return 0;
}
+static int selinux_lsm_notifier_avc_callback(u32 event)
+{
+ if (event == AVC_CALLBACK_RESET)
+ call_lsm_notifier(LSM_POLICY_CHANGE, NULL);
+
+ return 0;
+}
+
/*
* initialise the security for the init task
*/
@@ -6387,6 +6395,9 @@ static __init int selinux_init(void)
if (avc_add_callback(selinux_netcache_avc_callback, AVC_CALLBACK_RESET))
panic("SELinux: Unable to register AVC netcache callback\n");
+ if (avc_add_callback(selinux_lsm_notifier_avc_callback, AVC_CALLBACK_RESET))
+ panic("SELinux: Unable to register AVC LSM notifier callback\n");
+
if (selinux_enforcing)
printk(KERN_DEBUG "SELinux: Starting in enforcing mode\n");
else
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 82adb78a58f7..9010a3632d6f 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -154,6 +154,8 @@ static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
avc_ss_reset(0);
selnl_notify_setenforce(selinux_enforcing);
selinux_status_update_setenforce(selinux_enforcing);
+ if (!selinux_enforcing)
+ call_lsm_notifier(LSM_POLICY_CHANGE, NULL);
}
length = count;
out: