selinux: move policy mutex to selinux_state, use in lockdep checks

Move the mutex used to synchronize policy changes (reloads and setting
of booleans) from selinux_fs_info to selinux_state and use it in
lockdep checks for rcu_dereference_protected() calls in the security
server functions.  This makes the dependency on the mutex explicit
in the code rather than relying on comments.

Signed-off-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 6f30ba1a38dc..6210e98219a5 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -7237,6 +7237,7 @@ static __init int selinux_init(void)
 	selinux_state.checkreqprot = selinux_checkreqprot_boot;
 	selinux_avc_init(&selinux_state.avc);
 	mutex_init(&selinux_state.status_lock);
+	mutex_init(&selinux_state.policy_mutex);
 
 	/* Set the security state for the initial task. */
 	cred_init_security();