Merge tag 'selinux-pr-20190917' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull selinux updates from Paul Moore:

 - Add LSM hooks, and SELinux access control hooks, for dnotify,
   fanotify, and inotify watches. This has been discussed with both the
   LSM and fs/notify folks and everybody is good with these new hooks.

 - The LSM stacking changes missed a few calls to current_security() in
   the SELinux code; we fix those and remove current_security() for
   good.

 - Improve our network object labeling cache so that we always return
   the object's label, even when under memory pressure. Previously we
   would return an error if we couldn't allocate a new cache entry, now
   we always return the label even if we can't create a new cache entry
   for it.

 - Convert the sidtab atomic_t counter to a normal u32 with
   READ/WRITE_ONCE() and memory barrier protection.

 - A few patches to policydb.c to clean things up (remove forward
   declarations, long lines, bad variable names, etc)

* tag 'selinux-pr-20190917' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  lsm: remove current_security()
  selinux: fix residual uses of current_security() for the SELinux blob
  selinux: avoid atomic_t usage in sidtab
  fanotify, inotify, dnotify, security: add security hook for fs notifications
  selinux: always return a secid from the network caches if we find one
  selinux: policydb - rename type_val_to_struct_array
  selinux: policydb - fix some checkpatch.pl warnings
  selinux: shuffle around policydb.c to get rid of forward declarations

1 files changed, 12 insertions, 3 deletions

diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index c03758c91481..7a42c2ebe28d 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -13,6 +13,7 @@
 #include <linux/sched/signal.h>
 #include <linux/dnotify.h>
 #include <linux/init.h>
+#include <linux/security.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/fdtable.h>
@@ -279,6 +280,17 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
 		goto out_err;
 	}
 
+	/*
+	 * convert the userspace DN_* "arg" to the internal FS_*
+	 * defined in fsnotify
+	 */
+	mask = convert_arg(arg);
+
+	error = security_path_notify(&filp->f_path, mask,
+			FSNOTIFY_OBJ_TYPE_INODE);
+	if (error)
+		goto out_err;
+
 	/* expect most fcntl to add new rather than augment old */
 	dn = kmem_cache_alloc(dnotify_struct_cache, GFP_KERNEL);
 	if (!dn) {
@@ -293,9 +305,6 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
 		goto out_err;
 	}
 
-	/* convert the userspace DN_* "arg" to the internal FS_* defines in fsnotify */
-	mask = convert_arg(arg);
-
 	/* set up the new_fsn_mark and new_dn_mark */
 	new_fsn_mark = &new_dn_mark->fsn_mark;
 	fsnotify_init_mark(new_fsn_mark, dnotify_group);