UBUNTU: SAUCE: apparmor4.0.0 [87/90]: fixup notify

BugLink: http://bugs.launchpad.net/bugs/2028253
(cherry picked from commit fb00e41adbe0c5c0e0f2bcaaf2949fec00b2a941
https://git.launchpad.net/~apparmor-dev/ubuntu-kernel-next)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

security/apparmor/notify.c

@@ -971,10 +971,10 @@ static long build_v3_unotif(struct aa_knotif *knotif, void __user *buf,
 	pos = buf + sizeof(unotif);
 	if (!build_append_str(buf, pos, max_size, profile->base.hname,
 			      unotif.op.label, size))
-		return size;
+		return -EMSGSIZE;
 	if (!build_append_str(buf, pos, max_size, knotif->ad->name,
 			      unotif.file.name, size))
-		return size;
+		return -EMSGSIZE;
 
 	/* set size after appending strings */
 	unotif.common.len = size;