SELinux: Fix possible NULL pointer dereference in selinux_inode_permission()

[firefly-linux-kernel-4.4.55.git] / security / selinux / include / objsec.h

diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index b1dfe104945078ead53647c247c46aa6134fac2e..078e553f52f27a03ab83490f20bb2353782d2ef2 100644 (file)
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -38,7 +38,10 @@ struct task_security_struct {
 
 struct inode_security_struct {
        struct inode *inode;    /* back pointer to inode object */
-       struct list_head list;  /* list of inode_security_struct */
+       union {
+               struct list_head list;  /* list of inode_security_struct */
+               struct rcu_head rcu;    /* for freeing the inode_security_struct */
+       };
        u32 task_sid;           /* SID of creating task */
        u32 sid;                /* SID of this object */
        u16 sclass;             /* security class of this object */