3 files changed, 17 insertions, 6 deletions

diff --git a/security/commoncap.c b/security/commoncap.c
index 399bfdb9e2da..3976613db829 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -279,10 +279,10 @@ static int get_file_caps(struct linux_binprm *bprm)
         struct vfs_cap_data vcaps;
         struct inode *inode;
 
-        if (bprm->file->f_vfsmnt->mnt_flags & MNT_NOSUID) {
-                bprm_clear_caps(bprm);
+        bprm_clear_caps(bprm);
+
+        if (bprm->file->f_vfsmnt->mnt_flags & MNT_NOSUID)
                 return 0;
-        }
 
         dentry = dget(bprm->file->f_dentry);
         inode = dentry->d_inode;
diff --git a/security/security.c b/security/security.c
index 255b08559b2b..c0acfa7177e5 100644
--- a/security/security.c
+++ b/security/security.c
@@ -198,14 +198,23 @@ int security_settime(struct timespec *ts, struct timezone *tz)
 
 int security_vm_enough_memory(long pages)
 {
+        WARN_ON(current->mm == NULL);
         return security_ops->vm_enough_memory(current->mm, pages);
 }
 
 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 {
+        WARN_ON(mm == NULL);
         return security_ops->vm_enough_memory(mm, pages);
 }
 
+int security_vm_enough_memory_kern(long pages)
+{
+        /* If current->mm is a kernel thread then we will pass NULL,
+           for this specific case that is fine */
+        return security_ops->vm_enough_memory(current->mm, pages);
+}
+
 int security_bprm_alloc(struct linux_binprm *bprm)
 {
         return security_ops->bprm_alloc_security(bprm);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 3e3fde7c1d2b..f85597a4d733 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2126,14 +2126,16 @@ static inline void flush_unauthorized_files(struct files_struct *files)
         tty = get_current_tty();
         if (tty) {
                 file_list_lock();
-                file = list_entry(tty->tty_files.next, typeof(*file), f_u.fu_list);
-                if (file) {
+                if (!list_empty(&tty->tty_files)) {
+                        struct inode *inode;
+
                         /* Revalidate access to controlling tty.
                            Use inode_has_perm on the tty inode directly rather
                            than using file_has_perm, as this particular open
                            file may belong to another process and we are only
                            interested in the inode-based check here. */
-                        struct inode *inode = file->f_path.dentry->d_inode;
+                        file = list_first_entry(&tty->tty_files, struct file, f_u.fu_list);
+                        inode = file->f_path.dentry->d_inode;
                         if (inode_has_perm(current, inode,
                                            FILE__READ | FILE__WRITE, NULL)) {
                                 drop_tty = 1;