CRED: Pass credentials through dentry_open()

Pass credentials through dentry_open() so that the COW creds patch can have
SELinux's flush_unauthorized_files() pass the appropriate creds back to itself
when it opens its null chardev.

The security_dentry_open() call also now takes a creds pointer, as does the
dentry_open hook in struct security_operations.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 2b3d1828db9..795e2c130ad 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -426,6 +426,7 @@ static int file_mode(int fmode)
 
 static int hppfs_open(struct inode *inode, struct file *file)
 {
+        const struct cred *cred = current_cred();
         struct hppfs_private *data;
         struct vfsmount *proc_mnt;
         struct dentry *proc_dentry;
@@ -446,7 +447,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
 
         /* XXX This isn't closed anywhere */
         data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                      file_mode(file->f_mode));
+                                      file_mode(file->f_mode), cred);
         err = PTR_ERR(data->proc_file);
         if (IS_ERR(data->proc_file))
                 goto out_free1;
@@ -489,6 +490,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
 
 static int hppfs_dir_open(struct inode *inode, struct file *file)
 {
+        const struct cred *cred = current_cred();
         struct hppfs_private *data;
         struct vfsmount *proc_mnt;
         struct dentry *proc_dentry;
@@ -502,7 +504,7 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
         proc_dentry = HPPFS_I(inode)->proc_dentry;
         proc_mnt = inode->i_sb->s_fs_info;
         data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                      file_mode(file->f_mode));
+                                      file_mode(file->f_mode), cred);
         err = PTR_ERR(data->proc_file);
         if (IS_ERR(data->proc_file))
                 goto out_free;