[PATCH 02/28] ima: Align ima_post_path_mknod() definition with LSM infrastructure

[Stefan Berger]

On 3/3/23 13:18, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu at huawei.com>
> 
> Change ima_post_path_mknod() definition, so that it can be registered as
> implementation of the path_post_mknod hook.
> 
> Also, make sure that ima_post_path_mknod() is executed only if
> (mode & S_IFMT) is equal to zero or S_IFREG.
> 
> Add this check to take into account the different placement of the
> path_post_mknod hook (to be introduced) in do_mknodat(). Since the new hook
> will be placed after the switch(), the check ensures that
> ima_post_path_mknod() is invoked as originally intended when it is
> registered as implementation of path_post_mknod.

                 case 0: case S_IFREG:    <---- this here
                         error = vfs_create(mnt_userns, path.dentry->d_inode,
                                            dentry, mode, true);
                         if (!error)
                                 ima_post_path_mknod(mnt_userns, dentry);

> 
> Signed-off-by: Roberto Sassu <roberto.sassu at huawei.com>

Reviewed-by: Stefan Berger <stefanb at linux.ibm.com>