Problem with mnt_list

[Yan Wang <wy.micheal@xxxxxxxxx>]

I wrote a piece of code trying to print all the mount point in the system.

But the is a issue with this code, when install this module to kernel it premot a "Segmentation fault“. 

From my understanding the vfsmount->mnt_list should be a loop.

Anyone could help me on this issue?

I post my code here, hope someone could help me:

#include <linux/init.h>

#include <linux/module.h>

#include <asm/thread_info.h>

#include <linux/dcache.h>

#include <linux/sched.h>

#include <linux/list.h>

#include <linux/mount.h>

#include <linux/string.h>

#include <asm/current.h>

MODULE_LICENSE("Dual BSD/GPL");

int print_mntp_list(void);

static int __init hello_init(void) {

        printk(KERN_ALERT "Trying to print the mount point name list\n");

        print_mntp_list();

        return 0;

}

int print_mntp_list(void) {

        struct vfsmount *vfs_mount_p, *iterator;

        struct list_head * mnt_glist;

        iterator = vfs_mount_p = current -> fs -> root.mnt;

        do {

                printk(KERN_ALERT "Mount point name: %s\n", iterator->mnt_mountpoint->d_na\

me.name);

                iterator = container_of( iterator -> mnt_list.next, struct vfsmount, mnt_l\

ist );

        } while (strcmp(iterator->mnt_mountpoint->d_name.name, vfs_mount_p->mnt_mountpoint\

->d_name.name) != 0 );

        return 0;

}

static void __exit hello_exit(void) {

        printk(KERN_ALERT "Goodbye, cruel world\n");

}

module_init(hello_init);

module_exit(hello_exit);

Any help will be more than appreciate,

Thanks,

Wang Yan