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-rw-r--r--fs/namespace.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 6fbc9126367a..f0d664adb9ba 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -29,6 +29,7 @@
#include <linux/sched/task.h>
#include <uapi/linux/mount.h>
#include <linux/fs_context.h>
+#include <linux/shmem_fs.h>
#include "pnode.h"
#include "internal.h"
@@ -2788,6 +2789,8 @@ static int do_new_mount(struct path *path, const char *fstype, int sb_flags,
err = vfs_parse_fs_string(fc, "source", name, strlen(name));
if (!err)
err = parse_monolithic_mount_data(fc, data);
+ if (!err && !mount_capable(fc))
+ err = -EPERM;
if (!err)
err = vfs_get_tree(fc);
if (!err)
@@ -3295,8 +3298,8 @@ struct dentry *mount_subtree(struct vfsmount *m, const char *name)
}
EXPORT_SYMBOL(mount_subtree);
-int ksys_mount(char __user *dev_name, char __user *dir_name, char __user *type,
- unsigned long flags, void __user *data)
+int ksys_mount(const char __user *dev_name, const char __user *dir_name,
+ const char __user *type, unsigned long flags, void __user *data)
{
int ret;
char *kernel_type;
@@ -3687,13 +3690,8 @@ static void __init init_mount_tree(void)
struct mount *m;
struct mnt_namespace *ns;
struct path root;
- struct file_system_type *type;
- type = get_fs_type("rootfs");
- if (!type)
- panic("Can't find rootfs type");
- mnt = vfs_kern_mount(type, 0, "rootfs", NULL);
- put_filesystem(type);
+ mnt = vfs_kern_mount(&rootfs_fs_type, 0, "rootfs", NULL);
if (IS_ERR(mnt))
panic("Can't create rootfs");
@@ -3746,6 +3744,7 @@ void __init mnt_init(void)
fs_kobj = kobject_create_and_add("fs", NULL);
if (!fs_kobj)
printk(KERN_WARNING "%s: kobj create error\n", __func__);
+ shmem_init();
init_rootfs();
init_mount_tree();
}