proc: prevent stacking filesystems on top

[pandora-kernel.git] / fs / proc / root.c

diff --git a/fs/proc/root.c b/fs/proc/root.c
index 03102d9..c2f39ab 100644 (file)
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -53,6 +53,13 @@ static struct dentry *proc_mount(struct file_system_type *fs_type,
        if (IS_ERR(sb))
                return ERR_CAST(sb);
 
        if (IS_ERR(sb))
                return ERR_CAST(sb);
 

+       /*
+        * procfs isn't actually a stacking filesystem; however, there is
+        * too much magic going on inside it to permit stacking things on
+        * top of it
+        */
+       sb->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH;
+

        if (!sb->s_root) {
                sb->s_flags = flags;
                err = proc_fill_super(sb);
        if (!sb->s_root) {
                sb->s_flags = flags;
                err = proc_fill_super(sb);