X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=fs%2Fnamespace.c;h=34156260c9b6586939e932e3856cc0211e98cd97;hp=587eb0d707ee8d7fd4119aee67c5e4791f4d9d9e;hb=fb1c8f93d869b34cacb8b8932e2b83d96a19d720;hpb=08cd84c81f27d5bd22ba958b7cae6d566c509280

diff --git a/fs/namespace.c b/fs/namespace.c
index 587eb0d707ee..34156260c9b6 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -40,7 +40,7 @@ static inline int sysfs_init(void)
  __cacheline_aligned_in_smp DEFINE_SPINLOCK(vfsmount_lock);
 
 static struct list_head *mount_hashtable;
-static int hash_mask, hash_bits;
+static int hash_mask __read_mostly, hash_bits __read_mostly;
 static kmem_cache_t *mnt_cache; 
 
 static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)
@@ -160,7 +160,7 @@ clone_mnt(struct vfsmount *old, struct dentry *root)
 		mnt->mnt_root = dget(root);
 		mnt->mnt_mountpoint = mnt->mnt_root;
 		mnt->mnt_parent = mnt;
-		mnt->mnt_namespace = old->mnt_namespace;
+		mnt->mnt_namespace = current->namespace;
 
 		/* stick the duplicate mount on the same expiry list
 		 * as the original if that was on one */
@@ -1334,8 +1334,12 @@ asmlinkage long sys_pivot_root(const char __user *new_root, const char __user *p
 	error = -EINVAL;
 	if (user_nd.mnt->mnt_root != user_nd.dentry)
 		goto out2; /* not a mountpoint */
+	if (user_nd.mnt->mnt_parent == user_nd.mnt)
+		goto out2; /* not attached */
 	if (new_nd.mnt->mnt_root != new_nd.dentry)
 		goto out2; /* not a mountpoint */
+	if (new_nd.mnt->mnt_parent == new_nd.mnt)
+		goto out2; /* not attached */
 	tmp = old_nd.mnt; /* make sure we can reach put_old from new_root */
 	spin_lock(&vfsmount_lock);
 	if (tmp != new_nd.mnt) {