Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[cascardo/linux.git] / fs / pnode.c

diff --git a/fs/pnode.c b/fs/pnode.c
index 3e000a5..8b29d21 100644 (file)
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -9,6 +9,7 @@
 #include <linux/mnt_namespace.h>
 #include <linux/mount.h>
 #include <linux/fs.h>
+#include <linux/nsproxy.h>
 #include "internal.h"
 #include "pnode.h"
 
@@ -220,6 +221,7 @@ static struct mount *get_source(struct mount *dest,
 int propagate_mnt(struct mount *dest_mnt, struct dentry *dest_dentry,
                    struct mount *source_mnt, struct list_head *tree_list)
 {
+       struct user_namespace *user_ns = current->nsproxy->mnt_ns->user_ns;
        struct mount *m, *child;
        int ret = 0;
        struct mount *prev_dest_mnt = dest_mnt;
@@ -237,6 +239,10 @@ int propagate_mnt(struct mount *dest_mnt, struct dentry *dest_dentry,
 
                source =  get_source(m, prev_dest_mnt, prev_src_mnt, &type);
 
+               /* Notice when we are propagating across user namespaces */
+               if (m->mnt_ns->user_ns != user_ns)
+                       type |= CL_UNPRIVILEGED;
+
                child = copy_tree(source, source->mnt.mnt_root, type);
                if (IS_ERR(child)) {
                        ret = PTR_ERR(child);