diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/namespace.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index f44e5448c8a0..56c1dcffb4dc 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -5086,7 +5086,7 @@ static struct mount *listmnt_next(struct mount *curr, bool reverse) static int grab_requested_root(struct mnt_namespace *ns, struct path *root) { - struct mount *first; + struct mount *first, *child; rwsem_assert_held(&namespace_sem); @@ -5103,10 +5103,16 @@ static int grab_requested_root(struct mnt_namespace *ns, struct path *root) if (RB_EMPTY_ROOT(&ns->mounts)) return -ENOENT; - first = listmnt_next(ns->root, false); - if (!first) - return -ENOENT; - root->mnt = mntget(&first->mnt); + first = child = ns->root; + for (;;) { + child = listmnt_next(child, false); + if (!child) + return -ENOENT; + if (child->mnt_parent == first) + break; + } + + root->mnt = mntget(&child->mnt); root->dentry = dget(root->mnt->mnt_root); return 0; } |