diff options
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index ffb13f0562b0..6fbc9126367a 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1,8 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/fs/namespace.c * * (C) Copyright Al Viro 2000, 2001 - * Released under GPL v2. * * Based on code from fs/super.c, copyright Linus Torvalds and others. * Heavily rewritten. @@ -2105,6 +2105,7 @@ static int attach_recursive_mnt(struct mount *source_mnt, /* Notice when we are propagating across user namespaces */ if (child->mnt_parent->mnt_ns->user_ns != user_ns) lock_mnt_tree(child); + child->mnt.mnt_flags &= ~MNT_LOCKED; commit_tree(child); } put_mountpoint(smp); @@ -2595,11 +2596,12 @@ static int do_move_mount(struct path *old_path, struct path *new_path) if (!check_mnt(p)) goto out; - /* The thing moved should be either ours or completely unattached. */ - if (attached && !check_mnt(old)) + /* The thing moved must be mounted... */ + if (!is_mounted(&old->mnt)) goto out; - if (!attached && !(ns && is_anon_ns(ns))) + /* ... and either ours or the root of anon namespace */ + if (!(attached ? check_mnt(old) : is_anon_ns(ns))) goto out; if (old->mnt.mnt_flags & MNT_LOCKED) @@ -3445,6 +3447,7 @@ SYSCALL_DEFINE3(fsmount, int, fs_fd, unsigned int, flags, ns->root = mnt; ns->mounts = 1; list_add(&mnt->mnt_list, &ns->list); + mntget(newmount.mnt); /* Attach to an apparent O_PATH fd with a note that we need to unmount * it, not just simply put it. |