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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull vfs fixes from Al Viro:
 "MS_MOVE regression fix + breakage in fsmount(2) (also introduced in
  this cycle, along with fsmount(2) itself).

  I'm still digging through the piles of mail, so there might be more
  fixes to follow, but these two are obvious and self-contained, so
  there's no point delaying those..."

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs/namespace: fix unprivileged mount propagation
  vfs: fsmount: add missing mntget()
This commit is contained in:
Linus Torvalds 2019-06-17 16:28:28 -07:00
commit 29f785ff76
2 changed files with 2 additions and 1 deletions
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2
fs/namespace.c
View File

@ -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);
@ -3445,6 +3446,7 @@ 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.

1
fs/pnode.c
View File

@ -261,7 +261,6 @@ static int propagate_one(struct mount *m)
child = copy_tree(last_source, last_source->mnt.mnt_root, type);
if (IS_ERR(child))
return PTR_ERR(child);
child->mnt.mnt_flags &= ~MNT_LOCKED;
mnt_set_mountpoint(m, mp, child);
last_dest = m;
last_source = child;