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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull do_move_mount() fix from Al Viro: "Regression fix" * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vfs: move_mount: reject moving kernel internal mounts
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commit
2cd7cdc7e4
1 changed files with 4 additions and 3 deletions
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@ -2596,11 +2596,12 @@ static int do_move_mount(struct path *old_path, struct path *new_path)
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if (!check_mnt(p))
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goto out;
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/* The thing moved should be either ours or completely unattached. */
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if (attached && !check_mnt(old))
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/* The thing moved must be mounted... */
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if (!is_mounted(&old->mnt))
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goto out;
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if (!attached && !(ns && is_anon_ns(ns)))
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/* ... and either ours or the root of anon namespace */
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if (!(attached ? check_mnt(old) : is_anon_ns(ns)))
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goto out;
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if (old->mnt.mnt_flags & MNT_LOCKED)
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