Christian Brauner
07ea85a7d8
Add checks for the two ways of creating inodes that went past the path hooks: - linkable O_TMPFILE refused on the host directory and the host tmpfs - O_TMPFILE with O_EXCL still allowed in the host directory - linkable O_TMPFILE and linkat() allowed on the private and the idmapped tmpfs - O_TMPFILE refused through the cloned mounts and from the nested user namespace - RENAME_WHITEOUT refused in the host directory, allowed on the private and the idmapped tmpfs The positive checks make sure we don't refuse more than for named files.
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