I don't know if Oracle (as a right holder of ZFS) can sue them (if they distribute the modules under the CDDL, they're fine as far as Oracle is concerned). It's

I don't know if Oracle (as a right holder of ZFS) can sue them (if they distribute the modules under the CDDL, they're fine as far as Oracle is concerned). It's all the Linux rights holders (including Oracle) who can sue over the GPL violation.