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3808006edf
Change file related checks to use user namespaces and make sure involved uids/gids are mappable in the current namespace. Note that checks without file ownership information will still not take user namespaces into account, as some of these should be handled via 'zfs allow' (otherwise root in a user namespace could issue commands such as `zpool export`). This also adds an initial user namespace regression test for the setgid bit loss, with a user_ns_exec helper usable in further tests. Additionally, configure checks for the required user namespace related features are added for: * ns_capable * kuid/kgid_has_mapping() * user_ns in cred_t Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com> Closes #6800 Closes #7270 |
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