Messages in this thread | | | Date | Mon, 13 Apr 2020 14:43:00 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH] device_cgroup: Cleanup cgroup eBPF device filter code |
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On Fri, Apr 03, 2020 at 07:55:28PM +0200, Odin Ugedal wrote: > Original cgroup v2 eBPF code for filtering device access made it > possible to compile with CONFIG_CGROUP_DEVICE=n and still use the eBPF > filtering. Change > commit 4b7d4d453fc4 ("device_cgroup: Export devcgroup_check_permission") > reverted this, making it required to set it to y. > > Since the device filtering (and all the docs) for cgroup v2 is no longer > a "device controller" like it was in v1, someone might compile their > kernel with CONFIG_CGROUP_DEVICE=n. Then (for linux 5.5+) the eBPF > filter will not be invoked, and all processes will be allowed access > to all devices, no matter what the eBPF filter says.
Applied to cgroup/for-5.7-fixes.
Thanks.
-- tejun
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