https://github.com/torvalds/linux
Revision eec8fd0277e37cf447b88c6be181e81df867bcf1 authored by Odin Ugedal on 03 April 2020, 17:55:28 UTC, committed by Tejun Heo on 13 April 2020, 18:41:54 UTC
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.
Signed-off-by: Odin Ugedal <odin@ugedal.com>
Acked-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Tip revision: eec8fd0277e37cf447b88c6be181e81df867bcf1 authored by Odin Ugedal on 03 April 2020, 17:55:28 UTC
device_cgroup: Cleanup cgroup eBPF device filter code
device_cgroup: Cleanup cgroup eBPF device filter code
Tip revision: eec8fd0
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| .clang-format | -rw-r--r-- | 15.5 KB |
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