Backport summary ---------------- 1756d7994ad8 ("cgroup: Use open-time credentials for process migraton perm checks") * Cherry pick from 4.19-stable, no modifications.
0d2b5955b362 ("cgroup: Allocate cgroup_file_ctx for kernfs_open_file->priv") * Cherry-pick from 4.19-stable, minor contextual adjustement.
e57457641613 ("cgroup: Use open-time cgroup namespace for process migration perm checks") * Cherry-pick from 4.19-stable, no modifications.
Testing ------- There are no cgroup selftests in 4.14, but when running the ones from 4.19 on the 4.14 kernel, all selftests pass:
root@intel-x86-64:~# ./test_core ok 1 test_cgcore_internal_process_constraint ok 2 test_cgcore_top_down_constraint_enable ok 3 test_cgcore_top_down_constraint_disable ok 4 test_cgcore_no_internal_process_constraint_on_threads ok 5 test_cgcore_parent_becomes_threaded ok 6 test_cgcore_invalid_domain ok 7 test_cgcore_populated ok 8 test_cgcore_lesser_euid_open ok 9 test_cgcore_lesser_ns_open
Tejun Heo (3): cgroup: Use open-time credentials for process migraton perm checks cgroup: Allocate cgroup_file_ctx for kernfs_open_file->priv cgroup: Use open-time cgroup namespace for process migration perm checks
kernel/cgroup/cgroup-internal.h | 19 ++++++++ kernel/cgroup/cgroup-v1.c | 33 ++++++++------ kernel/cgroup/cgroup.c | 81 +++++++++++++++++++++++---------- 3 files changed, 95 insertions(+), 38 deletions(-)