> From: Roberto Sassu > Sent: Tuesday, February 15, 2022 1:41 PM > Extend the interoperability with IMA, to give wider flexibility for the > implementation of integrity-focused LSMs based on eBPF. > > Patch 1 fixes some style issues. > > Patches 2-4 gives the ability to eBPF-based LSMs to take advantage of the > measurement capability of IMA without needing to setup a policy in IMA > (those LSMs might implement the policy capability themselves). > > Patches 5-6 allows eBPF-based LSMs to evaluate files read by the kernel. Hi everyone I published the new DIGLIM eBPF, that takes advantage of the new features introduced with this patch set: https://github.com/robertosassu/diglim-ebpf the eBPF program is in ebpf/diglim_kern.c If you could have a look and give me some comments or suggestions, it would be very appreciated! Thanks Roberto HUAWEI TECHNOLOGIES Duesseldorf GmbH, HRB 56063 Managing Director: Li Peng, Zhong Ronghua > Changelog > > v1: > - Modify ima_file_hash() only and allow the usage of the function with the > modified behavior by eBPF-based LSMs through the new function > bpf_ima_file_hash() (suggested by Mimi) > - Make bpf_lsm_kernel_read_file() sleepable so that bpf_ima_inode_hash() > and bpf_ima_file_hash() can be called inside the implementation of > eBPF-based LSMs for this hook > > Roberto Sassu (6): > ima: Fix documentation-related warnings in ima_main.c > ima: Always return a file measurement in ima_file_hash() > bpf-lsm: Introduce new helper bpf_ima_file_hash() > selftests/bpf: Add test for bpf_ima_file_hash() > bpf-lsm: Make bpf_lsm_kernel_read_file() as sleepable > selftests/bpf: Add test for bpf_lsm_kernel_read_file() > > include/uapi/linux/bpf.h | 11 +++++ > kernel/bpf/bpf_lsm.c | 21 +++++++++ > security/integrity/ima/ima_main.c | 47 ++++++++++++------- > tools/include/uapi/linux/bpf.h | 11 +++++ > tools/testing/selftests/bpf/ima_setup.sh | 2 + > .../selftests/bpf/prog_tests/test_ima.c | 30 ++++++++++-- > tools/testing/selftests/bpf/progs/ima.c | 34 ++++++++++++-- > 7 files changed, 132 insertions(+), 24 deletions(-) > > -- > 2.32.0
