> From: Alexei Starovoitov [mailto:alexei.starovoitov@xxxxxxxxx] > Sent: Wednesday, March 2, 2022 11:21 PM > On Wed, Mar 02, 2022 at 12:13:55PM +0100, Roberto Sassu wrote: > > 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 2-6 give 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 7-9 allow eBPF-based LSMs to evaluate files read by the kernel. > > > > Changelog > > > > v2: > > - Add better description to patch 1 (suggested by Shuah) > > - Recalculate digest if it is not fresh (when IMA_COLLECTED flag not set) > > - Move declaration of bpf_ima_file_hash() at the end (suggested by > > Yonghong) > > - Add tests to check if the digest has been recalculated > > - Add deny test for bpf_kernel_read_file() > > - Add description to tests > > > > 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 (9): > > 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: Move sample generation code to ima_test_common() > > selftests/bpf: Add test for bpf_ima_file_hash() > > selftests/bpf: Check if the digest is refreshed after a file write > > bpf-lsm: Make bpf_lsm_kernel_read_file() as sleepable > > selftests/bpf: Add test for bpf_lsm_kernel_read_file() > > selftests/bpf: Check that bpf_kernel_read_file() denies reading IMA > > policy > > We have to land this set through bpf-next. > Please get the Acks for patches 1 and 2, so we can proceed. Ok. Mimi, do you have time to have a look at those patches? Thanks Roberto HUAWEI TECHNOLOGIES Duesseldorf GmbH, HRB 56063 Managing Director: Li Peng, Zhong Ronghua
