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.
