Hi, This is a new V4 bunch of RFC patches related to Landlock LSM network confinement. It brings deep refactirong and commit splitting of previous version V3. Also added additional selftests. This patch series can be applied on top of v5.17-rc3. All test were run in QEMU evironment and compiled with -static flag. 1. network_test: 9/9 tests passed. 2. base_test: 8/8 tests passed. 3. fs_test: 46/46 tests passed. 4. ptrace_test: 4/8 tests passed. Tests were also launched for Landlock version without v4 patch: 1. base_test: 8/8 tests passed. 2. fs_test: 46/46 tests passed. 3. ptrace_test: 4/8 tests passed. Could not provide test coverage cause had problems with tests on VM (no -static flag the tests compiling, no v4 patch applied): 1. base_test: 7/8 tests passed. Error: # Starting 8 tests from 1 test cases. # RUN global.inconsistent_attr ... # base_test.c:51:inconsistent_attr:Expected ENOMSG (42) == errno (22) # inconsistent_attr: Test terminated by assertion 2. fs_test: 0 / 46 tests passed Error for all tests: # common.h:126:no_restriction:Expected -1 (-1) != cap_set_proc(cap_p) (-1) # common.h:127:no_restriction:Failed to cap_set_proc: Operation not permitted # fs_test.c:106:no_restriction:Expected 0 (0) == mkdir(path, 0700) (-1) # fs_test.c:107:no_restriction:Failed to create directory "tmp": File exists 3. ptrace_test: 4 / 8 tests passed. Previous versions: v3: https://lore.kernel.org/linux-security-module/20220124080215.265538-1-konstantin.meskhidze@xxxxxxxxxx/ v2: https://lore.kernel.org/linux-security-module/20211228115212.703084-1-konstantin.meskhidze@xxxxxxxxxx/ v1: https://lore.kernel.org/linux-security-module/20211210072123.386713-1-konstantin.meskhidze@xxxxxxxxxx/ Konstantin Meskhidze (15): landlock: access mask renaming landlock: filesystem access mask helpers landlock: landlock_find/insert_rule refactoring landlock: merge and inherit function refactoring landlock: unmask_layers() function refactoring landlock: landlock_add_rule syscall refactoring landlock: user space API network support landlock: add support network rules landlock: TCP network hooks implementation seltest/landlock: add tests for bind() hooks seltest/landlock: add tests for connect() hooks seltest/landlock: connect() with AF_UNSPEC tests seltest/landlock: rules overlapping test seltest/landlock: ruleset expanding test seltest/landlock: invalid user input data test include/uapi/linux/landlock.h | 48 ++ security/landlock/Kconfig | 1 + security/landlock/Makefile | 2 +- security/landlock/fs.c | 72 +- security/landlock/limits.h | 6 + security/landlock/net.c | 180 +++++ security/landlock/net.h | 22 + security/landlock/ruleset.c | 383 ++++++++-- security/landlock/ruleset.h | 72 +- security/landlock/setup.c | 2 + security/landlock/syscalls.c | 176 +++-- .../testing/selftests/landlock/network_test.c | 665 ++++++++++++++++++ 12 files changed, 1434 insertions(+), 195 deletions(-) create mode 100644 security/landlock/net.c create mode 100644 security/landlock/net.h create mode 100644 tools/testing/selftests/landlock/network_test.c -- 2.25.1
