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path: root/tools/testing/selftests/bpf/prog_tests/test_ima.c (follow)
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2023-03-08selftests/bpf: Fix IMA testRoberto Sassu1-8/+21
Commit 62622dab0a28 ("ima: return IMA digest value only when IMA_COLLECTED flag is set") caused bpf_ima_inode_hash() to refuse to give non-fresh digests. IMA test #3 assumed the old behavior, that bpf_ima_inode_hash() still returned also non-fresh digests. Correct the test by accepting both cases. If the samples returned are 1, assume that the commit above is applied and that the returned digest is fresh. If the samples returned are 2, assume that the commit above is not applied, and check both the non-fresh and fresh digest. Fixes: 62622dab0a28 ("ima: return IMA digest value only when IMA_COLLECTED flag is set") Reported-by: David Vernet <void@manifault.com> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Matt Bobrowski <mattbobrowski@google.com> Link: https://lore.kernel.org/bpf/20230308103713.1681200-1-roberto.sassu@huaweicloud.com
2022-03-10selftests/bpf: Check that bpf_kernel_read_file() denies reading IMA policyRoberto Sassu1-0/+17
Check that bpf_kernel_read_file() denies the reading of an IMA policy, by ensuring that ima_setup.sh exits with an error. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220302111404.193900-10-roberto.sassu@huawei.com
2022-03-10selftests/bpf: Add test for bpf_lsm_kernel_read_file()Roberto Sassu1-0/+19
Test the ability of bpf_lsm_kernel_read_file() to call the sleepable functions bpf_ima_inode_hash() or bpf_ima_file_hash() to obtain a measurement of a loaded IMA policy. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220302111404.193900-9-roberto.sassu@huawei.com
2022-03-10selftests/bpf: Check if the digest is refreshed after a file writeRoberto Sassu1-3/+69
Verify that bpf_ima_inode_hash() returns a non-fresh digest after a file write, and that bpf_ima_file_hash() returns a fresh digest. Verification is done by requesting the digest from the bprm_creds_for_exec hook, called before ima_bprm_check(). Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220302111404.193900-7-roberto.sassu@huawei.com
2022-03-10selftests/bpf: Add test for bpf_ima_file_hash()Roberto Sassu1-4/+39
Add new test to ensure that bpf_ima_file_hash() returns the digest of the executed files. Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220302111404.193900-6-roberto.sassu@huawei.com
2021-10-28selftests/bpf: Fix memory leak in test_imaKumar Kartikeya Dwivedi1-1/+2
The allocated ring buffer is never freed, do so in the cleanup path. Fixes: f446b570ac7e ("bpf/selftests: Update the IMA test to use BPF ring buffer") Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20211028063501.2239335-9-memxor@gmail.com
2021-03-25selftests/bpf: Better error messages for ima_setup.sh failuresKP Singh1-2/+4
The current implementation uses the CHECK_FAIL macro which does not provide useful error messages when the script fails. Use the CHECK macro instead and provide more descriptive messages to aid debugging. Signed-off-by: KP Singh <kpsingh@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210322170720.2926715-1-kpsingh@kernel.org
2021-02-04bpf/selftests: Update the IMA test to use BPF ring bufferKP Singh1-5/+18
Instead of using shared global variables between userspace and BPF, use the ring buffer to send the IMA hash on the BPF ring buffer. This helps in validating both IMA and the usage of the ringbuffer in sleepable programs. Signed-off-by: KP Singh <kpsingh@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210204193622.3367275-3-kpsingh@kernel.org
2020-11-26bpf: Add a selftest for bpf_ima_inode_hashKP Singh1-0/+74
The test does the following: - Mounts a loopback filesystem and appends the IMA policy to measure executions only on this file-system. Restricting the IMA policy to a particular filesystem prevents a system-wide IMA policy change. - Executes an executable copied to this loopback filesystem. - Calls the bpf_ima_inode_hash in the bprm_committed_creds hook and checks if the call succeeded and checks if a hash was calculated. The test shells out to the added ima_setup.sh script as the setup is better handled in a shell script and is more complicated to do in the test program or even shelling out individual commands from C. The list of required configs (i.e. IMA, SECURITYFS, IMA_{WRITE,READ}_POLICY) for running this test are also updated. Suggested-by: Mimi Zohar <zohar@linux.ibm.com> (limit policy rule to loopback mount) Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20201124151210.1081188-4-kpsingh@chromium.org
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