AAvenger-285714landlock: Add the errata interface
| 文件 | 最后提交记录 | 最后更新时间 |
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selftests/landlock: Add user space tests Test all Landlock system calls, ptrace hooks semantic and filesystem access-control with multiple layouts. Test coverage for security/landlock/ is 93.6% of lines. The code not covered only deals with internal kernel errors (e.g. memory allocation) and race conditions. Cc: James Morris <jmorris@namei.org> Cc: Jann Horn <jannh@google.com> Cc: Serge E. Hallyn <serge@hallyn.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com> Reviewed-by: Vincent Dagonneau <vincent.dagonneau@ssi.gouv.fr> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210422154123.13086-11-mic@digikod.net Signed-off-by: James Morris <jamorris@linux.microsoft.com> | 5 年前 | |
selftests/landlock: Build without static libraries The only (forced) static test binary doesn't depend on libcap. Because using -lcap on systems that don't have such static library would fail (e.g. on Arch Linux), let's be more specific and require only dynamic libcap linking. Fixes: a52540522c95 ("selftests/landlock: Fix out-of-tree builds") Cc: Anders Roxell <anders.roxell@linaro.org> Cc: Guillaume Tucker <guillaume.tucker@collabora.com> Cc: Mark Brown <broonie@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: stable@vger.kernel.org Signed-off-by: Mickaël Salaün <mic@digikod.net> Link: https://lore.kernel.org/r/20221019200536.2771316-1-mic@digikod.net | 3 年前 | |
landlock: Add the errata interface commit 15383a0d63dbcd63dc7e8d9ec1bf3a0f7ebf64ac upstream. Some fixes may require user space to check if they are applied on the running kernel before using a specific feature. For instance, this applies when a restriction was previously too restrictive and is now getting relaxed (e.g. for compatibility reasons). However, non-visible changes for legitimate use (e.g. security fixes) do not require an erratum. Because fixes are backported down to a specific Landlock ABI, we need a way to avoid cherry-pick conflicts. The solution is to only update a file related to the lower ABI impacted by this issue. All the ABI files are then used to create a bitmask of fixes. The new errata interface is similar to the one used to get the supported Landlock ABI version, but it returns a bitmask instead because the order of fixes may not match the order of versions, and not all fixes may apply to all versions. The actual errata will come with dedicated commits. The description is not actually used in the code but serves as documentation. Create the landlock_abi_version symbol and use its value to check errata consistency. Update test_base's create_ruleset_checks_ordering tests and add errata tests. This commit is backportable down to the first version of Landlock. Fixes: 3532b0b4352c ("landlock: Enable user space to infer supported features") Cc: Günther Noack <gnoack@google.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250318161443.279194-3-mic@digikod.net Signed-off-by: Mickaël Salaün <mic@digikod.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> (cherry picked from commit efde4462b3217e777f385c8d2ade960de3d9666e) | 1 年前 | |
selftests/landlock: Test FD passing from restricted to unrestricted processes A file descriptor created in a restricted process carries Landlock restrictions with it which will apply even if the same opened file is used from an unrestricted process. This change extracts suitable FD-passing helpers from base_test.c and moves them to common.h. We use the fixture variants from the ftruncate fixture to exercise the same scenarios as in the open_and_ftruncate test, but doing the Landlock restriction and open() in a different process than the ftruncate() call. Signed-off-by: Günther Noack <gnoack3000@gmail.com> Link: https://lore.kernel.org/r/20221018182216.301684-9-gnoack3000@gmail.com Signed-off-by: Mickaël Salaün <mic@digikod.net> | 3 年前 | |
selftests/landlock: Add cred_transfer test commit cc374782b6ca0fd634482391da977542443d3368 upstream. Check that keyctl(KEYCTL_SESSION_TO_PARENT) preserves the parent's restrictions. Fixes: e1199815b47b ("selftests/landlock: Add user space tests") Co-developed-by: Jann Horn <jannh@google.com> Signed-off-by: Jann Horn <jannh@google.com> Link: https://lore.kernel.org/r/20240724.Ood5aige9she@digikod.net Signed-off-by: Mickaël Salaün <mic@digikod.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> (cherry picked from commit 27be7ff9ffb4ab9570de36debcb45d5b61f753e4) | 1 年前 | |
selftests/landlock: Add hostfs tests Add tests for the hostfs filesystems to make sure it has a consistent inode management, which is required for Landlock's file hierarchy identification. This adds 5 new tests for layout3_fs with the hostfs variant. Add hostfs to the new (architecture-specific) config.um file. The hostfs filesystem, only available for an User-Mode Linux kernel, is special because we cannot explicitly mount it. The layout3_fs.hostfs variant tests are skipped if the current test directory is not backed by this filesystem. The layout3_fs.hostfs.tag_inode_dir_child and layout3_fs.hostfs.tag_inode_file tests pass thanks to a previous commit fixing hostfs inode management. Without this fix, the deny-by-default policy would apply and all access requests would be denied. Link: https://lore.kernel.org/r/20230612191430.339153-7-mic@digikod.net Signed-off-by: Mickaël Salaün <mic@digikod.net> | 3 年前 | |
selftests/landlock: Fix error message [ Upstream commit 2107c35128ad751b201eb92fe91443450d9e5c37 ] The global variable errno may not be set in test_execute(). Do not use it in related error message. Cc: Günther Noack <gnoack@google.com> Fixes: e1199815b47b ("selftests/landlock: Add user space tests") Link: https://lore.kernel.org/r/20250108154338.1129069-21-mic@digikod.net Signed-off-by: Mickaël Salaün <mic@digikod.net> Signed-off-by: Sasha Levin <sashal@kernel.org> | 1 年前 | |
selftests/landlock: Test ptrace as much as possible with Yama Update ptrace tests according to all potential Yama security policies. This is required to make such tests pass even if Yama is enabled. Tests are not skipped but they now check both Landlock and Yama boundary restrictions at run time to keep a maximum test coverage (i.e. positive and negative testing). Signed-off-by: Jeff Xu <jeffxu@google.com> Link: https://lore.kernel.org/r/20230114020306.1407195-2-jeffxu@google.com Cc: stable@vger.kernel.org [mic: Add curly braces around EXPECT_EQ() to make it build, and improve commit message] Co-developed-by: Mickaël Salaün <mic@digikod.net> Signed-off-by: Mickaël Salaün <mic@digikod.net> | 3 年前 | |
selftests/landlock: Add user space tests Test all Landlock system calls, ptrace hooks semantic and filesystem access-control with multiple layouts. Test coverage for security/landlock/ is 93.6% of lines. The code not covered only deals with internal kernel errors (e.g. memory allocation) and race conditions. Cc: James Morris <jmorris@namei.org> Cc: Jann Horn <jannh@google.com> Cc: Serge E. Hallyn <serge@hallyn.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com> Reviewed-by: Vincent Dagonneau <vincent.dagonneau@ssi.gouv.fr> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210422154123.13086-11-mic@digikod.net Signed-off-by: James Morris <jamorris@linux.microsoft.com> | 5 年前 |