On Thu, 23 Apr 2020, David Gow wrote:
This patchset contains everything needed to integrate KASAN and KUnit.
KUnit will be able to: (1) Fail tests when an unexpected KASAN error occurs (2) Pass tests when an expected KASAN error occurs
Convert KASAN tests to KUnit with the exception of copy_user_test because KUnit is unable to test those.
Add documentation on how to run the KASAN tests with KUnit and what to expect when running these tests.
This patchset depends on:
- "[PATCH v3 kunit-next 0/2] kunit: extend kunit resources API" [1]
- "[PATCH v3 0/3] Fix some incompatibilites between KASAN and FORTIFY_SOURCE" [2]
Changes from v6:
- Rebased on top of kselftest/kunit
- Rebased on top of Daniel Axtens' fix for FORTIFY_SOURCE incompatibilites [2]
- Removed a redundant report_enabled() check.
- Fixed some places with out of date Kconfig names in the documentation.
Sorry for the delay in getting to this; I retested the series with the above patchsets pre-applied; all looks good now, thanks! Looks like Daniel's patchset has a v4 so I'm not sure if that will have implications for applying your changes on top of it (haven't tested it yet myself).
For the series feel free to add
Tested-by: Alan Maguire alan.maguire@oracle.com
I'll try and take some time to review v7 shortly, but I wanted to confirm the issues I saw went away first in case you're blocked. The only remaining issue I see is that we'd need the named resource patchset to land first; it would be good to ensure the API it provides is solid so you won't need to respin.
Thanks!
Alan
Changes from v5:
- Split out the panic_on_warn changes to a separate patch.
- Fix documentation to fewer to the new Kconfig names.
- Fix some changes which were in the wrong patch.
- Rebase on top of kselftest/kunit (currently identical to 5.7-rc1)
Changes from v4:
- KASAN no longer will panic on errors if both panic_on_warn and kasan_multishot are enabled.
- As a result, the KASAN tests will no-longer disable panic_on_warn.
- This also means panic_on_warn no-longer needs to be exported.
- The use of temporary "kasan_data" variables has been cleaned up somewhat.
- A potential refcount/resource leak should multiple KASAN errors appear during an assertion was fixed.
- Some wording changes to the KASAN test Kconfig entries.
Changes from v3:
- KUNIT_SET_KASAN_DATA and KUNIT_DO_EXPECT_KASAN_FAIL have been
combined and included in KUNIT_DO_EXPECT_KASAN_FAIL() instead.
- Reordered logic in kasan_update_kunit_status() in report.c to be
easier to read.
- Added comment to not use the name "kasan_data" for any kunit tests
outside of KUNIT_EXPECT_KASAN_FAIL().
Changes since v2:
- Due to Alan's changes in [1], KUnit can be built as a module.
- The name of the tests that could not be run with KUnit has been
changed to be more generic: test_kasan_module.
- Documentation on how to run the new KASAN tests and what to expect
when running them has been added.
- Some variables and functions are now static.
- Now save/restore panic_on_warn in a similar way to kasan_multi_shot
and renamed the init/exit functions to be more generic to accommodate.
- Due to [3] in kasan_strings, kasan_memchr, and
kasan_memcmp will fail if CONFIG_AMD_MEM_ENCRYPT is enabled so return early and print message explaining this circumstance.
- Changed preprocessor checks to C checks where applicable.
Changes since v1:
- Make use of Alan Maguire's suggestion to use his patch that allows static resources for integration instead of adding a new attribute to the kunit struct
- All KUNIT_EXPECT_KASAN_FAIL statements are local to each test
- The definition of KUNIT_EXPECT_KASAN_FAIL is local to the test_kasan.c file since it seems this is the only place this will be used.
- Integration relies on KUnit being builtin
- copy_user_test has been separated into its own file since KUnit is unable to test these. This can be run as a module just as before, using CONFIG_TEST_KASAN_USER
- The addition to the current task has been separated into its own patch as this is a significant enough change to be on its own.
[1] https://lore.kernel.org/linux-kselftest/1585313122-26441-1-git-send-email-al... [2] https://lkml.org/lkml/2020/4/23/708 [3] https://bugzilla.kernel.org/show_bug.cgi?id=206337
David Gow (1): mm: kasan: Do not panic if both panic_on_warn and kasan_multishot set
Patricia Alfonso (4): Add KUnit Struct to Current Task KUnit: KASAN Integration KASAN: Port KASAN Tests to KUnit KASAN: Testing Documentation
Documentation/dev-tools/kasan.rst | 70 +++ include/kunit/test.h | 5 + include/linux/kasan.h | 6 + include/linux/sched.h | 4 + lib/Kconfig.kasan | 18 +- lib/Makefile | 3 +- lib/kunit/test.c | 13 +- lib/test_kasan.c | 688 +++++++++++++----------------- lib/test_kasan_module.c | 76 ++++ mm/kasan/report.c | 34 +- 10 files changed, 514 insertions(+), 403 deletions(-) create mode 100644 lib/test_kasan_module.c
-- 2.26.2.303.gf8c07b1a785-goog