[PATCH v4 RESEND 0/7] Handle faults in KUnit tests

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This patch series teaches KUnit to handle kthread faults as errors, and
it brings a few related fixes and improvements.

Shuah, everything should be OK now, could you please merge this series?

All these tests pass (on top of v6.8):
./tools/testing/kunit/kunit.py run --alltests
./tools/testing/kunit/kunit.py run --alltests --arch x86_64
./tools/testing/kunit/kunit.py run --alltests --arch arm64 \

I also built and ran KUnit tests as a kernel module.

A new test case check NULL pointer dereference, which wasn't possible

This is useful to test current kernel self-protection mechanisms or
future ones such as Heki: https://github.com/heki-linux

Previous versions:
v3: https://lore.kernel.org/r/20240319104857.70783-1-mic@xxxxxxxxxxx
v2: https://lore.kernel.org/r/20240301194037.532117-1-mic@xxxxxxxxxxx
v1: https://lore.kernel.org/r/20240229170409.365386-1-mic@xxxxxxxxxxx


Mickaël Salaün (7):
  kunit: Handle thread creation error
  kunit: Fix kthread reference
  kunit: Fix timeout message
  kunit: Handle test faults
  kunit: Fix KUNIT_SUCCESS() calls in iov_iter tests
  kunit: Print last test location on fault
  kunit: Add tests for fault

 include/kunit/test.h      | 24 ++++++++++++++++++---
 include/kunit/try-catch.h |  3 ---
 kernel/kthread.c          |  1 +
 lib/kunit/kunit-test.c    | 45 ++++++++++++++++++++++++++++++++++++++-
 lib/kunit/try-catch.c     | 38 ++++++++++++++++++++++-----------
 lib/kunit_iov_iter.c      | 18 ++++++++--------
 6 files changed, 101 insertions(+), 28 deletions(-)

base-commit: e8f897f4afef0031fe618a8e94127a0934896aba

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