[PATCH v2 0/2] firewire: Fix out-of-bounds access in CSR iterator

[Sreeraj S Kurup <sreekuttan2156239@gmail.com>]

Hi Takashi,

This series fixes an out-of-bounds read in fw_csr_iterator_next() and
adds KUnit tests for the CSR iterator.

The first patch fixes the iterator by checking its position before
dereferencing the current entry.

The second patch adds a separate KUnit test suite covering:

- Iteration over valid entries.
- Calling the iterator after reaching the end.
- Iteration over an empty directory.

It also adds a separate Kconfig option for the iterator tests.

Testing:

- Ran the FireWire KUnit tests using:
  python3 tools/testing/kunit/kunit.py run
  --kunitconfig=drivers/firewire/.kunitconfig

- All tests passed.

- Results:
  [14:47:14] ======== firewire-config-rom-iterator (3 subtests) =========
  [14:47:14] [PASSED] test_csr_iterator_with_valid_entries
  [14:47:14] [PASSED] test_csr_iterator_at_end
  [14:47:14] [PASSED] test_csr_iterator_empty_directory
  [14:47:14] ========== [PASSED] firewire-config-rom-iterator ===========

Please review the patches.

Regards,
Sreeraj

Sreeraj S Kurup (2):
  firewire: Fix out-of-bounds access in CSR iterator
  firewire: Add KUnit tests for CSR iterator

 drivers/firewire/.kunitconfig               |  1 +
 drivers/firewire/Kconfig                    | 12 +++
 drivers/firewire/config-rom-iterator-test.c | 93 +++++++++++++++++++++
 drivers/firewire/core-device.c              | 10 ++-
 4 files changed, 115 insertions(+), 1 deletion(-)
 create mode 100644 drivers/firewire/config-rom-iterator-test.c

-- 
2.55.0