[PATCH 0/2] lib/genalloc: fix a NULL pool check and add KUnit tests

[Amit Patole]

genalloc has no unit tests, so patch 2 adds a KUnit suite. Writing it
turned up that gen_pool_dma_alloc() and gen_pool_dma_zalloc() crash on
a NULL pool, while the other DMA helpers return NULL as
gen_pool_dma_alloc() originally did. Patch 1 restores the check; no
in-tree caller passes a NULL pool, so it is not marked for stable.

Tested on UML with a kunitconfig of CONFIG_KUNIT=y and
CONFIG_GENALLOC_KUNIT_TEST=y: 12/12 pass with patch 1, and
genalloc_dma_test crashes without it.

---
Amit Patole (2):
      lib/genalloc: don't dereference a NULL pool in gen_pool_dma_[z]alloc()
      lib/tests: add KUnit tests for genalloc

 lib/Kconfig.debug          |  15 ++
 lib/genalloc.c             |   6 +
 lib/tests/Makefile         |   1 +
 lib/tests/genalloc_kunit.c | 508 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 530 insertions(+)
---
base-commit: 05441d697f7f9a927264f4058cbbc6a03dfcac9d
change-id: 20261106-kunit-genalloc-32ccb20f97a6

Best regards,
--  
Amit Patole <amit.patole@xxxxxxxxx>