[LTP] [PATCH v3 0/3] mmap testing suite to cover MAP_32BIT

[Andrea Cervesato]

Create two new tests to verify MAP_32BIT functionality:

- mmap23: verify if it fails with invalid parameters
- mmap24: verify bondaries of the allocation

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
Changes in v3:
- switch to PROT_NONE and drop memory writes to avoid physical allocation and commit limits
- add unrestricted control mmap() on ENOMEM to detect generic memory exhaustion
- fix format warnings on 32-bit builds by replacing %zu with %lu
- use TESTPTR macro instead of bare mmap() calls

Changes in v2:
- fix description
- Link to v1: https://lore.kernel.org/20260828-mmap_32bit_coverage-v1-0-7f0b8b589773@suse.com

---
Andrea Cervesato (3):
      lapi/mmap: add MAP_32BIT fallback
      mmap23: add test for MAP_32BIT oversized mapping
      mmap24: add test for MAP_32BIT address limit

 include/lapi/mmap.h                       |   4 ++
 runtest/syscalls                          |   2 +
 testcases/kernel/syscalls/mmap/.gitignore |   2 +
 testcases/kernel/syscalls/mmap/mmap23.c   |  36 ++++++++++
 testcases/kernel/syscalls/mmap/mmap24.c   | 112 ++++++++++++++++++++++++++++++
 5 files changed, 156 insertions(+)
---
base-commit: f6933a16f304f36045ec39300c6496dae452933d
change-id: 20260827-mmap_32bit_coverage-09a22407aa39

Best regards,
--  
Andrea Cervesato <andrea.cervesato@suse.com>