[Devel] [PATCH hci-8.1 0/7] selftests/mm: broader MADV_DOEXEC coverage

[Konstantin Khorenko]

Selftests for MADV_DOEXEC beyond the cases the fixes need: the sysctl
and the refused mappings, partial and attribute-carrying ranges (mlock,
DONTFORK, WIPEONFORK, userfaultfd, memory policy), the opt-in note
(missing, malformed, not in the last PT_NOTE), a preserved range under
the new stack, large, swapped and partly marked THP ranges, an exec from
a vfork() child, VM_MAYEXEC read from smaps and given back to the
copies, and a /proc/pid/mem write and a vhost kthread that keep the old
mm across the exec. Failing cases say why. Applies on top of "mm: allow
MADV_DOEXEC on VFIO BAR mappings".

All cases pass on release and debug kernels with the whole stack.

https://virtuozzo.atlassian.net/browse/VSTOR-150234

---
Konstantin Khorenko (7):
      selftests/mm: cover the MADV_DOEXEC interface and VMA attributes
      selftests/mm: cover the MADV_DOEXEC opt-in note and the new stack
      selftests/mm: cover large, swapped and partly marked THP ranges
      selftests/mm: check that MADV_DOEXEC refuses an exec from a vfork() child
      selftests/mm: check VM_MAYEXEC of MADV_DOEXEC ranges in smaps
      selftests/mm: check who can still reach the old mm of a preserving exec
      selftests/mm: say why a doexec case fails

 tools/testing/selftests/mm/doexec.c | 1456 ++++++++++++++++++++++++++++++-----
 1 file changed, 1283 insertions(+), 173 deletions(-)
---
base-commit: 569abd49ca6b0b102f2e5b995a15459b53a8a19f
change-id: 20261014-b4-prep-khorenko-vstor-149847-5-doexec-selftests-496ac17b9688

Best regards,
--  
Konstantin Khorenko <khorenko at virtuozzo.com>