[PATCH v1 0/2] mm: Clear uffd-wp PTE/PMD state on mremap()

Hi All,

This series contains a fix for a warning emitted when a uffd-registered region, which doesn't have UFFD_FEATURE_EVENT_REMAP, is mremap()ed. patch 1 describes the problem and fixes it, and patch 2 adds a selftest to verify the fix.

Thanks to Mikołaj Lenczewski who originally created the patch, which I have subsequently extended.

Applies on top of mm-unstable (f349e79bfbf3)

Thanks, Ryan

Ryan Roberts (2): mm: Clear uffd-wp PTE/PMD state on mremap() selftests/mm: Introduce uffd-wp-mremap regression test

include/linux/userfaultfd_k.h | 12 + mm/huge_memory.c | 12 + mm/hugetlb.c | 14 +- mm/mremap.c | 32 +- tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 2 + tools/testing/selftests/mm/run_vmtests.sh | 1 + tools/testing/selftests/mm/uffd-wp-mremap.c | 380 ++++++++++++++++++++ 8 files changed, 452 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/mm/uffd-wp-mremap.c

-- 2.43.0