The patch titled Subject: selftests/mm: sigbus-wp test requires UFFD_FEATURE_WP_HUGETLBFS_SHMEM has been added to the -mm mm-hotfixes-unstable branch. Its filename is selftests-mm-sigbus-wp-test-requires-uffd_feature_wp_hugetlbfs_shmem.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Edward Liaw edliaw@google.com Subject: selftests/mm: sigbus-wp test requires UFFD_FEATURE_WP_HUGETLBFS_SHMEM Date: Thu, 21 Mar 2024 23:20:21 +0000

The sigbus-wp test requires the UFFD_FEATURE_WP_HUGETLBFS_SHMEM flag for shmem and hugetlb targets. Otherwise it is not backwards compatible with kernels <5.19 and fails with EINVAL.

Link: https://lkml.kernel.org/r/20240321232023.2064975-1-edliaw@google.com Fixes: 73c1ea939b65 ("selftests/mm: move uffd sig/events tests into uffd unit tests") Signed-off-by: Edward Liaw edliaw@google.com Cc: Shuah Khan shuah@kernel.org Cc: Peter Xu <peterx@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

tools/testing/selftests/mm/uffd-unit-tests.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/mm/uffd-unit-tests.c~selftests-mm-sigbus-wp-test-requires-uffd_feature_wp_hugetlbfs_shmem +++ a/tools/testing/selftests/mm/uffd-unit-tests.c @@ -1427,7 +1427,8 @@ uffd_test_case_t uffd_tests[] = { .uffd_fn = uffd_sigbus_wp_test, .mem_targets = MEM_ALL, .uffd_feature_required = UFFD_FEATURE_SIGBUS | - UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP, + UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP | + UFFD_FEATURE_WP_HUGETLBFS_SHMEM, }, { .name = "events", _

Patches currently in -mm which might be from edliaw@google.com are

selftests-mm-sigbus-wp-test-requires-uffd_feature_wp_hugetlbfs_shmem.patch