+ selftests-mm-sigbus-wp-test-requires-uffd_feature_wp_hugetlbfs_shmem.patch added to mm-hotfixes-unstable branch

+ selftests-mm-sigbus-wp-test-requires-uffd_feature_wp_hugetlbfs_shmem.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

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

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