This is a note to let you know that I've just added the patch titled
selftests/mm: uffd-unit-test check if huge page size is 0
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-mm-uffd-unit-test-check-if-huge-page-size-is-0.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7efa6f2c803366f84c3c362f01e822490669d72b Mon Sep 17 00:00:00 2001
From: Terry Tritton <terry.tritton@xxxxxxxxxx>
Date: Mon, 5 Feb 2024 14:50:56 +0000
Subject: selftests/mm: uffd-unit-test check if huge page size is 0
From: Terry Tritton <terry.tritton@xxxxxxxxxx>
commit 7efa6f2c803366f84c3c362f01e822490669d72b upstream.
If HUGETLBFS is not enabled then the default_huge_page_size function will
return 0 and cause a divide by 0 error. Add a check to see if the huge page
size is 0 and skip the hugetlb tests if it is.
Link: https://lkml.kernel.org/r/20240205145055.3545806-2-terry.tritton@xxxxxxxxxx
Fixes: 16a45b57cbf2 ("selftests/mm: add framework for uffd-unit-test")
Signed-off-by: Terry Tritton <terry.tritton@xxxxxxxxxx>
Cc: Peter Griffin <peter.griffin@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/uffd-unit-tests.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/tools/testing/selftests/mm/uffd-unit-tests.c
+++ b/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -1309,6 +1309,12 @@ int main(int argc, char *argv[])
continue;
uffd_test_start("%s on %s", test->name, mem_type->name);
+ if ((mem_type->mem_flag == MEM_HUGETLB ||
+ mem_type->mem_flag == MEM_HUGETLB_PRIVATE) &&
+ (default_huge_page_size() == 0)) {
+ uffd_test_skip("huge page size is 0, feature missing?");
+ continue;
+ }
if (!uffd_feature_supported(test)) {
uffd_test_skip("feature missing");
continue;
Patches currently in stable-queue which might be from terry.tritton@xxxxxxxxxx are
queue-6.6/selftests-mm-uffd-unit-test-check-if-huge-page-size-is-0.patch
