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+ mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures on damon_test_split_regions_of() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: handle alloc failures on damon_test_split_regions_of() Date: Sat, 1 Nov 2025 11:20:02 -0700 damon_test_split_regions_of() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-9-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [5.15+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of +++ a/mm/damon/tests/core-kunit.h @@ -278,15 +278,35 @@ static void damon_test_split_regions_of( struct damon_target *t; struct damon_region *r; + if (!c) + kunit_skip("ctx alloc fail"); t = damon_new_target(); + if (!t) { + damon_destroy_ctx(c); + kunit_skip(test, "target alloc fail"); + } r = damon_new_region(0, 22); + if (!r) { + damon_destroy_ctx(c); + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } damon_add_region(r, t); damon_split_regions_of(t, 2, DAMON_MIN_REGION); KUNIT_EXPECT_LE(test, damon_nr_regions(t), 2u); damon_free_target(t); t = damon_new_target(); + if (!t) { + damon_destroy_ctx(c); + kunit_skip(test, "second target alloc fail"); + } r = damon_new_region(0, 220); + if (!r) { + damon_destroy_ctx(c); + damon_free_target(t); + kunit_skip(test, "second region alloc fail"); + } damon_add_region(r, t); damon_split_regions_of(t, 4, DAMON_MIN_REGION); KUNIT_EXPECT_LE(test, damon_nr_regions(t), 4u); _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

2 days, 6 hours

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+ mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures on dasmon_test_merge_regions_of() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: handle alloc failures on dasmon_test_merge_regions_of() Date: Sat, 1 Nov 2025 11:20:01 -0700 damon_test_merge_regions_of() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-8-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [5.15+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 6 ++++++ 1 file changed, 6 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of +++ a/mm/damon/tests/core-kunit.h @@ -248,8 +248,14 @@ static void damon_test_merge_regions_of( int i; t = damon_new_target(); + if (!t) + kunit_skip(test, "target alloc fail"); for (i = 0; i < ARRAY_SIZE(sa); i++) { r = damon_new_region(sa[i], ea[i]); + if (!r) { + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } r->nr_accesses = nrs[i]; r->nr_accesses_bp = nrs[i] * 10000; damon_add_region(r, t); _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

2 days, 6 hours

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+ mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures on damon_test_merge_two() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: handle alloc failures on damon_test_merge_two() Date: Sat, 1 Nov 2025 11:20:00 -0700 damon_test_merge_two() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-7-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [5.15+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two +++ a/mm/damon/tests/core-kunit.h @@ -188,11 +188,21 @@ static void damon_test_merge_two(struct int i; t = damon_new_target(); + if (!t) + kunit_skip(test, "target alloc fail"); r = damon_new_region(0, 100); + if (!r) { + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } r->nr_accesses = 10; r->nr_accesses_bp = 100000; damon_add_region(r, t); r2 = damon_new_region(100, 300); + if (!r2) { + damon_free_target(t); + kunit_skip(test, "second region alloc fail"); + } r2->nr_accesses = 20; r2->nr_accesses_bp = 200000; damon_add_region(r2, t); _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

2 days, 6 hours

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+ mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures on damon_test_split_at() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: handle alloc failures on damon_test_split_at() Date: Sat, 1 Nov 2025 11:19:59 -0700 damon_test_split_at() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-6-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [5.15+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at +++ a/mm/damon/tests/core-kunit.h @@ -148,8 +148,19 @@ static void damon_test_split_at(struct k struct damon_target *t; struct damon_region *r, *r_new; + if (!c) + kunit_skip(test, "ctx alloc fail"); t = damon_new_target(); + if (!t) { + damon_destroy_ctx(c); + kunit_skip(test, "target alloc fail"); + } r = damon_new_region(0, 100); + if (!r) { + damon_destroy_ctx(c); + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } r->nr_accesses_bp = 420000; r->nr_accesses = 42; r->last_nr_accesses = 15; _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

2 days, 6 hours

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+ mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle memory alloc failure from damon_test_aggregate() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: handle memory alloc failure from damon_test_aggregate() Date: Sat, 1 Nov 2025 11:19:58 -0700 damon_test_aggregate() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-5-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [5.15+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate +++ a/mm/damon/tests/core-kunit.h @@ -97,8 +97,15 @@ static void damon_test_aggregate(struct struct damon_region *r; int it, ir; + if (!ctx) + kunit_skip(test, "ctx alloc fail"); + for (it = 0; it < 3; it++) { t = damon_new_target(); + if (!t) { + damon_destroy_ctx(ctx); + kunit_skip(test, "target alloc fail"); + } damon_add_target(ctx, t); } @@ -106,6 +113,10 @@ static void damon_test_aggregate(struct damon_for_each_target(t, ctx) { for (ir = 0; ir < 3; ir++) { r = damon_new_region(saddr[it][ir], eaddr[it][ir]); + if (!r) { + damon_destroy_ctx(ctx); + kunit_skip(test, "region alloc fail"); + } r->nr_accesses = accesses[it][ir]; r->nr_accesses_bp = accesses[it][ir] * 10000; damon_add_region(r, t); _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

2 days, 6 hours

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+ mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle memory failure from damon_test_target() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: handle memory failure from damon_test_target() Date: Sat, 1 Nov 2025 11:19:57 -0700 damon_test_target() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-4-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [5.15+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 7 +++++++ 1 file changed, 7 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target +++ a/mm/damon/tests/core-kunit.h @@ -58,7 +58,14 @@ static void damon_test_target(struct kun struct damon_ctx *c = damon_new_ctx(); struct damon_target *t; + if (!c) + kunit_skip(test, "ctx alloc fail"); + t = damon_new_target(); + if (!t) { + damon_destroy_ctx(c); + kunit_skip(test, "target alloc fail"); + } KUNIT_EXPECT_EQ(test, 0u, nr_damon_targets(c)); damon_add_target(c, t); _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

2 days, 6 hours

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+ mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle allocation failures in damon_test_regions() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: handle allocation failures in damon_test_regions() Date: Sat, 1 Nov 2025 11:19:56 -0700 damon_test_regions() is assuming all dynamic memory allocation in it will succeed. Those are indeed likely in the real use cases since those allocations are too small to fail, but theoretically those could fail. In the case, inappropriate memory access can happen. Fix it by appropriately cleanup pre-allocated memory and skip the execution of the remaining tests in the failure cases. Link: https://lkml.kernel.org/r/20251101182021.74868-3-sj@kernel.org Fixes: 17ccae8bb5c9 ("mm/damon: add kunit tests") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [5.15+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 6 ++++++ 1 file changed, 6 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions +++ a/mm/damon/tests/core-kunit.h @@ -20,11 +20,17 @@ static void damon_test_regions(struct ku struct damon_target *t; r = damon_new_region(1, 2); + if (!r) + kunit_skip(test, "region alloc fail"); KUNIT_EXPECT_EQ(test, 1ul, r->ar.start); KUNIT_EXPECT_EQ(test, 2ul, r->ar.end); KUNIT_EXPECT_EQ(test, 0u, r->nr_accesses); t = damon_new_target(); + if (!t) { + damon_free_region(r); + kunit_skip(test, "target alloc fail"); + } KUNIT_EXPECT_EQ(test, 0u, damon_nr_regions(t)); damon_add_region(r, t); _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

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+ mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: fix memory leak in damon_test_set_filters_default_reject() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park <sj(a)kernel.org> Subject: mm/damon/tests/core-kunit: fix memory leak in damon_test_set_filters_default_reject() Date: Sat, 1 Nov 2025 11:19:55 -0700 Patch series "mm/damon/tests: fix memory bugs in kunit tests". DAMON kunit tests were initially written assuming those will be run on environments that are well controlled and therefore tolerant to transient test failures and bugs in the test code itself. The user-mode linux based manual run of the tests is one example of such an environment. And the test code was written for adding more test coverage as fast as possible, over making those safe and reliable. As a result, the tests resulted in having a number of bugs including real memory leaks, theoretical unhandled memory allocation failures, and unused memory allocations. The allocation failures that are not handled well are unlikely in the real world, since those allocations are too small to fail. But in theory, it can happen and cause inappropriate memory access. It is arguable if bugs in test code can really harm users. But, anyway bugs are bugs that need to be fixed. Fix the bugs one by one. Also Cc stable@ for the fixes of memory leak and unhandled memory allocation failures. The unused memory allocations are only a matter of memory efficiency, so not Cc-ing stable@. The first patch fixes memory leaks in the test code for the DAMON core layer. Following fifteen, three, and one patches respectively fix unhandled memory allocation failures in the test code for DAMON core layer, virtual address space DAMON operation set, and DAMON sysfs interface, one by one per test function. Final two patches remove memory allocations that are correctly deallocated at the end, but not really being used by any code. This patch (of 22): Kunit test function for damos_set_filters_default_reject() allocates two 'struct damos_filter' objects and not deallocates those, so that the memory for the two objects are leaked for every time the test runs. Fix this by deallocating those objects at the end of the test code. Link: https://lkml.kernel.org/r/20251101182021.74868-1-sj@kernel.org Link: https://lkml.kernel.org/r/20251101182021.74868-2-sj@kernel.org Fixes: 094fb14913c7 ("mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject()") Signed-off-by: SeongJae Park <sj(a)kernel.org> Cc: Brendan Higgins <brendan.higgins(a)linux.dev> Cc: David Gow <davidgow(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> [6.16+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 3 +++ 1 file changed, 3 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject +++ a/mm/damon/tests/core-kunit.h @@ -598,6 +598,9 @@ static void damon_test_set_filters_defau */ KUNIT_EXPECT_EQ(test, scheme.core_filters_default_reject, false); KUNIT_EXPECT_EQ(test, scheme.ops_filters_default_reject, true); + + damos_free_filter(anon_filter); + damos_free_filter(target_filter); } static struct kunit_case damon_test_cases[] = { _ Patches currently in -mm which might be from sj(a)kernel.org are mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch mm-damon-document-damos_quota_goal-nid-use-case.patch mm-damon-add-damos-quota-goal-type-for-per-memcg-per-node-memory-usage.patch mm-damon-core-implement-damos_quota_node_memcg_used_bp.patch mm-damon-sysfs-schemes-implement-path-file-under-quota-goal-directory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_used_bp.patch mm-damon-core-add-damos-quota-gaol-metric-for-per-memcg-per-numa-free-memory.patch mm-damon-sysfs-schemes-support-damos_quota_node_memcg_free_bp.patch docs-mm-damon-design-document-damos_quota_node_memcg_usedfree_bp.patch docs-admin-guide-mm-damon-usage-document-damos-quota-goal-path-file.patch docs-abi-damon-document-damos-quota-goal-path-file.patch mm-damon-core-fix-wrong-comment-of-damon_call-return-timing.patch docs-mm-damon-design-fix-wrong-link-to-intervals-goal-section.patch docs-admin-guide-mm-damon-stat-fix-a-typo-s-sampling-events-sampling-interval.patch docs-admin-guide-mm-damon-usage-document-empty-target-regions-commit-behavior.patch docs-admin-guide-mm-damon-reclaim-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-lru_sort-document-addr_unit-parameter.patch docs-admin-guide-mm-damon-stat-document-aggr_interval_us-parameter.patch docs-admin-guide-mm-damon-stat-document-negative-idle-time.patch mm-damon-core-add-damon_target-obsolete-for-pin-point-removal.patch mm-damon-sysfs-test-commit-input-against-realistic-destination.patch mm-damon-sysfs-implement-obsolete_target-file.patch docs-admin-guide-mm-damon-usage-document-obsolete_target-file.patch docs-abi-damon-document-obsolete_target-sysfs-file.patch selftests-damon-_damon_sysfs-support-obsolete_target-file.patch drgn_dump_damon_status-dump-damon_target-obsolete.patch sysfspy-extend-assert_ctx_committed-for-monitoring-targets.patch selftests-damon-sysfs-add-obsolete_target-test.patch mm-damon-tests-core-kunit-fix-memory-leak-in-damon_test_set_filters_default_reject.patch mm-damon-tests-core-kunit-handle-allocation-failures-in-damon_test_regions.patch mm-damon-tests-core-kunit-handle-memory-failure-from-damon_test_target.patch mm-damon-tests-core-kunit-handle-memory-alloc-failure-from-damon_test_aggregate.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_at.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_merge_two.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-dasmon_test_merge_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_split_regions_of.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions.patch mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.patch mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.patch mm-damon-tests-core-kunit-handle-alloc-failures-on-damon_test_set_filters_default_reject.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_do_test_apply_three_regions.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-in-damon_test_split_evenly_fail.patch mm-damon-tests-vaddr-kunit-handle-alloc-failures-on-damon_test_split_evenly_succ.patch mm-damon-tests-sysfs-kunit-handle-alloc-failures-on-damon_sysfs_test_add_targets.patch mm-damon-tests-core-kunit-remove-unnecessary-damon_ctx-variable-on-damon_test_split_at.patch mm-damon-tests-core-kunit-remove-unused-ctx-in-damon_test_split_regions_of.patch

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+ crash-fix-crashkernel-resource-shrink.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: crash: fix crashkernel resource shrink has been added to the -mm mm-hotfixes-unstable branch. Its filename is crash-fix-crashkernel-resource-shrink.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Sourabh Jain <sourabhjain(a)linux.ibm.com> Subject: crash: fix crashkernel resource shrink Date: Sun, 2 Nov 2025 01:07:41 +0530 When crashkernel is configured with a high reservation, shrinking its value below the low crashkernel reservation causes two issues: 1. Invalid crashkernel resource objects 2. Kernel crash if crashkernel shrinking is done twice For example, with crashkernel=200M,high, the kernel reserves 200MB of high memory and some default low memory (say 256MB). The reservation appears as: cat /proc/iomem | grep -i crash af000000-beffffff : Crash kernel 433000000-43f7fffff : Crash kernel If crashkernel is then shrunk to 50MB (echo 52428800 > /sys/kernel/kexec_crash_size), /proc/iomem still shows 256MB reserved: af000000-beffffff : Crash kernel Instead, it should show 50MB: af000000-b21fffff : Crash kernel Further shrinking crashkernel to 40MB causes a kernel crash with the following trace (x86): BUG: kernel NULL pointer dereference, address: 0000000000000038 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI <snip...> Call Trace: <TASK> ? __die_body.cold+0x19/0x27 ? page_fault_oops+0x15a/0x2f0 ? search_module_extables+0x19/0x60 ? search_bpf_extables+0x5f/0x80 ? exc_page_fault+0x7e/0x180 ? asm_exc_page_fault+0x26/0x30 ? __release_resource+0xd/0xb0 release_resource+0x26/0x40 __crash_shrink_memory+0xe5/0x110 crash_shrink_memory+0x12a/0x190 kexec_crash_size_store+0x41/0x80 kernfs_fop_write_iter+0x141/0x1f0 vfs_write+0x294/0x460 ksys_write+0x6d/0xf0 <snip...> This happens because __crash_shrink_memory()/kernel/crash_core.c incorrectly updates the crashk_res resource object even when crashk_low_res should be updated. Fix this by ensuring the correct crashkernel resource object is updated when shrinking crashkernel memory. Link: https://lkml.kernel.org/r/20251101193741.289252-1-sourabhjain@linux.ibm.com Fixes: 16c6006af4d4 ("kexec: enable kexec_crash_size to support two crash kernel regions") Signed-off-by: Sourabh Jain <sourabhjain(a)linux.ibm.com> Acked-by: Baoquan He <bhe(a)redhat.com> Cc: Zhen Lei <thunder.leizhen(a)huawei.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- kernel/crash_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/crash_core.c~crash-fix-crashkernel-resource-shrink +++ a/kernel/crash_core.c @@ -373,7 +373,7 @@ static int __crash_shrink_memory(struct old_res->start = 0; old_res->end = 0; } else { - crashk_res.end = ram_res->start - 1; + old_res->end = ram_res->start - 1; } crash_free_reserved_phys_range(ram_res->start, ram_res->end); _ Patches currently in -mm which might be from sourabhjain(a)linux.ibm.com are crash-fix-crashkernel-resource-shrink.patch crash-let-architecture-decide-crash-memory-export-to-iomem_resource.patch

2 days, 6 hours

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+ mm-swap-remove-duplicate-nr_swap_pages-decrement-in-get_swap_page_of_type.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: mm: swap: remove duplicate nr_swap_pages decrement in get_swap_page_of_type() has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-swap-remove-duplicate-nr_swap_pages-decrement-in-get_swap_page_of_type.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Youngjun Park <youngjun.park(a)lge.com> Subject: mm: swap: remove duplicate nr_swap_pages decrement in get_swap_page_of_type() Date: Sun, 2 Nov 2025 17:24:56 +0900 After commit 4f78252da887, nr_swap_pages is decremented in swap_range_alloc(). Since cluster_alloc_swap_entry() calls swap_range_alloc() internally, the decrement in get_swap_page_of_type() causes double-decrementing. Remove the duplicate decrement. Link: https://lkml.kernel.org/r/20251102082456.79807-1-youngjun.park@lge.com Fixes: 4f78252da887 ("mm: swap: move nr_swap_pages counter decrement from folio_alloc_swap() to swap_range_alloc()") Signed-off-by: Youngjun Park <youngjun.park(a)lge.com> Acked-by: Chris Li <chrisl(a)kernel.org> Reviewed-by: Barry Song <baohua(a)kernel.org> Reviewed-by: Kairui Song <kasong(a)tencent.com> Cc: Baoquan He <bhe(a)redhat.com> Cc: Kemeng Shi <shikemeng(a)huaweicloud.com> Cc: Nhat Pham <nphamcs(a)gmail.com> Cc: <stable(a)vger.kernel.org> [6.17+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/swapfile.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) --- a/mm/swapfile.c~mm-swap-remove-duplicate-nr_swap_pages-decrement-in-get_swap_page_of_type +++ a/mm/swapfile.c @@ -2005,10 +2005,8 @@ swp_entry_t get_swap_page_of_type(int ty local_lock(&percpu_swap_cluster.lock); offset = cluster_alloc_swap_entry(si, 0, 1); local_unlock(&percpu_swap_cluster.lock); - if (offset) { + if (offset) entry = swp_entry(si->type, offset); - atomic_long_dec(&nr_swap_pages); - } } put_swap_device(si); } _ Patches currently in -mm which might be from youngjun.park(a)lge.com are mm-swap-remove-duplicate-nr_swap_pages-decrement-in-get_swap_page_of_type.patch mm-swap-fix-memory-leak-in-setup_clusters-error-path.patch mm-swap-use-swp_solidstate-to-determine-if-swap-is-rotational.patch mm-swap-remove-redundant-comment-for-read_swap_cache_async.patch mm-swap-change-swap_alloc_slow-to-void.patch mm-swap-remove-scan_swap_map_slots-references-from-comments.patch

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