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

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures on damos_test_filter_out() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-on-damos_test_filter_out.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 damos_test_filter_out() Date: Sat, 1 Nov 2025 11:20:09 -0700 damon_test_filter_out() 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/20251101182021.74868-16-sj@kernel.org Fixes: 26713c890875 ("mm/damon/core-test: add a unit test for __damos_filter_out()") 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> [6.6+] 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-damos_test_filter_out +++ a/mm/damon/tests/core-kunit.h @@ -542,11 +542,22 @@ static void damos_test_filter_out(struct struct damos_filter *f; f = damos_new_filter(DAMOS_FILTER_TYPE_ADDR, true, false); + if (!f) + kunit_skip(test, "filter alloc fail"); f->addr_range = (struct damon_addr_range){ .start = DAMON_MIN_REGION * 2, .end = DAMON_MIN_REGION * 6}; t = damon_new_target(); + if (!t) { + damos_destroy_filter(f); + kunit_skip(test, "target alloc fail"); + } r = damon_new_region(DAMON_MIN_REGION * 3, DAMON_MIN_REGION * 5); + if (!r) { + damos_destroy_filter(f); + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } damon_add_region(r, t); /* region in the range */ _ 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

1 week, 6 days

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

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failure on damos_test_commit_filter() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter.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 failure on damos_test_commit_filter() Date: Sat, 1 Nov 2025 11:20:08 -0700 damon_test_commit_filter() 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/20251101182021.74868-15-sj@kernel.org Fixes: f6a4a150f1ec ("mm/damon/tests/core-kunit: add damos_commit_filter test") 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> [6.18+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-alloc-failure-on-damos_test_commit_filter +++ a/mm/damon/tests/core-kunit.h @@ -516,11 +516,16 @@ static void damos_test_new_filter(struct static void damos_test_commit_filter(struct kunit *test) { - struct damos_filter *src_filter = damos_new_filter( - DAMOS_FILTER_TYPE_ANON, true, true); - struct damos_filter *dst_filter = damos_new_filter( - DAMOS_FILTER_TYPE_ACTIVE, false, false); + struct damos_filter *src_filter, *dst_filter; + src_filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true, true); + if (!src_filter) + kunit_skip(test, "src filter alloc fail"); + dst_filter = damos_new_filter(DAMOS_FILTER_TYPE_ACTIVE, false, false); + if (!dst_filter) { + damos_destroy_filter(src_filter); + kunit_skip(test, "dst filter alloc fail"); + } damos_commit_filter(dst_filter, src_filter); KUNIT_EXPECT_EQ(test, dst_filter->type, src_filter->type); KUNIT_EXPECT_EQ(test, dst_filter->matching, src_filter->matching); _ 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

1 week, 6 days

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+ mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failres in damon_test_new_filter() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter.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 failres in damon_test_new_filter() Date: Sat, 1 Nov 2025 11:20:07 -0700 damon_test_new_filter() 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/20251101182021.74868-14-sj@kernel.org Fixes: 2a158e956b98 ("mm/damon/core-test: add a test for damos_new_filter()") 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> [6.6+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-alloc-failres-in-damon_test_new_filter +++ a/mm/damon/tests/core-kunit.h @@ -505,6 +505,8 @@ static void damos_test_new_filter(struct struct damos_filter *filter; filter = damos_new_filter(DAMOS_FILTER_TYPE_ANON, true, false); + if (!filter) + kunit_skip(test, "filter alloc fail"); KUNIT_EXPECT_EQ(test, filter->type, DAMOS_FILTER_TYPE_ANON); KUNIT_EXPECT_EQ(test, filter->matching, true); KUNIT_EXPECT_PTR_EQ(test, filter->list.prev, &filter->list); _ 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

1 week, 6 days

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

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failure on damon_test_set_attrs() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failure-on-damon_test_set_attrs.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 failure on damon_test_set_attrs() Date: Sat, 1 Nov 2025 11:20:06 -0700 damon_test_set_attrs() 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/20251101182021.74868-13-sj@kernel.org Fixes: aa13779be6b7 ("mm/damon/core-test: add a test for damon_set_attrs()") 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> [6.5+] 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-handle-alloc-failure-on-damon_test_set_attrs +++ a/mm/damon/tests/core-kunit.h @@ -465,6 +465,9 @@ static void damon_test_set_attrs(struct .sample_interval = 5000, .aggr_interval = 100000,}; struct damon_attrs invalid_attrs; + if (!c) + kunit_skip(test, "ctx alloc fail"); + KUNIT_EXPECT_EQ(test, damon_set_attrs(c, &valid_attrs), 0); invalid_attrs = valid_attrs; _ 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-handle-alloc-failures-in-damon_test_update_monitoring_result.patch added to mm-new branch

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures in damon_test_update_monitoring_result() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_update_monitoring_result.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 in damon_test_update_monitoring_result() Date: Sat, 1 Nov 2025 11:20:05 -0700 damon_test_update_monitoring_result() 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/20251101182021.74868-12-sj@kernel.org Fixes: f4c978b6594b ("mm/damon/core-test: add a test for damon_update_monitoring_results()") 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> [6.3+] 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-handle-alloc-failures-in-damon_test_update_monitoring_result +++ a/mm/damon/tests/core-kunit.h @@ -429,6 +429,9 @@ static void damon_test_update_monitoring struct damon_attrs new_attrs; struct damon_region *r = damon_new_region(3, 7); + if (!r) + kunit_skip(test, "region alloc fail"); + r->nr_accesses = 15; r->nr_accesses_bp = 150000; r->age = 20; _ 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

1 week, 6 days

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

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures in damon_test_set_regions() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_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 alloc failures in damon_test_set_regions() Date: Sat, 1 Nov 2025 11:20:04 -0700 damon_test_set_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/20251101182021.74868-11-sj@kernel.org Fixes: 62f409560eb2 ("mm/damon/core-test: test damon_set_regions") 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> [6.1+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/damon/tests/core-kunit.h | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) --- a/mm/damon/tests/core-kunit.h~mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_set_regions +++ a/mm/damon/tests/core-kunit.h @@ -368,13 +368,26 @@ static void damon_test_ops_registration( static void damon_test_set_regions(struct kunit *test) { struct damon_target *t = damon_new_target(); - struct damon_region *r1 = damon_new_region(4, 16); - struct damon_region *r2 = damon_new_region(24, 32); + struct damon_region *r1, *r2; struct damon_addr_range range = {.start = 8, .end = 28}; unsigned long expects[] = {8, 16, 16, 24, 24, 28}; int expect_idx = 0; struct damon_region *r; + if (!t) + kunit_skip(test, "target alloc fail"); + r1 = damon_new_region(4, 16); + if (!r1) { + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } + r2 = damon_new_region(24, 32); + if (!r2) { + damon_free_target(t); + damon_free_region(r1); + kunit_skip(test, "second region alloc fail"); + } + damon_add_region(r1, t); damon_add_region(r2, t); damon_set_regions(t, &range, 1, DAMON_MIN_REGION); _ 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

1 week, 6 days

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

by Andrew Morton

The patch titled Subject: mm/damon/tests/core-kunit: handle alloc failures in damon_test_ops_registration() has been added to the -mm mm-new branch. Its filename is mm-damon-tests-core-kunit-handle-alloc-failures-in-damon_test_ops_registration.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 in damon_test_ops_registration() Date: Sat, 1 Nov 2025 11:20:03 -0700 damon_test_ops_registration() 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/20251101182021.74868-10-sj@kernel.org Fixes: 4f540f5ab4f2 ("mm/damon/core-test: add a kunit test case for ops registration") 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> [5.19+] 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-handle-alloc-failures-in-damon_test_ops_registration +++ a/mm/damon/tests/core-kunit.h @@ -320,6 +320,9 @@ static void damon_test_ops_registration( struct damon_operations ops = {.id = DAMON_OPS_VADDR}, bak; bool need_cleanup = false; + if (!c) + kunit_skip(test, "ctx alloc fail"); + /* DAMON_OPS_VADDR is registered only if CONFIG_DAMON_VADDR is set */ if (!damon_is_registered_ops(DAMON_OPS_VADDR)) { bak.id = DAMON_OPS_VADDR; _ 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

1 week, 6 days

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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

1 week, 6 days

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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

1 week, 6 days

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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

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