From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BF1243793D3 for ; Tue, 17 Mar 2026 17:32:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773768758; cv=none; b=JNo2x7fxSGuQVbl7/qmht8rGxH/bihPQwiDMV9Mu8E5+YqGymzq+3NF0hrw0IqW1et0qwI0LzCn60QPKG2JGR7X7IKEw5mjNwYi5X8yw+m4x4+vIIpFgD6pEB4775KdNoAE75dGvJO/ay0rvPBI+EiEvBRCvh4Po2QFOSL1DnDo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773768758; c=relaxed/simple; bh=ca14dC/6GG9oY90yGmohRFDAFMSmgyMTEXazHpcGXR4=; h=Date:To:From:Subject:Message-Id; b=OV4cXTisLaHS+F0pITrXsziR5j+PC47UxbnTXHVB+wnMawEQtBISTwF+Em1P6oXimPjHO8MBOJAo3m7dt+R46ZCPSRy7bmYPbDmCxhvfeYqsE9D6stgzfB/yAly4KJy/HqzJPi5PLWfrBGScaNLCL+SWIMkZ6BSxwNDTop0j5ak= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=gU3UuTzg; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="gU3UuTzg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79292C4CEF7; Tue, 17 Mar 2026 17:32:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1773768758; bh=ca14dC/6GG9oY90yGmohRFDAFMSmgyMTEXazHpcGXR4=; h=Date:To:From:Subject:From; b=gU3UuTzgbt50eYvUvhTSnlQLAacUEeHLO6JZYmu1oO4zleITaOhR/xTRAcGINH4yZ OlmKiDBLzz/ozsS84xWOEuEDef9FJu7FTUPSkujyjsspmwNJ53bYGab0M5tGhx5O4D PqYchR4pcwDv3biGJFpPKRacAkFA4/shlN7oOxwY= Date: Tue, 17 Mar 2026 10:32:37 -0700 To: mm-commits@vger.kernel.org,yangyingliang@huawei.com,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-damon-core-support-addr_unit-on-damon_find_biggest_system_ram-fix.patch added to mm-unstable branch Message-Id: <20260317173238.79292C4CEF7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/damon/core: verify found biggest system ram has been added to the -mm mm-unstable branch. Its filename is mm-damon-core-support-addr_unit-on-damon_find_biggest_system_ram-fix.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-core-support-addr_unit-on-damon_find_biggest_system_ram-fix.patch This patch will later appear in the mm-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 various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: SeongJae Park Subject: mm/damon/core: verify found biggest system ram Date: Mon, 16 Mar 2026 23:32:48 -0700 On 32 bit systems having PAE (>4 GiB physical memory address sapce), the final start and end address could overflow, resulting in returning an invalid address range. Verify the returning region. Also remove the resource validation after walk_system_ram_res(), since the validation means not a lot. Link: https://lkml.kernel.org/r/20260317144725.88524-1-sj@kernel.org Signed-off-by: SeongJae Park Cc: Yang yingliang Signed-off-by: Andrew Morton --- mm/damon/core.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/mm/damon/core.c~mm-damon-core-support-addr_unit-on-damon_find_biggest_system_ram-fix +++ a/mm/damon/core.c @@ -3089,11 +3089,10 @@ static bool damon_find_biggest_system_ra struct resource res = {}; walk_system_ram_res(0, -1, &res, walk_system_ram); - if (res.end < res.start) - return false; - *start = damon_res_to_core_addr(res.start, addr_unit); *end = damon_res_to_core_addr(res.end + 1, addr_unit); + if (*end <= *start) + return false; return true; } _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-stat-monitor-all-system-ram-resources.patch mm-damon-core-set-quota-score-histogram-with-core-filters.patch mm-damon-core-do-non-safe-region-walk-on-kdamond_apply_schemes.patch mm-damon-core-split-regions-for-min_nr_regions.patch mm-damon-vaddr-do-not-split-regions-for-min_nr_regions.patch mm-damon-test-core-kunit-add-damon_apply_min_nr_regions-test.patch mm-damon-add-config_damon_debug_sanity.patch mm-damon-core-add-damon_new_region-debug_sanity-check.patch mm-damon-core-add-damon_del_region-debug_sanity-check.patch mm-damon-core-add-damon_nr_regions-debug_sanity-check.patch mm-damon-core-add-damon_merge_two_regions-debug_sanity-check.patch mm-damon-core-add-damon_merge_regions_of-debug_sanity-check.patch mm-damon-core-add-damon_split_region_at-debug_sanity-check.patch mm-damon-core-add-damon_reset_aggregated-debug_sanity-check.patch mm-damon-tests-kunitconifg-enable-damon_debug_sanity.patch selftests-damon-config-enable-damon_debug_sanity.patch mm-damon-tests-core-kunit-add-a-test-for-damon_commit_ctx.patch docs-mm-damon-design-document-the-power-of-two-limitation-for-addr_unit.patch mm-damon-core-remove-damos_set_next_apply_sis-duplicates.patch mm-damon-core-use-time_before-for-next_apply_sis.patch mm-damon-core-use-time_after_eq-in-kdamond_fn.patch mm-damon-core-use-mult_frac.patch mm-damon-tests-core-kunit-add-a-test-for-damon_is_last_region.patch mm-damon-core-clarify-damon_set_attrs-usages.patch mm-damon-document-non-zero-length-damon_region-assumption.patch docs-admin-guide-mm-damn-lru_sort-fix-intervals-autotune-parameter-name.patch docs-mm-damon-maintainer-profile-use-flexible-review-cadence.patch docs-mm-damon-index-fix-typo-autoamted-automated.patch mm-damon-core-introduce-damos_quota_goal_tuner.patch mm-damon-core-allow-quota-goals-set-zero-effective-size-quota.patch mm-damon-core-introduce-damos_quota_goal_tuner_temporal.patch mm-damon-sysfs-schemes-implement-quotas-goal_tuner-file.patch docs-mm-damon-design-document-the-goal-based-quota-tuner-selections.patch docs-admin-guide-mm-damon-usage-document-goal_tuner-sysfs-file.patch docs-abi-damon-update-for-goal_tuner.patch mm-damon-tests-core-kunit-test-goal_tuner-commit.patch selftests-damon-_damon_sysfs-support-goal_tuner-setup.patch selftests-damon-drgn_dump_damon_status-support-quota-goal_tuner-dumping.patch selftests-damon-sysfspy-test-goal_tuner-commit.patch mm-damon-core-fix-wrong-end-address-assignment-on-walk_system_ram.patch mm-damon-core-support-addr_unit-on-damon_find_biggest_system_ram.patch mm-damon-core-support-addr_unit-on-damon_find_biggest_system_ram-fix.patch mm-damon-core-receive-addr_unit-on-damon_set_region_biggest_system_ram_default.patch mm-damon-core-receive-addr_unit-on-damon_set_region_biggest_system_ram_default-fix.patch mm-damon-reclaim-respect-addr_unit-on-default-monitoring-region-setup.patch mm-damon-lru_sort-respect-addr_unit-on-default-monitoring-region-setup.patch