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 8DCA02E36FA; Fri, 25 Jul 2025 02:15:49 +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=1753409749; cv=none; b=GXkf6H5S+sIrCxtyBm2GIGNnow8U5OwmmGK/UK9/VseRcpaPibpIGGxGahLKbIjxOWLF5B4LoGmBRYDUhkFW4m7oFb4jT+BDmPh7ixRMEcbSt3Kt4q7gAoSS2TUQekdj1eCgUruse5S5N/loABVyYlA/mAOKL1PlmoBV2ceXimk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753409749; c=relaxed/simple; bh=LRzcVhGmtO9fSerVc3HgTOVBHk9O6k0wwi2UywaOkQQ=; h=Date:To:From:Subject:Message-Id; b=JteiE/XtKsIykm7Yxj4Y/2MY6f8mRSn2ad++MDNbytJAiUQ5UYXANfkJ+AKxHq4OrpJN+0K9BS9rveCDXx8OVV3G3cAchiibvT5RAdyqtVTCdRTnrDu4/FtO6si7DPOTNglfWLQrL/i2Us0MveejuWlE2b14GBwx6+oKBcnj/sg= 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=YyxeUSer; 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="YyxeUSer" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 612C0C4CEED; Fri, 25 Jul 2025 02:15:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1753409749; bh=LRzcVhGmtO9fSerVc3HgTOVBHk9O6k0wwi2UywaOkQQ=; h=Date:To:From:Subject:From; b=YyxeUSerdi0uQmZgp1FzQ28+/Dz5eBgo33ytWHMNHYPV6/utJnXgTv1n8lcBiUNS1 CWiz73CRQiaXAr6YWiflNv6JnDTmnMLErmngv2Kj4Xo8SguELf3w/J/IWDdOVbV0U0 7tWesLYFAPh+Nd9YBFWSGGZROFPZcPHsBqe1H518= Date: Thu, 24 Jul 2025 19:15:48 -0700 To: mm-commits@vger.kernel.org,stable@vger.kernel.org,joshua.hahnjy@gmail.com,hyeongtak.ji@sk.com,honggyu.kim@sk.com,sj@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-damon-ops-common-ignore-migration-request-to-invalid-nodes.patch removed from -mm tree Message-Id: <20250725021549.612C0C4CEED@smtp.kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm/damon/ops-common: ignore migration request to invalid nodes has been removed from the -mm tree. Its filename was mm-damon-ops-common-ignore-migration-request-to-invalid-nodes.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: SeongJae Park Subject: mm/damon/ops-common: ignore migration request to invalid nodes Date: Sun, 20 Jul 2025 11:58:22 -0700 damon_migrate_pages() tries migration even if the target node is invalid. If users mistakenly make such invalid requests via DAMOS_MIGRATE_{HOT,COLD} action, the below kernel BUG can happen. [ 7831.883495] BUG: unable to handle page fault for address: 0000000000001f48 [ 7831.884160] #PF: supervisor read access in kernel mode [ 7831.884681] #PF: error_code(0x0000) - not-present page [ 7831.885203] PGD 0 P4D 0 [ 7831.885468] Oops: Oops: 0000 [#1] SMP PTI [ 7831.885852] CPU: 31 UID: 0 PID: 94202 Comm: kdamond.0 Not tainted 6.16.0-rc5-mm-new-damon+ #93 PREEMPT(voluntary) [ 7831.886913] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-4.el9 04/01/2014 [ 7831.887777] RIP: 0010:__alloc_frozen_pages_noprof (include/linux/mmzone.h:1724 include/linux/mmzone.h:1750 mm/page_alloc.c:4936 mm/page_alloc.c:5137) [...] [ 7831.895953] Call Trace: [ 7831.896195] [ 7831.896397] __folio_alloc_noprof (mm/page_alloc.c:5183 mm/page_alloc.c:5192) [ 7831.896787] migrate_pages_batch (mm/migrate.c:1189 mm/migrate.c:1851) [ 7831.897228] ? __pfx_alloc_migration_target (mm/migrate.c:2137) [ 7831.897735] migrate_pages (mm/migrate.c:2078) [ 7831.898141] ? __pfx_alloc_migration_target (mm/migrate.c:2137) [ 7831.898664] damon_migrate_folio_list (mm/damon/ops-common.c:321 mm/damon/ops-common.c:354) [ 7831.899140] damon_migrate_pages (mm/damon/ops-common.c:405) [...] Add a target node validity check in damon_migrate_pages(). The validity check is stolen from that of do_pages_move(), which is being used for the move_pages() system call. Link: https://lkml.kernel.org/r/20250720185822.1451-1-sj@kernel.org Fixes: b51820ebea65 ("mm/damon/paddr: introduce DAMOS_MIGRATE_COLD action for demotion") [6.11.x] Signed-off-by: SeongJae Park Reviewed-by: Joshua Hahn Cc: Honggyu Kim Cc: Hyeongtak Ji Cc: Signed-off-by: Andrew Morton --- mm/damon/ops-common.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/mm/damon/ops-common.c~mm-damon-ops-common-ignore-migration-request-to-invalid-nodes +++ a/mm/damon/ops-common.c @@ -383,6 +383,10 @@ unsigned long damon_migrate_pages(struct if (list_empty(folio_list)) return nr_migrated; + if (target_nid < 0 || target_nid >= MAX_NUMNODES || + !node_state(target_nid, N_MEMORY)) + return nr_migrated; + noreclaim_flag = memalloc_noreclaim_save(); nid = folio_nid(lru_to_folio(folio_list)); _ Patches currently in -mm which might be from sj@kernel.org are selftests-damon-sysfspy-stop-damon-for-dumping-failures.patch selftests-damon-_damon_sysfs-support-damos-watermarks-setup.patch selftests-damon-_damon_sysfs-support-damos-filters-setup.patch selftests-damon-_damon_sysfs-support-monitoring-intervals-goal-setup.patch selftests-damon-_damon_sysfs-support-damos-quota-weights-setup.patch selftests-damon-_damon_sysfs-support-damos-quota-goal-nid-setup.patch selftests-damon-_damon_sysfs-support-damos-action-dests-setup.patch selftests-damon-_damon_sysfs-support-damos-target_nid-setup.patch selftests-damon-_damon_sysfs-use-232-1-as-max-nr_accesses-and-age.patch selftests-damon-drgn_dump_damon_status-dump-damos-migrate_dests.patch selftests-damon-drgn_dump_damon_status-dump-ctx-opsid.patch selftests-damon-drgn_dump_damon_status-dump-damos-filters.patch selftests-damon-sysfspy-generalize-damos-watermarks-commit-assertion.patch selftests-damon-sysfspy-generalize-damosquota-commit-assertion.patch selftests-damon-sysfspy-test-quota-goal-commitment.patch selftests-damon-sysfspy-test-damos-destinations-commitment.patch selftests-damon-sysfspy-generalize-damos-scheme-commit-assertion.patch selftests-damon-sysfspy-test-damos-filters-commitment.patch selftests-damon-sysfspy-generalize-damos-schemes-commit-assertion.patch selftests-damon-sysfspy-generalize-monitoring-attributes-commit-assertion.patch selftests-damon-sysfspy-generalize-damon-context-commit-assertion.patch selftests-damon-sysfspy-test-non-default-parameters-runtime-commit.patch selftests-damon-sysfspy-test-runtime-reduction-of-damon-parameters.patch