From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 44B4D2EEE76 for ; Thu, 8 Oct 2026 03:12:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791429156; cv=none; b=r0oE+V199RZFVEUi5hIaxV3W7+czbsHNyBxJVGn2KVVaaKH+qfcOW64a+BopnxZCJezTVdRshn5l0CrWfbpGLsY9nM28aWr6EXggXQgIToYcYgRbCTLnMnOix0x8hpOBaNNHJujJckkG2KT0OrZ7NuoXMfacv0CHg8vJl4+hCyg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791429156; c=relaxed/simple; bh=0WtJGUa2Ei1qT4G2+P8o7gdOU6/Tk4RPwU5TXDvYfXU=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=msemjNQ+oPQjjFFTj6EepAY/z/eiOFvgFE2YKki8YN3MKFDQxgjeGcRFFprhtyeaI43Nhy439ZXtVrt1WZCMe0+GYrLUCGENecjKnkHYLdP2J0+KiFdoAYq2Q634R+621aBcIA0aq0kvaNIA227cC7UR2KHHCXg3g9qZMxNLkuE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f197.google.com with SMTP id 5614622812f47-4cc89e86e4dso4289689b6e.2 for ; Wed, 07 Oct 2026 20:12:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791429153; x=1792033953; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=k4GFIqZuYztypf5nVdacwFxbDWwpq1vZGFNBg/M0eKc=; b=b+hp+CByIF6sCKT13KA7ROqmLT6+86BlKuEGgGHtmipR7WxpKo3F9l0TEeChWTtExb N0xCxapFOtRLHm6g1Cg7vJkcss2juafp9Tt6GGp9He95Pp1cy/dWtu7iV1zfPYEXIQXm R2E+gUOS7CHe71/SZlIVo6etjrb5fk2NYLx8tHKXUqI65uS3cq5EbMAubKExRTv14cfs ZikthxO9EMQs1xBTdiEA8ihI5moJD7emsSpxxxYW2huakK4VuCRRwe5B8JyzAod5Pxdj fmoLkm8COUWbUSfPtEpRegnhF2vT/Mjzn9wmbQihVjAJ2BpAGXS9iwbnXQYvck9qT9vt 2OHA== X-Forwarded-Encrypted: i=1; AKwUvBxxsvXrqsW9uHV+fk5kCu1/ebK9xSvlMriQuc3RyblQ0tF8jlolvNDMJVvTr1oMRmZ+NCW+6FWUaSe7uyA=@vger.kernel.org X-Gm-Message-State: AFuF++npdIavwGZFK5LRepw2BhWHQb/ZlK8Kjz/ljf60eJJalXHEdW05 RpLNSsIpbSmJY55Rwi+R+mypadVe66IzWFc4wwmIGiIQ6LvuwlJ3N75B5wYBFe+vp82n2uPPULh R0AwEC9qCF9Hm3sjZ5CtL7SEcgEODfx7ejjf2RDuGPMHXz7Aj3ATcI9Dkfsw= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:138e:b0:4d6:9113:25b0 with SMTP id 5614622812f47-4fc4739b36emr4054169b6e.51.1791429152951; Wed, 07 Oct 2026 20:12:32 -0700 (PDT) Date: Wed, 07 Oct 2026 20:12:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ac70a20.a36481ec.1ba24c.0006.GAE@google.com> Subject: [syzbot] [acpica?] KASAN: slab-use-after-free Read in acpi_ns_check_package_list From: syzbot To: acpica-devel@lists.linux.dev, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, rafael@kernel.org, robert.moore@intel.com, saket.dumbre@intel.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f5098b6bae76 Linux 7.2-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10dfc6b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f221a1b5d497ed15 dashboard link: https://syzkaller.appspot.com/bug?extid=eb4f9a996f9ad47f435d compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f5098b6b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/29f89292ccd5/vmlinux-f5098b6b.xz kernel image: https://storage.googleapis.com/syzbot-assets/6b54f72b862e/bzImage-f5098b6b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+eb4f9a996f9ad47f435d@syzkaller.appspotmail.com ACPI Error: AE_NO_MEMORY, Could not update object reference count (20260408/utdelete-651) ================================================================== BUG: KASAN: slab-use-after-free in acpi_ns_check_object_type+0x5c8/0x760 drivers/acpi/acpica/nspredef.c:202 Read of size 1 at addr ffff888020923688 by task kworker/u33:8/1163 CPU: 3 UID: 0 PID: 1163 Comm: kworker/u33:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: async async_run_entry_fn Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 acpi_ns_check_object_type+0x5c8/0x760 drivers/acpi/acpica/nspredef.c:202 acpi_ns_check_package_list+0x6c6/0xaf0 drivers/acpi/acpica/nsprepkg.c:495 acpi_ns_check_package+0xac4/0x1740 drivers/acpi/acpica/nsprepkg.c:295 acpi_ns_check_return_value+0x38d/0x420 drivers/acpi/acpica/nspredef.c:136 acpi_ns_evaluate+0x69e/0x1670 drivers/acpi/acpica/nseval.c:261 acpi_ut_evaluate_object+0xf7/0x610 drivers/acpi/acpica/uteval.c:60 acpi_rs_get_prt_method_data+0xa0/0x150 drivers/acpi/acpica/rsutils.c:446 acpi_get_irq_routing_table+0xb8/0x140 drivers/acpi/acpica/rsxface.c:137 acpi_pci_irq_find_prt_entry+0x179/0xdd0 drivers/acpi/pci_irq.c:215 acpi_pci_irq_lookup+0x8e/0x6b0 drivers/acpi/pci_irq.c:299 acpi_pci_irq_enable+0x1f5/0x6f0 drivers/acpi/pci_irq.c:414 pcibios_enable_device+0xb6/0xe0 arch/x86/pci/common.c:699 do_pci_enable_device+0x21f/0x4a0 drivers/pci/pci.c:1998 pci_enable_device_flags+0x27c/0x370 drivers/pci/pci.c:2089 usb_hcd_pci_probe+0x56/0xcb0 drivers/usb/core/hcd-pci.c:184 ehci_pci_probe+0x35/0x50 drivers/usb/host/ehci-pci.c:385 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:332 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:394 __pci_device_probe drivers/pci/pci-driver.c:455 [inline] pci_device_probe+0x1cd/0x370 drivers/pci/pci-driver.c:489 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach_async_helper+0x1d1/0x2b0 drivers/base/dd.c:1055 async_run_entry_fn+0x9f/0x580 kernel/async.c:129 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 1: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4584 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x26b/0x6a0 mm/slub.c:4931 acpi_ut_allocate_object_desc_dbg+0x86/0x240 drivers/acpi/acpica/utobject.c:359 acpi_ut_create_internal_object_dbg+0x51/0x260 drivers/acpi/acpica/utobject.c:69 acpi_ds_build_internal_object+0x173/0x790 drivers/acpi/acpica/dsobject.c:94 acpi_ds_build_internal_package_obj+0x481/0xe60 drivers/acpi/acpica/dspkginit.c:202 acpi_ds_eval_data_object_operands+0x2fd/0x640 drivers/acpi/acpica/dsopcode.c:638 acpi_ds_exec_end_op+0xe41/0x1e60 drivers/acpi/acpica/dswexec.c:617 acpi_ps_parse_loop+0x5e1/0x26e0 drivers/acpi/acpica/psloop.c:553 acpi_ps_parse_aml+0x81e/0x1120 drivers/acpi/acpica/psparse.c:489 acpi_ps_execute_table+0x393/0x500 drivers/acpi/acpica/psxface.c:295 acpi_ns_execute_table+0x596/0x970 drivers/acpi/acpica/nsparse.c:116 acpi_ns_parse_table+0xcb/0x160 drivers/acpi/acpica/nsparse.c:268 acpi_ns_load_table+0xc9/0x490 drivers/acpi/acpica/nsload.c:71 acpi_tb_load_namespace+0x2b0/0x8f0 drivers/acpi/acpica/tbxfload.c:158 acpi_load_tables+0x89/0x160 drivers/acpi/acpica/tbxfload.c:59 acpi_bus_init drivers/acpi/bus.c:1479 [inline] acpi_init+0x146/0x840 drivers/acpi/bus.c:1592 do_one_initcall+0x11d/0x700 init/main.c:1347 do_initcall_level init/main.c:1409 [inline] do_initcalls init/main.c:1425 [inline] do_basic_setup init/main.c:1445 [inline] kernel_init_freeable+0x6ea/0x7b0 init/main.c:1658 kernel_init+0x1f/0x1e0 init/main.c:1548 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 1163: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2677 [inline] slab_free mm/slub.c:6377 [inline] kmem_cache_free+0x127/0x6b0 mm/slub.c:6504 acpi_os_release_object+0x1c/0x30 drivers/acpi/osl.c:1661 acpi_ut_delete_object_desc+0xea/0x130 drivers/acpi/acpica/utobject.c:402 acpi_ut_delete_internal_obj drivers/acpi/acpica/utdelete.c:316 [inline] acpi_ut_update_ref_count.part.0+0x510/0x2250 drivers/acpi/acpica/utdelete.c:436 acpi_ut_update_ref_count drivers/acpi/acpica/utdelete.c:374 [inline] acpi_ut_update_object_reference+0x258/0x800 drivers/acpi/acpica/utdelete.c:553 acpi_ut_remove_reference drivers/acpi/acpica/utdelete.c:740 [inline] acpi_ut_remove_reference+0x192/0x1d0 drivers/acpi/acpica/utdelete.c:710 acpi_ds_clear_implicit_return drivers/acpi/acpica/dsutils.c:55 [inline] acpi_ds_clear_implicit_return+0x137/0x220 drivers/acpi/acpica/dsutils.c:34 acpi_ds_exec_end_control_op+0x319/0xf60 drivers/acpi/acpica/dscontrol.c:226 acpi_ds_exec_end_op+0xff7/0x1e60 drivers/acpi/acpica/dswexec.c:462 acpi_ps_parse_loop+0x5e1/0x26e0 drivers/acpi/acpica/psloop.c:553 acpi_ps_parse_aml+0x81e/0x1120 drivers/acpi/acpica/psparse.c:489 acpi_ps_execute_method+0x5c4/0xe90 drivers/acpi/acpica/psxface.c:190 acpi_ns_evaluate+0x640/0x1670 drivers/acpi/acpica/nseval.c:205 acpi_ut_evaluate_object+0xf7/0x610 drivers/acpi/acpica/uteval.c:60 acpi_rs_get_prt_method_data+0xa0/0x150 drivers/acpi/acpica/rsutils.c:446 acpi_get_irq_routing_table+0xb8/0x140 drivers/acpi/acpica/rsxface.c:137 acpi_pci_irq_find_prt_entry+0x179/0xdd0 drivers/acpi/pci_irq.c:215 acpi_pci_irq_lookup+0x8e/0x6b0 drivers/acpi/pci_irq.c:299 acpi_pci_irq_enable+0x1f5/0x6f0 drivers/acpi/pci_irq.c:414 pcibios_enable_device+0xb6/0xe0 arch/x86/pci/common.c:699 do_pci_enable_device+0x21f/0x4a0 drivers/pci/pci.c:1998 pci_enable_device_flags+0x27c/0x370 drivers/pci/pci.c:2089 usb_hcd_pci_probe+0x56/0xcb0 drivers/usb/core/hcd-pci.c:184 ehci_pci_probe+0x35/0x50 drivers/usb/host/ehci-pci.c:385 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:332 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:394 __pci_device_probe drivers/pci/pci-driver.c:455 [inline] pci_device_probe+0x1cd/0x370 drivers/pci/pci-driver.c:489 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach_async_helper+0x1d1/0x2b0 drivers/base/dd.c:1055 async_run_entry_fn+0x9f/0x580 kernel/async.c:129 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888020923680 which belongs to the cache Acpi-Operand of size 72 The buggy address is located 8 bytes inside of freed 72-byte region [ffff888020923680, ffff8880209236c8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20923 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801bc4da40 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800270027 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2238826461, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3266 [inline] allocate_slab mm/slub.c:3380 [inline] new_slab+0xa2/0x640 mm/slub.c:3426 refill_objects+0xe3/0x410 mm/slub.c:7310 refill_sheaf mm/slub.c:2804 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4675 alloc_from_pcs mm/slub.c:4773 [inline] slab_alloc_node mm/slub.c:4905 [inline] kmem_cache_alloc_noprof+0x46e/0x6a0 mm/slub.c:4931 acpi_ut_allocate_object_desc_dbg+0x86/0x240 drivers/acpi/acpica/utobject.c:359 acpi_ut_create_internal_object_dbg+0x51/0x260 drivers/acpi/acpica/utobject.c:69 acpi_ds_build_internal_package_obj+0xa8c/0xe60 drivers/acpi/acpica/dspkginit.c:92 acpi_ds_eval_data_object_operands+0x2fd/0x640 drivers/acpi/acpica/dsopcode.c:638 acpi_ds_exec_end_op+0xe41/0x1e60 drivers/acpi/acpica/dswexec.c:617 acpi_ps_parse_loop+0x5e1/0x26e0 drivers/acpi/acpica/psloop.c:553 acpi_ps_parse_aml+0x81e/0x1120 drivers/acpi/acpica/psparse.c:489 acpi_ps_execute_table+0x393/0x500 drivers/acpi/acpica/psxface.c:295 acpi_ns_execute_table+0x596/0x970 drivers/acpi/acpica/nsparse.c:116 page_owner free stack trace missing Memory state around the buggy address: ffff888020923580: 00 00 fc fc fc fc 00 00 00 00 00 00 00 00 00 fc ffff888020923600: fc fc fc fa fb fb fb fb fb fb fb fb fc fc fc fc >ffff888020923680: fa fb fb fb fb fb fb fb fb fc fc fc fc 00 00 00 ^ ffff888020923700: 00 00 00 00 00 00 fc fc fc fc fa fb fb fb fb fb ffff888020923780: fb fb fb fc fc fc fc 00 00 00 00 00 00 00 00 00 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup