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<6ae15d2b.985912ea.1e5798.0125.GAE@google.com> Subject: Re: [syzbot] [acpica?] KASAN: slab-use-after-free Read in acpi_ut_update_object_reference From: syzbot To: acpica-devel@lists.linux.dev, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, maciej.wieczor-retman@intel.com, pawel.chmielewski@intel.com, rafael@kernel.org, robert.moore@intel.com, saket.dumbre@intel.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 62c457528529 Merge tag 'vfs-7.4-rc1.keyring' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1340e469580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6f2905533069b0f5 dashboard link: https://syzkaller.appspot.com/bug?extid=c6c92a97a9907f92fa1c compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=103a8c81580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-62c45752.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6cb6bd98bf2b/vmlinux-62c45752.xz kernel image: https://storage.googleapis.com/syzbot-assets/139b1aebfd25/bzImage-62c45752.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c6c92a97a9907f92fa1c@syzkaller.appspotmail.com pci 0000:00:04.0: bridge window [mem 0x80000000-0x801fffff] pci 0000:00:04.0: bridge window [mem 0x380000000000-0x3800001fffff 64bit pref] ================================================================== BUG: KASAN: slab-use-after-free in acpi_ut_update_object_reference+0x701/0x800 drivers/acpi/acpica/utdelete.c:544 Read of size 1 at addr ffff8880236b6f11 by task syz.0.17/6000 CPU: 3 UID: 0 PID: 6000 Comm: syz.0.17 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 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_ut_update_object_reference+0x701/0x800 drivers/acpi/acpica/utdelete.c:544 acpi_ut_add_reference+0x80/0x170 drivers/acpi/acpica/utdelete.c:694 acpi_ex_resolve_node_to_value+0x7e1/0x9a0 drivers/acpi/acpica/exresnte.c:135 acpi_ex_resolve_to_value+0x3da/0xcd0 drivers/acpi/acpica/exresolv.c:76 acpi_ds_evaluate_name_path+0x30d/0x4a0 drivers/acpi/acpica/dsutils.c:790 acpi_ds_exec_end_op+0xb78/0x1e60 drivers/acpi/acpica/dswexec.c:374 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+0x178/0xdd0 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:2056 pci_enable_device_flags+0x27c/0x370 drivers/pci/pci.c:2147 pcie_port_device_register drivers/pci/pcie/portdrv.c:337 [inline] pcie_portdrv_probe+0x167/0x1250 drivers/pci/pcie/portdrv.c:701 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:354 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:416 __pci_device_probe drivers/pci/pci-driver.c:478 [inline] pci_device_probe+0x25b/0x400 drivers/pci/pci-driver.c:512 call_driver_probe drivers/base/dd.c:629 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:707 __driver_probe_device+0x210/0x460 drivers/base/dd.c:869 driver_probe_device+0x4a/0x140 drivers/base/dd.c:899 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1027 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:503 __device_attach+0x1e4/0x4c0 drivers/base/dd.c:1131 device_initial_probe+0xaf/0xf0 drivers/base/dd.c:1190 pci_bus_add_device+0xc5/0x100 drivers/pci/bus.c:373 pci_bus_add_devices+0x9a/0x1f0 drivers/pci/bus.c:394 pci_rescan_bus+0x2a/0x40 drivers/pci/probe.c:3509 rescan_store+0xfb/0x130 drivers/pci/pci-sysfs.c:474 bus_attr_store+0x74/0xb0 drivers/base/bus.c:173 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc9c9f9f559 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd2d32bec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc9ca225fa0 RCX: 00007fc9c9f9f559 RDX: 000000000000001e RSI: 0000200000000600 RDI: 0000000000000005 RBP: 00007fc9ca036b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc9ca225fac R14: 00007fc9ca225fa0 R15: 00007fc9ca225fa0 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:351 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:377 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4720 [inline] slab_alloc_node mm/slub.c:5033 [inline] kmem_cache_alloc_noprof+0x269/0x6a0 mm/slub.c:5047 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 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:1357 [inline] acpi_init+0x146/0x840 drivers/acpi/bus.c:1470 do_one_initcall+0x11c/0x6f0 init/main.c:1423 do_initcall_level init/main.c:1485 [inline] do_initcalls init/main.c:1501 [inline] do_basic_setup init/main.c:1521 [inline] kernel_init_freeable+0x6ea/0x7b0 init/main.c:1736 kernel_init+0x21/0x1d0 init/main.c:1626 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 6000: 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:264 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:296 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2780 [inline] slab_free mm/slub.c:6630 [inline] kmem_cache_free+0x127/0x6c0 mm/slub.c:6757 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+0x5f9/0x800 drivers/acpi/acpica/utdelete.c:632 acpi_ut_remove_reference drivers/acpi/acpica/utdelete.c:740 [inline] acpi_ut_remove_reference+0x192/0x1d0 drivers/acpi/acpica/utdelete.c:710 acpi_rs_get_prt_method_data+0xcd/0x150 drivers/acpi/acpica/rsutils.c:460 acpi_get_irq_routing_table+0xb8/0x140 drivers/acpi/acpica/rsxface.c:137 acpi_pci_irq_find_prt_entry+0x178/0xdd0 drivers/acpi/pci_irq.c:215 acpi_pci_irq_lookup+0x8e/0x6b0 drivers/acpi/pci_irq.c:299 acpi_pci_irq_disable+0x1a8/0x360 drivers/acpi/pci_irq.c:499 pcibios_disable_device arch/x86/pci/common.c:706 [inline] pcibios_disable_device+0x89/0xb0 arch/x86/pci/common.c:703 do_pci_disable_device+0x9f/0x100 drivers/pci/pci.c:2228 pci_disable_device+0x130/0x270 drivers/pci/pci.c:2264 pci_device_remove+0xb2/0x1d0 drivers/pci/pci-driver.c:535 device_remove+0xcb/0x180 drivers/base/dd.c:617 __device_release_driver drivers/base/dd.c:1357 [inline] device_release_driver_internal+0x441/0x610 drivers/base/dd.c:1380 pci_stop_dev drivers/pci/remove.c:27 [inline] pci_stop_bus_device+0x120/0x160 drivers/pci/remove.c:94 pci_stop_and_remove_bus_device+0x58/0xa0 drivers/pci/remove.c:129 pci_stop_and_remove_bus_device_locked+0x1a/0x20 drivers/pci/remove.c:137 remove_store+0x123/0x140 drivers/pci/pci-sysfs.c:524 dev_attr_store+0x58/0x80 drivers/base/core.c:2509 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880236b6f08 which belongs to the cache Acpi-Operand of size 72 The buggy address is located 9 bytes inside of freed 72-byte region [ffff8880236b6f08, ffff8880236b6f50) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x236b6 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801d44da40 dead000000000100 dead000000000122 raw: 0000000000000000 0000000200270027 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 2738198611 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1854 prep_new_page mm/page_alloc.c:1862 [inline] get_page_from_freelist+0x1113/0x35e0 mm/page_alloc.c:3933 __alloc_frozen_pages_noprof+0x2f6/0x3190 mm/page_alloc.c:5429 alloc_slab_page mm/slub.c:3384 [inline] allocate_slab mm/slub.c:3499 [inline] new_slab+0xb1/0x6d0 mm/slub.c:3550 refill_objects+0xe3/0x410 mm/slub.c:7539 refill_sheaf mm/slub.c:2917 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4811 alloc_from_pcs mm/slub.c:4887 [inline] slab_alloc_node mm/slub.c:5021 [inline] kmem_cache_alloc_noprof+0x4bf/0x6a0 mm/slub.c:5047 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 page_owner free stack trace missing Memory state around the buggy address: ffff8880236b6e00: fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb ffff8880236b6e80: fc fc fc fc fa fb fb fb fb fb fb fb fb fc fc fc >ffff8880236b6f00: fc fa fb fb fb fb fb fb fb fb fc fc fc fc 00 00 ^ ffff8880236b6f80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ffff8880236b7000: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ================================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.