================================================================== BUG: KASAN: slab-use-after-free in acpi_ns_get_attached_object+0x148/0x1b0 drivers/acpi/acpica/nsobject.c:264 Read of size 1 at addr ffff8880222ec480 by task syz.2.2811/17230 CPU: 3 UID: 0 PID: 17230 Comm: syz.2.2811 Tainted: G L Y syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP, [Y]=FORCED_BIND 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_ns_get_attached_object+0x148/0x1b0 drivers/acpi/acpica/nsobject.c:264 acpi_ex_resolve_node_to_value+0xb7/0x9a0 drivers/acpi/acpica/exresnte.c:61 acpi_ex_resolve_to 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_disable+0x1a8/0x360 drivers/acpi/pci_irq.c:499 pcibios_disable_device arch/x86/pci/common.c:706 [inline] pcibios_disable_device arch/x86/pci/common.c:703 [inline] pcibios_release_device+0xc7/0xf0 arch/x86/pci/common.c:713 pci_release_dev+0x45/0x100 drivers/pci/probe.c:2496 device_release+0xd2/0x270 drivers/base/core.c:2640 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f7/0x640 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3884 pci_destroy_dev drivers/pci/remove.c:58 [inline] pci_remove_bus_device+0x305/0x3b0 drivers/pci/remove.c:111 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_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x14b/0x8c0 arch/x86/entry/syscall_32.c:282 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:307 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fc3fbc Code: d2 74 05 c1 e8 0c 89 02 8b 5d fc 31 c0 c9 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 58 b8 RSP: 002b:00000000f547650c EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000080000800 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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_object+0x173/0x790 drivers/acpi/acpica/dsobject.c:94 acpi_ds_create_node+0xe3/0x280 drivers/acpi/acpica/dsobject.c:281 acpi_ds_exec_end_op+0x10cf/0x1e60 drivers/acpi/acpica/dswexec.c:594 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 11827: 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 virtio_pci_remove+0xcf/0x110 drivers/virtio/virtio_pci_common.c:767 pci_device_remove+0xb2/0x1d0 drivers/pci/pci-driver.c:535 device_remove+0xcb/0x180 drivers/base/dd.c:616 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372 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_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x14b/0x8c0 arch/x86/entry/syscall_32.c:282 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:307 entry_SYSENTER_compat_after_hwframe+0x84/0x8e The buggy address belongs to the object at ffff8880222ec478 which belongs to the cache Acpi-Operand of size 72 The buggy address is located 8 bytes inside of freed 72-byte region [ffff8880222ec478, ffff8880222ec4c0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880222ecf08 pfn:0x222ec flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88801d44da40 ffffea000088ce50 ffffea000088c750 raw: ffff8880222ecf08 0000000200270006 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 2528008317 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_create_operand+0x6be/0xc20 drivers/acpi/acpica/dsutils.c:617 acpi_ds_eval_data_object_operands+0x125/0x640 drivers/acpi/acpica/dsopcode.c:596 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: ffff8880222ec380: 00 fc fc fc fc fa fb fb fb fb fb fb fb fb fc fc ffff8880222ec400: fc fc fa fb fb fb fb fb fb fb fb fc fc fc fc fa >ffff8880222ec480: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ^ ffff8880222ec500: fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb ffff8880222ec580: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fc ================================================================== ---------------- Code disassembly (best guess): 0: d2 74 05 c1 shlb %cl,-0x3f(%rbp,%rax,1) 4: e8 0c 89 02 8b call 0x8b028915 9: 5d pop %rbp a: fc cld b: 31 c0 xor %eax,%eax d: c9 leave e: c3 ret f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 0f 1f 00 nopl (%rax) 21: 51 push %rcx 22: 52 push %rdx 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 ret 2e: 90 nop 2f: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi 36: 00 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 3e: 58 pop %rax 3f: b8 .byte 0xb8