Console: switching to colour frame buffer device 160x50 bochs-drm 0000:00:01.0: [drm] fb0: bochs-drmdrmfb frame buffer device ================================================================== BUG: KASAN: use-after-free in acpi_ns_get_attached_object+0x148/0x1b0 drivers/acpi/acpica/nsobject.c:264 Read of size 1 at addr ffff88801eaed070 by task syz.0.3462/19261 CPU: 3 UID: 0 PID: 19261 Comm: syz.0.3462 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP 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_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 virtio_pci_probe+0x1d5/0x410 drivers/virtio/virtio_pci_common.c:709 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:500 __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:172 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: 0023:0xf7f85fbc 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:00000000f543650c EFLAGS: 00000292 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00000000800007c0 RDX: 0000000000000026 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88801eaedf70 pfn:0x1eaed flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffff88802b042720 ffffea00008a45c8 0000000000000000 raw: ffff88801eaedf70 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 0, tgid 0 (swapper/0), ts 1397221341 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0x112f/0x3640 mm/page_alloc.c:3940 __alloc_frozen_pages_noprof+0x2ad/0x31e0 mm/page_alloc.c:5464 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_ns_root_initialize+0x29a/0xa90 drivers/acpi/acpica/nsaccess.c:141 acpi_initialize_subsystem+0x186/0x270 drivers/acpi/acpica/utxfinit.c:77 acpi_early_init+0x16d/0x440 drivers/acpi/bus.c:1281 start_kernel+0x3e2/0x490 init/main.c:1209 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x158 page last free pid 18755 tgid 18753 ts 860223014351 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1403 [inline] __free_frozen_pages+0x7b4/0x1110 mm/page_alloc.c:2957 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:361 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] __do_kmalloc_node mm/slub.c:5530 [inline] __kmalloc_noprof+0x2cc/0x840 mm/slub.c:5556 _kmalloc_noprof include/linux/slab.h:995 [inline] io_cache_alloc_new+0x45/0xe0 io_uring/alloc_cache.c:40 io_cache_alloc io_uring/alloc_cache.h:61 [inline] io_uring_alloc_async_data io_uring/io_uring.h:345 [inline] io_uring_cmd_prep+0x3ef/0x670 io_uring/uring_cmd.c:193 io_init_req io_uring/io_uring.c:1997 [inline] io_submit_sqe io_uring/io_uring.c:2044 [inline] io_submit_sqes+0xa48/0x2760 io_uring/io_uring.c:2212 __do_sys_io_uring_enter+0xa88/0x1b10 io_uring/io_uring.c:2903 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 Memory state around the buggy address: ffff88801eaecf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801eaecf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801eaed000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88801eaed080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88801eaed100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== ---------------- 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