ksys_read+0x127/0x250 fs/read_write.c:607 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc171e89279 ================================ WARNING: inconsistent lock state 6.0.0-rc1-syzkaller-00066-g3b06a2755758 #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/12078 [HC0[0]:SC1[1]:HE0:SE0] takes: ffffffff8c0beef8 (vmap_area_lock){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] ffffffff8c0beef8 (vmap_area_lock){+.?.}-{2:2}, at: find_vmap_area+0x1c/0x130 mm/vmalloc.c:1836 {SOFTIRQ-ON-W} state was registered at: lock_acquire kernel/locking/lockdep.c:5666 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:349 [inline] alloc_vmap_area+0xa0b/0x1d50 mm/vmalloc.c:1617 __get_vm_area_node+0x142/0x3f0 mm/vmalloc.c:2484 get_vm_area_caller+0x43/0x50 mm/vmalloc.c:2537 __ioremap_caller.constprop.0+0x292/0x600 arch/x86/mm/ioremap.c:280 acpi_os_ioremap include/acpi/acpi_io.h:13 [inline] acpi_map drivers/acpi/osl.c:296 [inline] acpi_os_map_iomem+0x463/0x550 drivers/acpi/osl.c:355 acpi_tb_acquire_table+0xd8/0x209 drivers/acpi/acpica/tbdata.c:142 acpi_tb_validate_table drivers/acpi/acpica/tbdata.c:317 [inline] acpi_tb_validate_table+0x50/0x8c drivers/acpi/acpica/tbdata.c:308 acpi_tb_verify_temp_table+0x84/0x674 drivers/acpi/acpica/tbdata.c:504 acpi_reallocate_root_table+0x374/0x3e0 drivers/acpi/acpica/tbxface.c:180 acpi_early_init+0x13a/0x438 drivers/acpi/bus.c:1214 start_kernel+0x3cf/0x48f init/main.c:1099 secondary_startup_64_no_verify+0xce/0xdb irq event stamp: 1035 hardirqs last enabled at (1034): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (1034): [] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 hardirqs last disabled at (1035): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (1035): [] _raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162 softirqs last enabled at (0): [] copy_process+0x213e/0x7090 kernel/fork.c:2201 softirqs last disabled at (1021): [] invoke_softirq kernel/softirq.c:445 [inline] softirqs last disabled at (1021): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(vmap_area_lock); lock(vmap_area_lock); *** DEADLOCK *** 6 locks held by syz-executor.0/12078: #0: ffffffff8ca48508 (reading_mutex){+.+.}-{3:3}, at: rng_dev_read+0xaa/0x580 drivers/char/hw_random/core.c:223 #1: ffffc900001e0d70 ((&dum_hcd->timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:31 [inline] #1: ffffc900001e0d70 ((&dum_hcd->timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x6b0 kernel/time/timer.c:1464 #2: ffff888078cea230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_event drivers/input/input.c:430 [inline] #2: ffff888078cea230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_event+0x6c/0xa0 drivers/input/input.c:423 #3: ffffffff8bf892c0 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x710 drivers/input/input.c:858 #4: ffffffff8ca187b8 (kbd_event_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #4: ffffffff8ca187b8 (kbd_event_lock){..-.}-{2:2}, at: kbd_event+0x86/0x1790 drivers/tty/vt/keyboard.c:1537 #5: ffffffff8bf892c0 (rcu_read_lock){....}-{1:2}, at: show_state_filter+0x0/0x300 kernel/sched/core.c:8832 stack backtrace: CPU: 1 PID: 12078 Comm: syz-executor.0 Not tainted 6.0.0-rc1-syzkaller-00066-g3b06a2755758 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_usage_bug kernel/locking/lockdep.c:3961 [inline] valid_state kernel/locking/lockdep.c:3973 [inline] mark_lock_irq kernel/locking/lockdep.c:4176 [inline] mark_lock.part.0.cold+0x18/0xd8 kernel/locking/lockdep.c:4632 mark_lock kernel/locking/lockdep.c:4596 [inline] mark_usage kernel/locking/lockdep.c:4527 [inline] __lock_acquire+0x11d9/0x56d0 kernel/locking/lockdep.c:5007 lock_acquire kernel/locking/lockdep.c:5666 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:349 [inline] find_vmap_area+0x1c/0x130 mm/vmalloc.c:1836 check_heap_object mm/usercopy.c:176 [inline] __check_object_size mm/usercopy.c:250 [inline] __check_object_size+0x1f8/0x700 mm/usercopy.c:212 check_object_size include/linux/thread_info.h:199 [inline] __copy_from_user_inatomic include/linux/uaccess.h:62 [inline] copy_from_user_nmi arch/x86/lib/usercopy.c:47 [inline] copy_from_user_nmi+0xcb/0x130 arch/x86/lib/usercopy.c:31 copy_code arch/x86/kernel/dumpstack.c:91 [inline] show_opcodes+0x59/0xb0 arch/x86/kernel/dumpstack.c:121 show_iret_regs+0xd/0x33 arch/x86/kernel/dumpstack.c:149 __show_regs+0x1e/0x60 arch/x86/kernel/process_64.c:74 show_trace_log_lvl+0x25b/0x2ba arch/x86/kernel/dumpstack.c:292 sched_show_task kernel/sched/core.c:8870 [inline] sched_show_task+0x44c/0x5c0 kernel/sched/core.c:8844 show_state_filter+0x13e/0x300 kernel/sched/core.c:8915 k_spec drivers/tty/vt/keyboard.c:667 [inline] k_spec+0xe1/0x130 drivers/tty/vt/keyboard.c:656 kbd_keycode drivers/tty/vt/keyboard.c:1524 [inline] kbd_event+0xcdd/0x1790 drivers/tty/vt/keyboard.c:1543 input_to_handler+0x3b9/0x4c0 drivers/input/input.c:130 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:159 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x537/0x730 drivers/input/input.c:385 input_handle_event+0x112/0xda0 drivers/input/input.c:402 input_event drivers/input/input.c:431 [inline] input_event+0x7f/0xa0 drivers/input/input.c:423 hidinput_hid_event+0x79d/0x2010 drivers/hid/hid-input.c:1633 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1527 hid_input_array_field+0x4d7/0x660 drivers/hid/hid-core.c:1639 hid_process_report drivers/hid/hid-core.c:1681 [inline] hid_report_raw_event+0xa8a/0x1280 drivers/hid/hid-core.c:1998 hid_input_report+0x360/0x4c0 drivers/hid/hid-core.c:2065 hid_irq_in+0x50e/0x690 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1671 usb_hcd_giveback_urb+0x380/0x430 drivers/usb/core/hcd.c:1754 dummy_timer+0x11ff/0x32c0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 2e 08 dd f7 48 89 ef e8 b6 89 dd f7 e8 e1 12 00 f8 fb bf 01 00 00 00 c6 4a d0 f7 65 8b 05 8f ff 7f 76 85 c0 74 02 5d c3 e8 0e 05 7e RSP: 0018:ffffc90002e07bb0 EFLAGS: 00000202 RAX: 00000000000003fb RBX: ffff88801d1fc4e0 RCX: 1ffffffff211fcf6 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88801d1fc4e8 R08: 0000000000000001 R09: ffffffff908dd997 R10: 0000000000000001 R11: 0000000000000000 R12: 7fffffffffffffff R13: ffff88801d1fc4e8 R14: 1ffff11003a3f8a7 R15: ffff88801d1fc4e0 __wait_for_common+0x340/0x530 kernel/sched/completion.c:107 wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion_killable+0x1b/0x30 kernel/sched/completion.c:243 virtio_read+0x19c/0x230 drivers/char/hw_random/virtio-rng.c:105 rng_get_data drivers/char/hw_random/core.c:191 [inline] rng_dev_read+0x35c/0x580 drivers/char/hw_random/core.c:228 vfs_read+0x257/0x930 fs/read_write.c:468 ksys_read+0x127/0x250 fs/read_write.c:607 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc171e89279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc1730a8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fc171f9bf80 RCX: 00007fc171e89279 RDX: 000000007ffff000 RSI: 0000000020000bc0 RDI: 0000000000000003 RBP: 00007fc171ee3189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc1724cfb1f R14: 00007fc1730a8300 R15: 0000000000022000 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc1730a8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fc171f9bf80 RCX: 00007fc171e89279 RDX: 000000007ffff000 RSI: 0000000020000bc0 RDI: 0000000000000003 RBP: 00007fc171ee3189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc1724cfb1f R14: 00007fc1730a8300 R15: 0000000000022000 task:syz-executor.0 state:R running task stack:27928 pid:12089 ppid: 3647 flags:0x0000000a Call Trace: task:syz-executor.1 state:R running task stack:27616 pid:12079 ppid: 3661 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6806 irqentry_exit+0x31/0x80 kernel/entry/common.c:428 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:mod_objcg_state+0x3db/0xa50 mm/memcontrol.c:3159 Code: c6 46 b8 cf 81 4c 89 e7 e8 62 bf 8f ff 4d 85 ed 0f 85 c5 01 00 00 9c 58 f6 c4 02 0f 85 7f 03 00 00 4d 85 ed 74 01 fb 4d 85 ff <0f> 84 92 01 00 00 48 83 c4 28 4c 89 ff 5b 5d 41 5c 41 5d 41 5e 41 RSP: 0018:ffffc90002e17918 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffff8880b9a35e20 RCX: 1ffffffff211e20e RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8880b9a35e48 R08: 0000000000000001 R09: ffffffff908dd977 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b9a35e20 R13: 0000000000000200 R14: ffff88813fffa000 R15: 0000000000000000 memcg_slab_free_hook mm/slab.h:565 [inline] slab_free mm/slub.c:3529 [inline] kmem_cache_free+0x443/0x5b0 mm/slub.c:3551 remove_vma+0x135/0x170 mm/mmap.c:147 exit_mmap+0x24d/0x490 mm/mmap.c:3121 __mmput+0x122/0x4b0 kernel/fork.c:1187 mmput+0x56/0x60 kernel/fork.c:1208 exit_mm kernel/exit.c:510 [inline] do_exit+0x9e2/0x29b0 kernel/exit.c:782 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 get_signal+0x238c/0x2610 kernel/signal.c:2857 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:166 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f82b1c89279 RSP: 002b:00007f82b2e51168 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 000000000000001d RBX: 00007f82b1d9bf80 RCX: 00007f82b1c89279 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000000a RBP: 00007f82b1ce3189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f82b22cfb1f R14: 00007f82b2e51300 R15: 0000000000022000 INFO: lockdep is turned off. ---------------- Code disassembly (best guess): 0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 5: 55 push %rbp 6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi b: 48 89 fd mov %rdi,%rbp e: 48 83 c7 18 add $0x18,%rdi 12: e8 2e 08 dd f7 callq 0xf7dd0845 17: 48 89 ef mov %rbp,%rdi 1a: e8 b6 89 dd f7 callq 0xf7dd89d5 1f: e8 e1 12 00 f8 callq 0xf8001305 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 c6 4a d0 f7 callq 0xf7d04af5 <-- trapping instruction 2f: 65 8b 05 8f ff 7f 76 mov %gs:0x767fff8f(%rip),%eax # 0x767fffc5 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5d pop %rbp 3b: c3 retq 3c: e8 .byte 0xe8 3d: 0e (bad) 3e: 05 .byte 0x5 3f: 7e .byte 0x7e