BUG: kernel NULL pointer dereference, address: 0000000000000086 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 9d8bf067 P4D 9d8bf067 PUD 8c725067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8628 Comm: syz-executor.5 Not tainted 5.6.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x86 Code: Bad RIP value. RSP: 0018:ffffc90003c87998 EFLAGS: 00010086 RAX: ffffc90003c879c8 RBX: fffffe0000000000 RCX: 0000000000040000 RDX: ffffc900148d0000 RSI: 000000000000340f RDI: 0000000000003410 RBP: 0000000000000ec0 R08: ffffffff8398c3c3 R09: ffffffff811c7eca R10: ffff88804bc18000 R11: 0000000000000002 R12: dffffc0000000000 R13: fffffe0000000ec8 R14: ffffffff880016f0 R15: fffffe0000000ecb FS: 00007f9febeb9700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000005c CR3: 00000000a33fd000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: handle_external_interrupt_irqoff+0x154/0x280 arch/x86/kvm/vmx/vmx.c:6274 kvm_before_interrupt arch/x86/kvm/x86.h:343 [inline] handle_external_interrupt_irqoff+0x132/0x280 arch/x86/kvm/vmx/vmx.c:6272 __irqentry_text_start+0x8/0x8 vcpu_enter_guest+0x6c77/0x9290 arch/x86/kvm/x86.c:8405 paravirt_read_msr arch/x86/include/asm/paravirt.h:161 [inline] get_debugctlmsr arch/x86/include/asm/processor.h:787 [inline] vmx_vcpu_load+0x45f/0x530 arch/x86/kvm/vmx/vmx.c:1408 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:163 [inline] mark_lock+0x107/0x1650 kernel/locking/lockdep.c:3642 set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline] kvm_make_request include/linux/kvm_host.h:1222 [inline] kvm_arch_vcpu_load+0x53e/0x810 arch/x86/kvm/x86.c:3564 __fire_sched_in_preempt_notifiers kernel/sched/core.c:3025 [inline] fire_sched_in_preempt_notifiers kernel/sched/core.c:3031 [inline] finish_task_switch+0x2e2/0x550 kernel/sched/core.c:3223 mark_held_locks kernel/locking/lockdep.c:3359 [inline] __trace_hardirqs_on_caller kernel/locking/lockdep.c:3388 [inline] lockdep_hardirqs_on+0x4f4/0x840 kernel/locking/lockdep.c:3433 trace_hardirqs_on_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:41 trace_hardirqs_on_thunk+0x1a/0x1c arch/x86/entry/thunk_64.S:41 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] test_ti_thread_flag include/linux/thread_info.h:84 [inline] need_resched include/linux/sched.h:1820 [inline] preempt_schedule_irq+0x113/0x150 kernel/sched/core.c:4340 retint_kernel+0x2b/0x2b kvm_check_async_pf_completion+0x34e/0x360 arch/x86/kvm/../../../virt/kvm/async_pf.c:137 vcpu_run+0x3a3/0xd50 arch/x86/kvm/x86.c:8513 kvm_arch_vcpu_ioctl_run+0x419/0x880 arch/x86/kvm/x86.c:8735 kvm_vcpu_ioctl+0x67c/0xa80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2932 kvm_vm_release+0x50/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:858 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl fs/ioctl.c:763 [inline] __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:770 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Modules linked in: CR2: 0000000000000086 ---[ end trace 1b9f05ecbda880cf ]--- RIP: 0010:0x86 Code: Bad RIP value. RSP: 0018:ffffc90003c87998 EFLAGS: 00010086 RAX: ffffc90003c879c8 RBX: fffffe0000000000 RCX: 0000000000040000 RDX: ffffc900148d0000 RSI: 000000000000340f RDI: 0000000000003410 RBP: 0000000000000ec0 R08: ffffffff8398c3c3 R09: ffffffff811c7eca R10: ffff88804bc18000 R11: 0000000000000002 R12: dffffc0000000000 R13: fffffe0000000ec8 R14: ffffffff880016f0 R15: fffffe0000000ecb FS: 00007f9febeb9700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000005c CR3: 00000000a33fd000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400