BUG: kernel NULL pointer dereference, address: 0000000000000086 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD a7e8e067 P4D a7e8e067 PUD a6dbb067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8461 Comm: syz-executor.2 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:ffffc900076d7998 EFLAGS: 00010086 RAX: ffffc900076d79c8 RBX: fffffe0000000000 RCX: 0000000000040000 RDX: ffffc9000e28c000 RSI: 00000000000049bd RDI: 00000000000049be RBP: 0000000000000ec0 R08: ffffffff8398c3c3 R09: ffffffff811c7eca R10: ffff88804996c200 R11: 0000000000000002 R12: dffffc0000000000 R13: fffffe0000000ec8 R14: ffffffff880016f0 R15: fffffe0000000ecb FS: 00007fe85f3ce700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000005c CR3: 0000000090cb7000 CR4: 00000000001426e0 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 save_stack mm/kasan/common.c:72 [inline] set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:337 [inline] __kasan_slab_free+0x12e/0x1e0 mm/kasan/common.c:476 __cache_free mm/slab.c:3426 [inline] kfree+0x10a/0x220 mm/slab.c:3757 tomoyo_path_number_perm+0x525/0x690 security/tomoyo/file.c:736 security_file_ioctl+0x55/0xb0 security/security.c:1441 entry_SYSCALL_64_after_hwframe+0x49/0xbe __lock_acquire+0xc5a/0x1bc0 kernel/locking/lockdep.c:3954 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 lock_acquire+0x154/0x250 kernel/locking/lockdep.c:4484 rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:208 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 21c3f6aa3072302b ]--- RIP: 0010:0x86 Code: Bad RIP value. RSP: 0018:ffffc900076d7998 EFLAGS: 00010086 RAX: ffffc900076d79c8 RBX: fffffe0000000000 RCX: 0000000000040000 RDX: ffffc9000e28c000 RSI: 00000000000049bd RDI: 00000000000049be RBP: 0000000000000ec0 R08: ffffffff8398c3c3 R09: ffffffff811c7eca R10: ffff88804996c200 R11: 0000000000000002 R12: dffffc0000000000 R13: fffffe0000000ec8 R14: ffffffff880016f0 R15: fffffe0000000ecb FS: 00007fe85f3ce700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000005c CR3: 0000000090cb7000 CR4: 00000000001426e0