audit: type=1804 audit(1584905012.793:92): pid=10558 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir296995936/syzkaller.Zsw4xh/80/file0/bus" dev="loop1" ino=9 res=1 INFO: rcu_preempt self-detected stall on CPU 1-...: (1 GPs behind) idle=baa/140000000000002/0 softirq=22638/22639 fqs=18 (t=10500 jiffies g=5468 c=5467 q=388) rcu_preempt kthread starved for 10352 jiffies! g5468 c5467 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_preempt R running task 29920 8 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 NMI backtrace for cpu 1 CPU: 1 PID: 10557 Comm: syz-executor.0 Not tainted 4.14.174-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline] rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall kernel/rcu/tree.c:1610 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:deref_stack_reg+0x2/0xc0 arch/x86/kernel/unwind_orc.c:288 RSP: 0018:ffff8880aeb077b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff888058c37da8 RBX: ffff8880aeb07878 RCX: 0000000000000001 RDX: ffff8880aeb078c0 RSI: ffff888058c37da0 RDI: ffff8880aeb07878 RBP: 1ffff11015d60f00 R08: ffffffff88e63d8a R09: ffff888058c37cc8 R10: ffff8880aeb078ad R11: 0000000000058071 R12: ffffffff88e63d86 R13: ffff8880aeb078b0 R14: ffff8880aeb078c0 R15: 0000000000000001 unwind_next_frame+0xa06/0x17a0 arch/x86/kernel/unwind_orc.c:425 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44 save_stack+0x32/0xa0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 kmem_cache_alloc_node+0x148/0x7a0 mm/slab.c:3642 __alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:402 ndisc_send_rs+0x2ea/0x630 net/ipv6/ndisc.c:661 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3761 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611 RSP: 0018:ffff888058c37b50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2cd3 RBX: dffffc0000000000 RCX: 1ffff1100a421993 RDX: 0000000000000000 RSI: ffff88805210cc78 RDI: ffff88805210cbfc RBP: ffffed100a421870 R08: 00000049d8870e67 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805210c380 R13: ffffffff87d16698 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:mm_take_all_locks+0x35c/0x583 mm/mmap.c:3482 RSP: 0018:ffff888058c37c28 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffff11011b59bc6 RBX: ffff88809777edd0 RCX: ffffc90005e14000 RDX: 000000000000fd07 RSI: ffffffff817bb26c RDI: ffff88808dacde30 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 00000000000000a0 R11: ffff88805210c380 R12: ffff888050cfb940 R13: ffff88805210c380 R14: ffff88808dacdda8 R15: ffff88809777ede0 do_mmu_notifier_register+0x33a/0x450 mm/mmu_notifier.c:248 kvm_init_mmu_notifier arch/x86/kvm/../../../virt/kvm/kvm_main.c:513 [inline] kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:705 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3270 [inline] kvm_dev_ioctl+0xa14/0x1480 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3321 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c849 RSP: 002b:00007fb9421e2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb9421e36d4 RCX: 000000000045c849 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000038f R14: 00000000004c6057 R15: 000000000076bf0c