rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=7eec/1/0x4000000000000000 softirq=15803/15803 fqs=0
rcu: 	(detected by 1, t=29893 jiffies, g=11025, q=228 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5965 Comm: syz.1.58 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:deref_stack_reg+0xb0/0x230
Code: 4d 8b 77 10 4c 89 fd 48 c1 ed 03 0f b6 44 35 00 84 c0 0f 85 3c 01 00 00 41 83 3f 00 0f 95 c0 4c 39 c3 0f 96 c1 20 c1 4d 39 c6 <0f> 97 c0 20 c8 3c 01 75 18 49 8d 40 08 48 39 d8 0f 97 c1 4c 39 f0
RSP: 0018:ffffc900000073e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: ffffc900097b8000 RCX: 0000000000000001
RDX: ffffc90000007548 RSI: dffffc0000000000 RDI: ffffc90000007508
RBP: 1ffff92000000ea1 R08: ffffc900097bfca0 R09: 0000000000000000
R10: ffffc90000007558 R11: fffff52000000ead R12: 1ffff92000000ea2
R13: 1ffff92000000ea3 R14: ffffc900097c0000 R15: ffffc90000007508
FS:  000055557ac9d500(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000171dc0000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 unwind_next_frame+0x19d5/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x2bc/0x650
 dst_alloc+0x105/0x170
 icmp6_dst_alloc+0x75/0x440
 ndisc_send_skb+0x44a/0x1670
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:smp_call_function_single+0x3a4/0x5b0
Code: e6 01 31 ff e8 9d 20 0c 00 41 83 e4 01 75 11 e8 52 1c 0c 00 4d 89 ec eb 41 e8 48 1c 0c 00 eb 3a 4d 89 ec f3 90 42 0f b6 04 33 <84> c0 75 10 41 f7 07 01 00 00 00 74 1e e8 2a 1c 0c 00 eb e5 44 89
RSP: 0018:ffffc900097bfae0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff920012f7f69 RCX: ffff88816c28a500
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900097bfbd0 R08: ffffc900097bfa27 R09: 1ffff920012f7f44
R10: dffffc0000000000 R11: fffff520012f7f45 R12: 1ffff920012f7f64
R13: 1ffff920012f7f64 R14: dffffc0000000000 R15: ffffc900097bfb48
 rcu_barrier+0x360/0x580
 kvm_mmu_uninit_vm+0x53/0x90
 kvm_arch_destroy_vm+0x26b/0x2d0
 kvm_put_kvm+0x6ca/0xa50
 kvm_vm_release+0x43/0x50
 __fput+0x44f/0xa60
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f97a3d9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcacac0738 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f97a4017da0 RCX: 00007f97a3d9cdd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f97a4017da0 R08: 00007f97a4016218 R09: 0000000000000000
R10: 00000000003d2548 R11: 0000000000000246 R12: 0000000000012b7e
R13: 00007f97a401627c R14: 00000000000129ab R15: 00007f97a4016270
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 29892 jiffies! g11025 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=2445
rcu: rcu_preempt kthread starved for 29924 jiffies! g11025 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R stack:27968 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5968 Comm: syz.0.57 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:vcpu_run+0x5a02/0x7860
Code: 4c 8b a4 24 28 01 00 00 4c 89 e3 48 c1 eb 03 42 0f b6 04 3b 84 c0 0f 85 1c 0b 00 00 41 c6 04 24 01 e8 d2 ee 85 00 fb 4c 89 f0 <48> c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 cb fe e8 00 49 ff 06
RSP: 0018:ffffc9000a2575e0 EFLAGS: 00000202
RAX: ffff88816c3ff0e0 RBX: 1ffff1102d87fbf7 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa6610 RDI: ffffffff8c28ade0
RBP: ffffc9000a2579b0 R08: ffffffff9030adf7 R09: 1ffffffff20615be
R10: dffffc0000000000 R11: fffffbfff20615bf R12: ffff88816c3fdfba
R13: ffff88816c3fd380 R14: ffff88816c3ff0e0 R15: dffffc0000000000
FS:  00007f69970aa6c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000016a622000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kvm_arch_vcpu_ioctl_run+0x11e6/0x20d0
 kvm_vcpu_ioctl+0xa62/0xfd0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f699619cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f69970aa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6996415fa0 RCX: 00007f699619cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000a
RBP: 00007f6996232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6996416038 R14: 00007f6996415fa0 R15: 00007fff46234fb8
 </TASK>
