rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=64ec/1/0x4000000000000000 softirq=14683/14683 fqs=0
rcu: 	(detected by 1, t=14726 jiffies, g=9737, q=34 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5733 Comm: syz.0.7 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:kasan_check_range+0x26/0x2c0
Code: 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ae 01 00 00 4c 8d 04 37 49 39 f8 0f 82 36 02 00 00 <49> b9 00 00 00 00 00 80 ff ff eb 0d cc cc cc 49 b9 00 00 00 00 00
RSP: 0018:ffffc90000007610 EFLAGS: 00000212
RAX: ffffffff933b3e01 RBX: ffffea0004556700 RCX: ffffffff82234342
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88815fffc6f8
RBP: ffff88815fffc6f8 R08: ffff88815fffc700 R09: 1ffff110242081d8
R10: dffffc0000000000 R11: ffffed10242081d9 R12: ffff88815fffc100
R13: 0000000000000901 R14: ffffc9000000787c R15: ffffc90000007868
FS:  000055556241f500(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc327d5d58 CR3: 000000016636b000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 get_page_from_freelist+0x1eb2/0x2540
 __alloc_frozen_pages_noprof+0x18d/0x380
 allocate_slab+0x77/0x660
 refill_objects+0x339/0x3d0
 __pcs_replace_empty_main+0x321/0x720
 kmem_cache_alloc_node_noprof+0x441/0x690
 __alloc_skb+0x27d/0x7d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 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:kasan_check_range+0x97/0x2c0
Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 9e 01 00 00 49 ff c3 48 ff c3 75 ee e9 1d 01 00 00 44 89 dd
RSP: 0018:ffffc900065f7d88 EFLAGS: 00000246
RAX: ffffffff81b8ba01 RBX: fffffffffffffffe RCX: ffffffff81b8ba9e
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900065f7e60
RBP: 0000000000000000 R08: ffffc900065f7e6f R09: 1ffff92000cbefcd
R10: dffffc0000000000 R11: fffff52000cbefcc R12: 0000000000000002
R13: ffffc900065f7e60 R14: fffff52000cbefce R15: 1ffff92000cbefcc
 __asan_memset+0x22/0x50
 __se_sys_futex+0xbe/0x450
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc3459cdd9
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:00007ffd499741f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000000001e0 RCX: 00007fcc3459cdd9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fcc34816188
RBP: 0000000000001313 R08: 00007ffd49974097 R09: 0000000000000000
R10: 00007fcc34815fa0 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fcc3481618c R14: 00007fcc34816188 R15: 00007fcc34816180
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 14725 jiffies! g9737 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=2233
rcu: rcu_preempt kthread starved for 14726 jiffies! g9737 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+0x1821/0x5740
 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: 5734 Comm: syz.0.7 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 02 eb 85 00 fb 4c 89 f0 <48> c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2b fd e8 00 49 ff 06
RSP: 0018:ffffc900065d75e0 EFLAGS: 00000206
RAX: ffff888114584720 RBX: 1ffff110228b06bf RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa6837 RDI: ffffffff8c28af60
RBP: ffffc900065d79b0 R08: ffffffff9030b6f7 R09: 1ffffffff20616de
R10: dffffc0000000000 R11: fffffbfff20616df R12: ffff8881145835fa
R13: ffff8881145829c0 R14: ffff888114584720 R15: dffffc0000000000
FS:  00007fcc353816c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000016636b000 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: 0033:0x7fcc3459cdd9
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:00007fcc35381028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcc34815fa0 RCX: 00007fcc3459cdd9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fcc34632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc34816038 R14: 00007fcc34815fa0 R15: 00007ffd49974098
 </TASK>
