rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=3e3c/1/0x4000000000000000 softirq=24298/24299 fqs=30
rcu: 	(t=10500 jiffies g=14317 q=532 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10440 jiffies! g14317 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=5014
rcu: rcu_preempt kthread starved for 10441 jiffies! g14317 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:26632 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 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:native_queued_spin_lock_slowpath+0xaf/0x8e0
Code: 00 00 00 c7 44 24 60 00 00 00 00 0f 1f 44 00 00 4c 8d 74 24 60 49 89 df 49 c1 ef 03 41 bd 01 00 00 00 eb 06 89 44 24 60 f3 90 <48> 89 df be 04 00 00 00 e8 94 19 a7 f6 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc900001e0920 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880299098c0 RCX: ffffffff8b7bfe5c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880299098c0
RBP: ffffc900001e0a18 R08: ffff8880299098c3 R09: 1ffff11005321318
R10: dffffc0000000000 R11: ffffed1005321319 R12: 1ffff9200003c12c
R13: 0000000000000001 R14: ffffc900001e0980 R15: 1ffff11005321318
FS:  0000000000000000(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3d1fd4 CR3: 0000000027942000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 xfrm_policy_kill+0x240/0x440
 xfrm_policy_timer+0x353/0x630
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0x13/0x20
Code: 13 e8 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d f3 d6 0e 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000177de0 EFLAGS: 00000282
RAX: e1fcccb337745e00 RBX: ffffffff819683a8 RCX: e1fcccb337745e00
RDX: 0000000000000001 RSI: ffffffff8d9b69f6 RDI: ffffffff8be33300
RBP: ffffc90000177f20 R08: ffff888136632f9b R09: 1ffff11026cc65f3
R10: dffffc0000000000 R11: ffffed1026cc65f4 R12: ffffffff8fa37e30
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110200d0000
 default_idle+0x13/0x20
 default_idle_call+0x74/0xb0
 do_idle+0x1e8/0x510
 cpu_startup_entry+0x44/0x60
 start_secondary+0x101/0x110
 common_startup_64+0x13e/0x147
 </TASK>
CPU: 0 UID: 0 PID: 7874 Comm: syz.1.559 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:__sanitizer_cov_trace_pc+0x4a/0x70
Code: 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 <8b> 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 e9 4e 8f
RSP: 0018:ffffc90002baf0d8 EFLAGS: 00000246
RAX: ffffffff8a218134 RBX: 0000000004000000 RCX: ffff88802e91d640
RDX: ffffc90003ad9000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90002baf230 R08: 0000000000000000 R09: ffffffff8a217ea0
R10: dffffc0000000000 R11: fffff52000575e0c R12: dffffc0000000000
R13: ffff888104f1d200 R14: 0000000006000000 R15: ffffc90002baf6a0
FS:  00007f87af3f66c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87b1174c40 CR3: 0000000027942000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xfrm_alloc_spi+0x534/0xf30
 xfrm_alloc_userspi+0x70b/0xc90
 xfrm_user_rcv_msg+0x7a3/0xab0
 netlink_rcv_skb+0x208/0x470
 xfrm_netlink_rcv+0x79/0x90
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f87b118ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f87af3f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f87b13b5fa0 RCX: 00007f87b118ebe9
RDX: 0000000000000000 RSI: 0000200000000840 RDI: 0000000000000005
RBP: 00007f87b1211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f87b13b6038 R14: 00007f87b13b5fa0 R15: 00007ffc81ab4848
 </TASK>
