rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=8b1c/1/0x4000000000000000 softirq=66174/66175 fqs=1121
rcu: 	(t=10500 jiffies g=49561 q=1228 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 8243 jiffies! g49561 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=21723
rcu: rcu_preempt kthread starved for 8244 jiffies! g49561 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:27160 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:kasan_check_range+0x6f/0x2c0
Code: 1e fa 4c 39 cf 0f 82 58 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 <48> bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83
RSP: 0018:ffffc900001e0888 EFLAGS: 00000a06
RAX: 0000000000000001 RBX: ffff88810a27bd00 RCX: ffffffff8b7d1e5c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88810a27bd00
RBP: ffffc900001e09b8 R08: ffff88810a27bd03 R09: 1ffff1102144f7a0
R10: dffffc0000000000 R11: ffffed102144f7a0 R12: 1ffff9200003c120
R13: 0000000000000001 R14: ffffc900001e0920 R15: 1ffff1102144f7a0
FS:  0000000000000000(0000) GS:ffff8881a3c14000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d72ef5000 CR3: 000000010fe62000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 native_queued_spin_lock_slowpath+0xbc/0x8e0
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 __xfrm_state_delete+0xba/0xca0
 xfrm_timer_handler+0x18f/0xa00
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 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 73 b7 0d 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: e908642af0387000 RBX: ffffffff819683f8 RCX: e908642af0387000
RDX: 0000000000000001 RSI: ffffffff8d9b9d08 RDI: ffffffff8be33880
RBP: ffffc90000177f20 R08: ffff888136632f9b R09: 1ffff11026cc65f3
R10: dffffc0000000000 R11: ffffed1026cc65f4 R12: ffffffff8fa39230
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: 15728 Comm: syz.0.2538 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:xfrm_alloc_spi+0x512/0xf30
Code: de e8 82 55 9d f7 85 db 0f 85 0a 01 00 00 e8 35 51 9d f7 eb 05 e8 2e 51 9d f7 49 83 c5 28 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ef e8 f4 c4 00 f8 4d 8b 6d 00 4d 85 ed 0f 84 84 00 00
RSP: 0018:ffffc90008a9f0e0 EFLAGS: 00000246
RAX: 1ffff11006bede35 RBX: 0000000036040000 RCX: ffff88801e591cc0
RDX: 0000000000000000 RSI: 0000000013030000 RDI: 0000000036040000
RBP: ffffc90008a9f230 R08: 0000000000000000 R09: ffffffff8a225ac0
R10: dffffc0000000000 R11: fffff52001153e0c R12: dffffc0000000000
R13: ffff888035f6f1a8 R14: 0000000013030000 R15: ffffc90008a9f6a0
FS:  00007fc1735c06c0(0000) GS:ffff8880b8614000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31f63fff CR3: 000000003e894000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 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: 0033:0x7fc17278ebe9
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:00007fc1735c0038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc1729c5fa0 RCX: 00007fc17278ebe9
RDX: 0000000000000000 RSI: 0000200000000840 RDI: 0000000000000004
RBP: 00007fc172811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc1729c6038 R14: 00007fc1729c5fa0 R15: 00007ffc19e1fbb8
 </TASK>
