rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=f2fc/1/0x4000000000000000 softirq=486636/486641 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5257          0            0
rcu: 	cputime:      317          0        52172   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=226641 q=2584 ncpus=2)
CPU: 1 UID: 0 PID: 6181 Comm: syz.2.8782 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+0x0/0x70
Code: 89 fb e8 23 00 00 00 48 8b 3d c4 48 fe 0b 48 89 de 5b e9 73 98 58 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 40 a0 92 65 8b 15 e8 93
RSP: 0018:ffffc90009ec70d8 EFLAGS: 00000297
RAX: 1ffff110233fa485 RBX: 0000000088000000 RCX: ffff88810fd49cc0
RDX: 0000000000000000 RSI: 00000000f5020000 RDI: 0000000088000000
RBP: ffffc90009ec7230 R08: 0000000000000000 R09: ffffffff8a217ea0
R10: dffffc0000000000 R11: fffff520013d8e0c R12: dffffc0000000000
R13: ffff888119fd2400 R14: 00000000f5020000 R15: ffffc90009ec76a0
FS:  00007f68d02df6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9821a22fc8 CR3: 000000010c0ce000 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: 0033:0x7f68cf38ebe9
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:00007f68d02df038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f68cf5b5fa0 RCX: 00007f68cf38ebe9
RDX: 0000000000000000 RSI: 0000200000000840 RDI: 0000000000000004
RBP: 00007f68cf411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f68cf5b6038 R14: 00007f68cf5b5fa0 R15: 00007ffef7c55ce8
 </TASK>
