rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=969c/1/0x4000000000000000 softirq=40619/40620 fqs=5205
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5253          0            0
rcu: 	cputime:      337          0        52137   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=33621 q=2621 ncpus=2)
CPU: 0 UID: 0 PID: 11508 Comm: syz.2.2400 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+0x37/0x70
Code: 08 80 a0 92 65 8b 15 c8 d1 e0 10 81 e2 00 01 ff 00 74 11 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
RSP: 0018:ffffc9000310f0d8 EFLAGS: 00000246
RAX: ffffffff8a21fc62 RBX: 0000000007000000 RCX: ffff8881085cb980
RDX: 0000000000000002 RSI: 0000000008000000 RDI: 0000000007000000
RBP: ffffc9000310f230 R08: 0000000000000000 R09: ffffffff8a21fa50
R10: dffffc0000000000 R11: fffff52000621e0c R12: dffffc0000000000
R13: ffff888027521680 R14: 0000000008000000 R15: ffffc9000310f6a0
FS:  00007efd8f6436c0(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd8f642fc8 CR3: 0000000033718000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xfrm_alloc_spi+0x4b2/0xf30
 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: 0033:0x7efd8e78eba9
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:00007efd8f643038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007efd8e9d5fa0 RCX: 00007efd8e78eba9
RDX: 0000000000000000 RSI: 00002000000004c0 RDI: 0000000000000003
RBP: 00007efd8e811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efd8e9d6038 R14: 00007efd8e9d5fa0 R15: 00007ffe14384938
 </TASK>
