rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=c144/1/0x4000000000000000 softirq=17475/17476 fqs=5117
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1282989          0            0
rcu: 	cputime:    35415      17063           34   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=11937 q=10756 ncpus=2)
CPU: 1 UID: 0 PID: 6335 Comm: syz.3.93 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:nsim_ipsec_tx+0x0/0x440
Code: fa 31 c0 5b 41 5e 41 5f e9 7d 5a 83 04 cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 55 41 57 41 56 41 55 41 54 53 49 89 f6 48 89 fb 49 bc
RSP: 0018:ffffc90000a08438 EFLAGS: 00000246
RAX: ffffffff870b2250 RBX: ffff888119140000 RCX: ffff888116561d00
RDX: 0000000000000100 RSI: ffff8881bb72f200 RDI: ffff888119140dc0
RBP: ffffc90000a08510 R08: ffffffff870b220b R09: ffffffff8e560120
R10: dffffc0000000000 R11: ffffffff870b2150 R12: ffff8881bb72f200
R13: ffff888119140dc0 R14: 0000000000000001 R15: ffffffff870b220b
FS:  00007f9434eda6c0(0000) GS:ffff8882a96a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c361eb1 CR3: 0000000171130000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 nsim_start_xmit+0x165/0xd30
 dev_hard_start_xmit+0x2d8/0x870
 sch_direct_xmit+0x251/0x4c0
 __dev_queue_xmit+0x13c4/0x32f0
 ip6_output+0x340/0x550
 ndisc_send_skb+0xbaa/0x14e0
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x640
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x245/0x920
Code: 00 00 48 85 db 0f 85 e8 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 49 83 c4 48 4c 89 e7 e8 85 ca fc 09 e8 20 85 37 00 fb 4c 8b 65 c0 <49> 8d bc 24 30 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90004e06ef8 EFLAGS: 00000202
RAX: 0000000000007413 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dcf1f4e RDI: ffffffff8c076d00
RBP: ffffc90004e06f50 R08: ffffffff8ff0e0b7 R09: 1ffffffff1fe1c16
R10: dffffc0000000000 R11: fffffbfff1fe1c17 R12: ffff888116561d00
R13: dffffc0000000000 R14: ffff888112c6d700 R15: ffff88823c63b918
 __schedule+0x1546/0x5070
 preempt_schedule_common+0x82/0xd0
 preempt_schedule_thunk+0x16/0x30
 __local_bh_enable_ip+0xe1/0x130
 __alloc_skb+0x1aa/0x7d0
 netlink_ack+0x146/0xa50
 nfnetlink_rcv+0x2517/0x27b0
 netlink_unicast+0x80f/0x9b0
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x18f/0x1d0
 ____sys_sendmsg+0x589/0x8c0
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1bd/0x2a0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9433f9acb9
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:00007f9434eda028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9434215fa0 RCX: 00007f9433f9acb9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000008
RBP: 00007f9434008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9434216038 R14: 00007f9434215fa0 R15: 00007ffda73dbbf8
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 104780028410 wd_nsec: 104780029468
