rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=710c/1/0x4000000000000000 softirq=43848/43849 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1273601          0            0
rcu: 	cputime:    31880      20619           73   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=38377 q=2407 ncpus=2)
CPU: 0 UID: 0 PID: 10975 Comm: syz.7.1405 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:__dev_queue_xmit+0x9b0/0x3b50
Code: 00 00 e8 03 87 5d f8 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 84 fa c0 f8 49 83 3f 00 <74> 70 48 c7 84 24 40 01 00 00 00 00 00 00 49 8d 5f 20 48 89 d8 48
RSP: 0018:ffffc90000007460 EFLAGS: 00000282
RAX: 1ffff110062f1a00 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: ffffffff8be332e0 RDI: ffffffff8be332a0
RBP: ffffc90000007770 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff888030b3e400
R13: ffff888105b32300 R14: 0000000000000000 R15: ffff88803178d000
FS:  00007f76109786c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c32a871 CR3: 000000001fabe000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ip6_finish_output2+0x11bc/0x16a0
 ndisc_send_skb+0xb54/0x1440
 addrconf_rs_timer+0x369/0x670
 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:up_write+0x61/0x420
Code: 03 0f b6 04 28 84 c0 0f 85 67 03 00 00 83 3d c9 c0 06 0e 00 0f 85 cc 00 00 00 4c 8d 6b 68 4d 89 ee 49 c1 ee 03 41 80 3c 2e 00 <74> 08 4c 89 ef e8 25 2f 86 00 48 39 5b 68 74 12 80 3d 02 75 f0 0d
RSP: 0018:ffffc9000360fb98 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801dcbf830 RCX: 35ee7da2268a5600
RDX: 0000000000000000 RSI: ffffffff8dba5cac RDI: ffffffff8be33300
RBP: dffffc0000000000 R08: ffff888028f5e003 R09: 1ffff110051ebc00
R10: dffffc0000000000 R11: ffffed10051ebc01 R12: ffff88801dcbf830
R13: ffff88801dcbf898 R14: 1ffff11003b97f13 R15: ffff888031c0e838
 perf_fasync+0xcd/0x110
 do_vfs_ioctl+0x1064/0x1430
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f760fb8ebe9
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:00007f7610978038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f760fdb5fa0 RCX: 00007f760fb8ebe9
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000007
RBP: 00007f760fc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f760fdb6038 R14: 00007f760fdb5fa0 R15: 00007ffc67e38b18
 </TASK>
