rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=ced4/1/0x4000000000000000 softirq=16408/16410 fqs=4953
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1098749          0            0
rcu: 	cputime:    30497      21982           87   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10301 q=2531 ncpus=2)
CPU: 1 UID: 0 PID: 6239 Comm: syz.1.89 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:validate_xmit_skb+0x7d7/0x11b0
Code: ef ee 5c f8 49 bd 00 00 00 00 00 fc ff df 4d 8d 66 74 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 9e 07 00 00 45 8b 24 24 <31> ff 44 89 e6 e8 ff f2 5c f8 45 85 e4 0f 84 a5 00 00 00 4c 89 e9
RSP: 0000:ffffc90004fc7180 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 041c00008001c869 RCX: ffff888022028000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004fc7270 R08: ffff888022028000 R09: 0000000000000002
R10: 0000000000004888 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888032932900 R15: ffff88810842cc00
FS:  00007f6cce1906c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 000000010fb54000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 validate_xmit_skb_list+0x84/0x120
 sch_direct_xmit+0xd3/0x4b0
 __dev_queue_xmit+0x1857/0x3b50
 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+0x57/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7f6ccd38ebb1
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00007f6cce190038 EFLAGS: 00000217
RAX: 0000000000000000 RBX: 00007f6ccd5d5fa0 RCX: 00007f6ccd38eba9
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007f6ccd411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ccd5d6038 R14: 00007f6ccd5d5fa0 R15: 00007fff1556f228
 </TASK>
sched: DL replenish lagged too much
