rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=5874/1/0x4000000000000000 softirq=222602/222603 fqs=5108
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1345061          0            0
rcu: 	cputime:    30301      22177           72   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=216017 q=2766 ncpus=2)
CPU: 1 UID: 0 PID: 14242 Comm: syz.2.12291 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:enqueue_to_backlog+0x7b/0xee0
Code: 3e 4c 89 ff be 08 00 00 00 e8 d1 28 b2 f8 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 4b 26 b2 f8 4d 8b 37 44 89 f6 <83> e6 01 31 ff e8 cb cc 47 f8 41 f6 c6 01 0f 84 87 04 00 00 4c 63
RSP: 0018:ffffc90000a07bb0 EFLAGS: 00000246
RAX: 1ffff1102143fc15 RBX: 0000000000000001 RCX: ffffffff897dda1f
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff88810a1fe0a8
RBP: ffff8881a0a89800 R08: ffff88810a1fe0af R09: 1ffff1102143fc15
R10: dffffc0000000000 R11: ffffed102143fc16 R12: ffffc90000a07c58
R13: dffffc0000000000 R14: 0000000000000003 R15: ffff88810a1fe0a8
FS:  00007f28ad1ac6c0(0000) GS:ffff8882a945c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 000000018be7c000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 netif_rx_internal+0x120/0x590
 __netif_rx+0x78/0xc0
 veth_xmit+0x587/0xda0
 dev_hard_start_xmit+0x2d8/0x870
 __dev_queue_xmit+0x16d1/0x3890
 br_dev_queue_push_xmit+0x370/0x4a0
 NF_HOOK+0x360/0x3f0
 br_forward_finish+0xd3/0x130
 NF_HOOK+0x360/0x3f0
 __br_forward+0x397/0x540
 br_dev_xmit+0x12bd/0x1980
 dev_hard_start_xmit+0x2d8/0x870
 __dev_queue_xmit+0x16d1/0x3890
 ip6_output+0x340/0x550
 ndisc_send_skb+0xd0b/0x1670
 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:__kasan_check_read+0x0/0x20
Code: 16 8e 48 89 de e8 c0 b8 f7 fe 31 ed eb cf 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 <f3> 0f 1e fa 89 f6 48 8b 0c 24 31 d2 e9 8f e5 ff ff 66 66 66 66 66
RSP: 0018:ffffc90006c27b28 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8e8d1f60 RCX: 0000000080000002
RDX: 0000000000000002 RSI: 0000000000000004 RDI: ffffffff8e8d1f60
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000d84f60 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff8e8d1f64 R15: ffff88818db1b680
 do_raw_spin_unlock+0x4d/0x210
 _raw_spin_unlock+0x1e/0x50
 fasync_insert_entry+0x1d7/0x270
 fasync_helper+0x52/0xb0
 perf_fasync+0xc3/0x110
 do_vfs_ioctl+0x1117/0x1530
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28ac39c799
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:00007f28ad1ac028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f28ac615fa0 RCX: 00007f28ac39c799
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007f28ac432c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f28ac616038 R14: 00007f28ac615fa0 R15: 00007ffc894be268
 </TASK>
sched: DL replenish lagged too much
