rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=5aec/1/0x4000000000000000 softirq=31432/31441 fqs=4824
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1019821          0            0
rcu: 	cputime:    30692      21787           92   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=23701 q=2199 ncpus=2)
CPU: 1 UID: 0 PID: 8530 Comm: syz.2.707 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:__rcu_read_unlock+0x39/0xe0
Code: 00 00 00 00 00 fc ff df 65 48 8b 3c 25 08 d0 a0 92 48 8d 9f 44 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 4f ff 0b <75> 1d 4c 8d b7 48 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84
RSP: 0018:ffffc900001e04f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88802be7da84 RCX: 4bb08b89962d7c00
RDX: 0000000000000001 RSI: ffffffff8dba9eed RDI: ffff88802be7d640
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81aac84d
R10: ffffc900001e05f8 R11: ffffffff81ac4d00 R12: 1ffff110057cfb50
R13: ffff88802a7d0a80 R14: 00007f957ad8eba9 R15: dffffc0000000000
FS:  00007f957bb796c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f957bb57fc8 CR3: 0000000024278000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 is_module_text_address+0x190/0x1e0
 kernel_text_address+0x94/0xe0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 ab 7a 14 f6 e8 16 d7 4b f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900024ffd40 EFLAGS: 00000286
RAX: 4bb08b89962d7c00 RBX: 0000000000000000 RCX: 4bb08b89962d7c00
RDX: 0000000000000000 RSI: ffffffff8d9ba7f1 RDI: 0000000000000001
RBP: ffffc900024ffdf0 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200049ffa8
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__se_sys_ioctl+0x82/0x170
Code: 7d 86 ff e9 cf 00 00 00 e8 3b 7d 86 ff 49 c7 c7 f7 ff ff ff e9 d7 00 00 00 4c 89 f7 44 89 ee 44 89 e2 4c 89 f9 e8 9e 0a 00 00 <89> c5 bf fd fd ff ff 89 c6 e8 50 81 86 ff 81 fd fd fd ff ff 0f 85
RSP: 0018:ffffc900024ffeb8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880227f1401 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: 0000000000000000 R08: ffff88810344332f R09: 1ffff11020688665
R10: dffffc0000000000 R11: ffffed1020688666 R12: 0000000000005452
R13: 0000000000000003 R14: ffff8880227f1400 R15: 0000200000000400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f957ad8eba9
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:00007f957bb79038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f957afd5fa0 RCX: 00007f957ad8eba9
RDX: 0000200000000400 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007f957ae11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f957afd6038 R14: 00007f957afd5fa0 R15: 00007ffe66112d48
 </TASK>
sched: DL replenish lagged too much
