rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10498 ticks this GP) idle=20a4/1/0x4000000000000000 softirq=13435/13437 fqs=5225
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1293777         10            0
rcu: 	cputime:     9779      42710           33   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=9501 q=7336 ncpus=2)
CPU: 1 UID: 0 PID: 5771 Comm: syz.1.14 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:__sanitizer_cov_trace_const_cmp4+0x8/0x90
Code: 89 44 11 20 e9 d9 77 e6 09 cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 15 18 af 73 11 65 8b 0d 39 af 73 11 81 e1 00 01 ff 00 74
RSP: 0018:ffffc90000a08638 EFLAGS: 00000246
RAX: ffffffff813398e0 RBX: 00007f8507d9cdd9 RCX: ffff88810fa6d880
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000001 R08: ffffffff9030bef7 R09: 1ffffffff20617de
R10: dffffc0000000000 R11: fffffbfff20617df R12: ffff88810fa6d880
R13: 00000000000000f0 R14: dffffc0000000000 R15: 1ffff920001410de
FS:  00007f8508cd16c0(0000) GS:ffff8882a9288000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f891a3ea4c0 CR3: 0000000117b6c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 in_gate_area_no_mm+0x20/0x60
 kernel_text_address+0x2d/0xe0
 __kernel_text_address+0xd/0x30
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfb/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x384/0x690
 __alloc_skb+0x1d0/0x7d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__schedule+0x17d/0x5740
Code: 2b 49 8d 5d 20 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 82 5f 87 f6 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 69 5f 87 f6 48 81 3b 9d 6e ac 57 0f 85 35 1d 00
RSP: 0018:ffffc90005be77a0 EFLAGS: 00000246
RAX: 1ffff92000b7c000 RBX: ffffc90005be0000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8c28b6c0 RDI: ffffffff8c28b680
RBP: ffffc90005be79b0 R08: ffffffff9030bef7 R09: 1ffffffff20617de
R10: dffffc0000000000 R11: fffffbfff20617df R12: 0000000000000001
R13: ffff88810fa6d880 R14: dffffc0000000000 R15: ffff8882a9288000
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x760
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__mutex_unlock_slowpath+0x107/0x6f0
Code: 8f cf 86 f6 4c 89 f8 48 c1 e8 03 48 89 44 24 20 42 80 3c 20 00 74 08 4c 89 ff e8 04 cd 86 f6 48 8d 9c 24 a0 00 00 00 49 8b 07 <49> c7 c6 e0 e3 44 9a 49 c1 ee 03 48 c7 c2 c4 f1 30 90 48 c1 ea 03
RSP: 0018:ffffc90005be7ae0 EFLAGS: 00000246
RAX: ffff88810fa6d880 RBX: ffffc90005be7b80 RCX: ffffffff8baac021
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88816b752040
RBP: ffffc90005be7bf0 R08: ffff88816b752047 R09: 1ffff1102d6ea408
R10: dffffc0000000000 R11: ffffed102d6ea409 R12: dffffc0000000000
R13: 1ffff92000b7cf64 R14: ffffc90005be7b60 R15: ffff88816b752040
 perf_ioctl+0x18e/0x20c0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8507d9cdd9
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:00007f8508cd1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8508016090 RCX: 00007f8507d9cdd9
RDX: 0000200000000280 RSI: 0000000040082404 RDI: 0000000000000008
RBP: 00007f8507e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8508016128 R14: 00007f8508016090 R15: 00007ffda62b3018
 </TASK>
sched: DL replenish lagged too much
