rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10498 ticks this GP) idle=5ca4/1/0x4000000000000000 softirq=21242/21242 fqs=5162
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   933409          0            0
rcu: 	cputime:    35810      16669           48   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=14953 q=3021 ncpus=2)
CPU: 1 UID: 0 PID: 8030 Comm: syz.5.582 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:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 5b a0 b7 f5 cc
RSP: 0018:ffffc90000a08030 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff90e88801 RCX: 0000000000000304
RDX: ffffc90000a08101 RSI: ffffffff8be74060 RDI: ffffffff8be74020
RBP: dffffc0000000000 R08: ffffc90000a085b8 R09: 0000000000000000
R10: ffffc90000a08178 R11: fffff52000141031 R12: ffffc90000a085c8
R13: ffffc90000a01000 R14: ffffc90000a08128 R15: ffffffff8174c0e5
FS:  00007f1f8884e6c0(0000) GS:ffff8882a9928000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001040 CR3: 00000001a553e000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 rcu_is_watching+0x15/0xb0
 unwind_next_frame+0x1a66/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x195/0x610
 skb_release_data+0x62d/0x7c0
 consume_skb+0x9e/0xf0
 nlmon_xmit+0xb0/0x100
 dev_hard_start_xmit+0x2cd/0x7f0
 __dev_queue_xmit+0x14dd/0x32a0
 ip6_output+0x340/0x550
 ndisc_send_skb+0xbaa/0x14e0
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x5a0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x7c0
 __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:_raw_spin_unlock_irqrestore+0x47/0x80
Code: f7 e8 9d 6d 24 f6 f7 c3 00 02 00 00 74 05 e8 b0 01 4f f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 14 7b 16 f6 65 8b 05 4d 18 54 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc90003b47a20 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000283 RCX: 0000000080000003
RDX: 0000000000000000 RSI: ffffffff8dad37f0 RDI: 0000000000000001
RBP: ffff88816a690000 R08: ffffffff8fced877 R09: 1ffffffff1f9db0e
R10: dffffc0000000000 R11: fffffbfff1f9db0f R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88816a690a50 R15: ffff88816a690014
 try_to_wake_up+0x7b6/0x12a0
 wake_up_q+0x85/0xd0
 __mutex_unlock_slowpath+0x6eb/0x7d0
 perf_ioctl+0x18e/0x2000
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1f8799acb9
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:00007f1f8884e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1f87c15fa0 RCX: 00007f1f8799acb9
RDX: 0000200000000c40 RSI: 0000000040082404 RDI: 000000000000000b
RBP: 00007f1f87a08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f87c16038 R14: 00007f1f87c15fa0 R15: 00007ffe80902068
 </TASK>
sched: DL replenish lagged too much
