rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10498 ticks this GP) idle=ad3c/1/0x4000000000000000 softirq=13600/13601 fqs=5226
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1266831          0            0
rcu: 	cputime:     7699      44790           35   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=9645 q=4468 ncpus=2)
CPU: 0 UID: 0 PID: 5869 Comm: syz.2.43 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:packet_rcv+0x4/0x16f0
Code: 8c 37 ff ff ff 4c 89 f7 e8 99 df c1 f7 e9 2a ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 41 57 41 56 41 55 41 54 53 48 83 ec 48 48 89 4c 24 40 49 89 d6
RSP: 0018:ffffc90000007530 EFLAGS: 00000246
RAX: 1ffff11022c0ab32 RBX: ffffffff8a6e9f00 RCX: ffff8881752d0000
RDX: ffff888117c4c940 RSI: ffff8881752d0000 RDI: ffff888116055800
RBP: dffffc0000000000 R08: ffff8881118ac1a3 R09: 1ffff11022315834
R10: dffffc0000000000 R11: ffffffff8a6e9f00 R12: ffff888116055800
R13: ffff8881752d0198 R14: ffff888116055990 R15: ffff888117c4c940
FS:  00007fadae5f66c0(0000) GS:ffff88818dcb8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c38a26d CR3: 00000001b97c8000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 dev_queue_xmit_nit+0xa2c/0xac0
 dev_hard_start_xmit+0x1c1/0x830
 __dev_queue_xmit+0x1435/0x37f0
 ip6_output+0x337/0x540
 ndisc_send_skb+0xcb2/0x1650
 addrconf_rs_timer+0x2d2/0x6c0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x225/0x840
 __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:finish_task_switch+0x41a/0xbc0
Code: 03 00 00 41 c7 84 24 e0 0d 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 d0 46 10 0a e8 1b de 38 00 fb 4c 8b 65 c8 <49> 8d bc 24 c8 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc90006eef3a0 EFLAGS: 00000202
RAX: 0000000000032fa7 RBX: ffff88812103bc60 RCX: 0000000080000001
RDX: 0000000000000007 RSI: ffffffff8dfa1050 RDI: ffffffff8c2897a0
RBP: ffffc90006eef3f0 R08: ffffffff902f72f7 R09: 1ffffffff205ee5e
R10: dffffc0000000000 R11: fffffbfff205ee5f R12: ffff888110535940
R13: ffff888110535940 R14: dffffc0000000000 R15: 1ffff1102420778c
 __schedule+0x1848/0x57a0
 preempt_schedule_common+0x82/0xd0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irqrestore+0x74/0x80
 debug_check_no_obj_freed+0x483/0x530
 __free_frozen_pages+0x593/0xd30
 __slab_free+0x274/0x2c0
 qlist_free_all+0x99/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x2b8/0x650
 alloc_empty_file+0x5b/0x1d0
 path_openat+0x10f/0x3890
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x113/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fadb039ce59
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:00007fadae5f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fadb0616090 RCX: 00007fadb039ce59
RDX: 00000000000026e1 RSI: 00002000000000c0 RDI: ffffffffffffff9c
RBP: 00007fadb0432e6f R08: 0000000000000000 R09: 0000000000000000
R10: 000003a0ffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fadb0616128 R14: 00007fadb0616090 R15: 00007ffc86141b38
 </TASK>
sched: DL replenish lagged too much
