rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=c9fc/1/0x4000000000000000 softirq=14347/14347 fqs=2668
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1141320          0            0
rcu: 	cputime:    32472      20017           81   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=5421 q=1966 ncpus=2)
rcu: rcu_preempt kthread starved for 4410 jiffies! g5421 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27320 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5876 Comm: kworker/1:3 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_power_efficient neigh_managed_work
RIP: 0010:queued_write_lock_slowpath+0x120/0x260
Code: b2 f6 f0 81 0b 00 01 00 00 43 0f b6 04 27 84 c0 74 35 89 d9 80 e1 07 80 c1 03 38 c1 7c 29 48 89 df e8 54 fd b1 f6 eb 1f f3 90 <43> 0f b6 04 27 84 c0 74 14 89 d9 80 e1 07 80 c1 03 38 c1 7c 08 48
RSP: 0018:ffffc9000457f8a0 EFLAGS: 00000206
RAX: 00000000000001ff RBX: ffffffff8f62ec60 RCX: ffffffff8b714f78
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8f62ec60
RBP: ffffc9000457f950 R08: ffffffff8f62ec63 R09: 1ffffffff1ec5d8c
R10: dffffc0000000000 R11: fffffbfff1ec5d8d R12: dffffc0000000000
R13: 1ffff920008aff18 R14: ffffc9000457f8f0 R15: 1ffffffff1ec5d8c
FS:  0000000000000000(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0431661e06 CR3: 000000000df38000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 do_raw_write_lock+0x1f2/0x260
 neigh_managed_work+0x34/0x240
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
CPU: 0 UID: 0 PID: 5996 Comm: syz.0.51 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #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:is_bpf_text_address+0x0/0x2b0
Code: 2b 54 00 be 00 02 00 00 bf 02 00 00 00 4c 89 ea e8 85 bd 5c ff 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 49 89 fe e8
RSP: 0018:ffffc900000071f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fa3d9f8e9a9 RCX: 8525ae13a6887200
RDX: 0000000000000004 RSI: ffffffff8db8655b RDI: 00007fa3d9f8e9a9
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff81ab7b5d
R10: ffffc90000006d88 R11: fffff52000000db3 R12: ffff888106a48000
R13: ffff88803872baf8 R14: 0000000000000001 R15: 1ffff92000000e52
FS:  00007fa3dae166c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f60660e56c0 CR3: 000000010b60c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 kernel_text_address+0xa5/0xe0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kvfree_call_rcu+0xbb/0x410
 neigh_remove_one+0x46d/0x4c0
 ___neigh_create+0x485/0x2260
 ip6_finish_output2+0xb4d/0x16a0
 ndisc_send_skb+0xb47/0x1400
 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:__sanitizer_cov_trace_pc+0x4/0x70
Code: 00 00 00 48 8b 3d 44 cb fb 0b 48 89 de 5b e9 23 5d 58 00 cc cc cc 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 0c 25 08 10 a0 92 65 8b 15 28 e7 df 10 81 e2
RSP: 0018:ffffc9000475feb0 EFLAGS: 00000217
RAX: ffffffff82390cf0 RBX: ffff888111f63401 RCX: 0000000000000002
RDX: ffff888106a48000 RSI: 0000000000000000 RDI: 00000000fffffdfd
RBP: 0000000000000000 R08: ffff8881034bb837 R09: 1ffff11020697706
R10: dffffc0000000000 R11: ffffed1020697707 R12: 0000000000005452
R13: 0000000000000003 R14: ffff888111f63400 R15: 00002000000006c0
 __se_sys_ioctl+0x123/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa3d9f8e9a9
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:00007fa3dae16038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa3da1b5fa0 RCX: 00007fa3d9f8e9a9
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007fa3da010d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa3da1b5fa0 R15: 00007ffcc3b24128
 </TASK>
sched: DL replenish lagged too much
