rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10501 ticks this GP) idle=9504/1/0x4000000000000000 softirq=19885/19885 fqs=3
rcu: 	(t=10501 jiffies g=14381 q=677 ncpus=2)
rcu: rcu_preempt kthread starved for 10179 jiffies! g14381 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:26984 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 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: 7249 Comm: syz.0.392 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:__dev_queue_xmit+0x6ac/0x3b50
Code: 0f b7 d8 ff cb 41 0f af dc 48 8b 84 24 c8 00 00 00 42 0f b6 04 38 84 c0 0f 85 2d 1f 00 00 48 8b 44 24 50 01 18 e9 8f 00 00 00 <48> b8 00 00 00 00 00 fc ff df 41 80 3c 04 00 74 08 48 89 df e8 4b
RSP: 0018:ffffc900001e0460 EFLAGS: 00000246
RAX: ffffffff896224e4 RBX: ffff88810f1c6790 RCX: 0000000000000100
RDX: ffff88810e825640 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0770 R08: 0000000000000000 R09: ffffffff896223fb
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: 1ffff11021e38cf2
R13: 1ffff11021e38d02 R14: 0000000000000000 R15: ffff88810f1c6810
FS:  00007fdb269c86c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558c7915c8 CR3: 000000010f996000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 ip6_finish_output2+0x11fe/0x16a0
 ndisc_send_skb+0xb54/0x1440
 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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 3f c4 ea 09 e8 5a 3f 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90009cc72b8 EFLAGS: 00000286
RAX: 7f2d0e2aa3e41400 RBX: 0000000000000000 RCX: 7f2d0e2aa3e41400
RDX: 0000000000000000 RSI: ffffffff8d9b6a61 RDI: ffffffff8be33380
RBP: ffffc90009cc7310 R08: ffffffff8fa38137 R09: 1ffffffff1f47026
R10: dffffc0000000000 R11: fffffbfff1f47027 R12: ffff88810e825640
R13: dffffc0000000000 R14: ffff888023375640 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 unix_stream_read_generic+0x18a6/0x2480
 unix_stream_recvmsg+0x15d/0x1b0
 sock_recvmsg+0x22c/0x270
 ____sys_recvmsg+0x1c9/0x460
 ___sys_recvmsg+0x1b5/0x510
 __x64_sys_recvmsg+0x198/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb25b8ebe9
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:00007fdb269c8038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fdb25db5fa0 RCX: 00007fdb25b8ebe9
RDX: 0000000000000020 RSI: 0000200000000340 RDI: 000000000000000b
RBP: 00007fdb25c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdb25db6038 R14: 00007fdb25db5fa0 R15: 00007ffd06ebd628
 </TASK>
CPU: 0 UID: 0 PID: 7251 Comm: syz.1.393 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:lock_release+0x70/0x3e0
Code: e8 45 f1 08 00 84 c0 75 0d f6 05 0e f7 ef 0d 01 0f 84 ad 02 00 00 83 3d 8d 42 06 0e 00 0f 84 44 02 00 00 65 8b 05 40 10 03 11 <85> c0 0f 85 35 02 00 00 65 4c 8b 3c 25 08 40 a0 92 41 83 bf ec 0a
RSP: 0018:ffffc90000007050 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffffff903b0301 RCX: 18f76f573328c000
RDX: ffffc90000007101 RSI: ffffffff8be33360 RDI: ffffffff8be33320
RBP: dffffc0000000000 R08: ffffc90009b77eb8 R09: 0000000000000000
R10: ffffc900000071d8 R11: fffff52000000e3d R12: ffffc90009b77ec8
R13: ffffffff8172c195 R14: ffffffff8e139ee0 R15: ffffffff8172c195
FS:  00007f8db4a176c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdb269a7d58 CR3: 0000000027a50000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free_bulk+0x2d1/0x520
 kfree_skb_list_reason+0x3eb/0x460
 __dev_queue_xmit+0x21d3/0x3b50
 lapb_data_transmit+0x90/0xb0
 lapb_transmit_buffer+0x163/0x200
 lapb_t1timer_expiry+0x699/0xab0
 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:x2apic_send_IPI+0x73/0xe0
Code: 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 75 42 41 8b 16 0f ae f0 0f ae e8 83 fb 02 b8 00 04 00 00 0f 45 c3 b9 30 08 00 00 0f 30 <66> 90 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 89 fe 89 fd 48 c7
RSP: 0018:ffffc90009b77750 EFLAGS: 00000206
RAX: 00000000000000fb RBX: 00000000000000fb RCX: 0000000000000830
RDX: 0000000000000001 RSI: 00000000000000fb RDI: 0000000000000001
RBP: ffffc90009b77900 R08: ffffffff8fa38137 R09: 1ffffffff1f47026
R10: dffffc0000000000 R11: ffffffff81705100 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8881366201b0 R15: ffffffff8dbded18
 smp_call_function_many_cond+0xabb/0x12d0
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_enable_cpuslocked+0x128/0x250
 static_key_enable+0x1a/0x20
 tracepoint_add_func+0x994/0xa10
 tracepoint_probe_register_prio_may_exist+0x5f/0xa0
 bpf_raw_tp_link_attach+0x4f0/0x6c0
 bpf_raw_tracepoint_open+0x1b2/0x220
 __sys_bpf+0x75a/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8db3b8ebe9
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:00007f8db4a17038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8db3db5fa0 RCX: 00007f8db3b8ebe9
RDX: 0000000000000018 RSI: 0000200000000080 RDI: 0000000000000011
RBP: 00007f8db3c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8db3db6038 R14: 00007f8db3db5fa0 R15: 00007ffffcccb7b8
 </TASK>
sched: DL replenish lagged too much
