rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (2667 ticks this GP) idle=ab5c/1/0x4000000000000000 softirq=13732/13733 fqs=5232
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   652229          8            0
rcu: 	cputime:    15953      10696           17   ==> 26650(ms)
rcu: 	(t=10502 jiffies g=9713 q=3133 ncpus=2)
CPU: 0 UID: 0 PID: 6087 Comm: syz.0.60 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:unwind_next_frame+0x505/0x23c0
Code: 48 89 d8 48 29 e8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4c 8d 3c 45 00 00 00 00 49 01 ef 4c 89 f8 48 c1 e8 03 <48> b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 4c
RSP: 0018:ffffc90000005fb8 EFLAGS: 00000a02
RAX: 1ffffffff204804c RBX: ffffffff902402a4 RCX: 0000000000000021
RDX: ffffffff90240220 RSI: ffffffff909d1d4a RDI: ffffffff8c27c9a0
RBP: ffffffff90240220 R08: 0000000000000022 R09: ffffffff8e75e5e0
R10: ffffc900000060d8 R11: ffffffff81b0c390 R12: ffffffff8100012f
R13: ffffffff90240220 R14: ffffc90000006088 R15: ffffffff90240260
FS:  00007f4d38b386c0(0000) GS:ffff88818de5a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105366000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x2bc/0x650
 dst_alloc+0x105/0x170
 ip_route_output_key_hash_rcu+0x14d0/0x25d0
 ip_route_output_key_hash+0x18d/0x2a0
 ip_route_output_flow+0x2a/0x150
 inet_sk_rebuild_header+0x915/0x1da0
 __tcp_retransmit_skb+0x254/0x1640
 tcp_retransmit_skb+0x33/0x440
 tcp_xmit_retransmit_queue+0x49d/0xbc0
 tcp_ack+0x5733/0x7da0
 tcp_rcv_established+0xc22/0x2740
 tcp_v4_do_rcv+0xa90/0x1430
 tcp_v4_rcv+0x2825/0x31f0
 ip_protocol_deliver_rcu+0x221/0x440
 ip_local_deliver_finish+0x3bb/0x6f0
 NF_HOOK+0x336/0x3c0
 ip_sublist_rcv_finish+0x1f0/0x240
 ip_sublist_rcv+0x761/0xa70
 ip_list_rcv+0x3f1/0x450
 __netif_receive_skb_list_core+0x7e5/0x810
 netif_receive_skb_list_internal+0x995/0xcf0
 gro_receive_skb+0x632/0xd40
 e1000_clean_rx_irq+0x980/0x11a0
 e1000_clean+0xe8f/0x2a90
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x870
 __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:finish_task_switch+0x2ee/0x920
Code: 00 00 00 48 89 df be 04 00 00 00 e8 2c ff 9a 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 ec 02 00 00 f7 03 20 00 00 00 <0f> 85 d9 01 00 00 4c 89 ff be 04 00 00 00 e8 2f ff 9a 00 f0 41 ff
RSP: 0018:ffffc90006fdf7d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88810844a580 RCX: ffffffff81950a34
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88810844a580
RBP: ffffc90006fdf830 R08: ffff88810844a583 R09: 1ffff110210894b0
R10: dffffc0000000000 R11: ffffed10210894b1 R12: ffff8881117e5d80
R13: dffffc0000000000 R14: ffff888102eaba80 R15: ffff88810844a4c0
 __schedule+0x15e5/0x52d0
 preempt_schedule_common+0x82/0xd0
 preempt_schedule_thunk+0x16/0x30
 smp_call_function_single+0x469/0x580
 perf_install_in_context+0x5c0/0x930
 __se_sys_perf_event_open+0x192f/0x1d60
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4d37b9c799
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:00007f4d38b38028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f4d37e15fa0 RCX: 00007f4d37b9c799
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f4d37c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4d37e16038 R14: 00007f4d37e15fa0 R15: 00007ffc0dccd098
 </TASK>
sched: DL replenish lagged too much
