rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=b09c/1/0x4000000000000000 softirq=26493/26494 fqs=5162
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1240359          0            0
rcu: 	cputime:    31649      20839           75   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=20405 q=2122 ncpus=2)
CPU: 1 UID: 0 PID: 8572 Comm: syz.0.744 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:deref_stack_reg+0x1b3/0x230
Code: 39 f0 0f 96 c0 20 c8 3c 01 75 30 4c 89 c7 49 89 f7 e8 11 08 00 00 49 89 c6 48 8b 5c 24 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 93 4b b0 00 4c 89 33 b0 01 eb 02 31 c0 48 83 c4
RSP: 0018:ffffc900001e0160 EFLAGS: 00000246
RAX: 1ffff9200003c059 RBX: ffffc900001e02c8 RCX: 0000000000000001
RDX: ffffc900001e02c8 RSI: dffffc0000000000 RDI: ffffc900075a6b48
RBP: 1ffff9200003c051 R08: ffffc900075a6b48 R09: 0000000000000000
R10: ffffc900001e02d8 R11: fffff5200003c05d R12: 1ffff9200003c052
R13: 1ffff9200003c053 R14: 1ffffffff1b7b48f R15: dffffc0000000000
FS:  00007f80d72216c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000cf3d CR3: 000000010d670000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x17c4/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x27a/0x4f0
 ___neigh_create+0x6d5/0x2260
 ip6_finish_output2+0xb4d/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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 eb 8e 14 f6 e8 56 eb 4b f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900075a6580 EFLAGS: 00000282
RAX: 1ea59e310b7a7800 RBX: 0000000000000000 RCX: 1ea59e310b7a7800
RDX: 0000000000000000 RSI: ffffffff8d9ba163 RDI: 0000000000000001
RBP: ffffc900075a6630 R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: fffffbfff1f47507 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000eb4cb0
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0xa90/0x2390
Code: c4 48 8d 5e 01 48 8b 44 24 40 0f b6 04 28 84 c0 0f 85 78 13 00 00 49 89 df 49 c1 ef 03 41 0f b6 04 2f 84 c0 0f 85 88 13 00 00 <0f> b6 76 01 83 e6 07 83 fe 04 4c 89 64 24 10 0f 84 49 04 00 00 83
RSP: 0018:ffffc900075a66f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff9033757b RCX: ffffffff8fb777c4
RDX: ffffffff90337576 RSI: ffffffff9033757a RDI: ffffffff8be33da0
RBP: dffffc0000000000 R08: 0000000000000009 R09: ffffffff8172d195
R10: ffffc900075a6828 R11: fffff52000eb4d11 R12: ffffc900075a6828
R13: ffffc900075a6878 R14: ffffc900075a6828 R15: 1ffffffff2066eaf
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __set_page_owner+0x8d/0x4a0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 alloc_pages_noprof+0xa9/0x190
 get_free_pages_noprof+0xf/0x80
 kasan_populate_vmalloc+0x38/0x270
 alloc_vmap_area+0xd62/0x14a0
 __get_vm_area_node+0x1f8/0x300
 __vmalloc_node_range_noprof+0x301/0x12f0
 vmalloc_noprof+0xb2/0xf0
 bpf_prog_calc_tag+0xa7/0x440
 resolve_pseudo_ldimm64+0xbc/0xc50
 bpf_check+0x1c6a/0x1d2f0
 bpf_prog_load+0x1318/0x1930
 __sys_bpf+0x528/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f80d638eba9
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:00007f80d7221038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f80d65d5fa0 RCX: 00007f80d638eba9
RDX: 0000000000000048 RSI: 000020000000e000 RDI: 0000000000000005
RBP: 00007f80d6411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f80d65d6038 R14: 00007f80d65d5fa0 R15: 00007fff71574bf8
 </TASK>
sched: DL replenish lagged too much
