rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=d884/1/0x4000000000000000 softirq=19746/19747 fqs=5052
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1286161          0            0
rcu: 	cputime:    30695      21783           76   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=12865 q=13839 ncpus=2)
CPU: 0 UID: 0 PID: 6638 Comm: syz.5.149 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+0x1315/0x2390
Code: 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> 01 f8 49 8d 4f 04 4c 39 e0 48 0f 46 e9 49 8d 47 fc 48 0f 47 d8
RSP: 0018:ffffc90000006e78 EFLAGS: 00000246
RAX: fffffffff24e3efd RBX: ffffffff8fe0b50c RCX: dffffc0000000000
RDX: ffffffff8fe0b504 RSI: ffffffff906188e0 RDI: ffffffff8c03d480
RBP: ffffffff8fe0b504 R08: 0000000000000003 R09: ffffffff81742d25
R10: ffffc90000006f98 R11: ffffffff81acd5a0 R12: ffffffff822ef4f4
R13: ffffffff8fe0b504 R14: ffffc90000006f48 R15: ffffffff8fe0b508
FS:  00007ff7fcbf66c0(0000) GS:ffff8880b8403000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c338393 CR3: 000000002a0be000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __set_page_owner+0x8d/0x4a0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x2365/0x2440
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x96/0x3a0
 ___slab_alloc+0xe94/0x1920
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_noprof+0x3f9/0x6e0
 dst_alloc+0x105/0x170
 icmp6_dst_alloc+0x75/0x420
 ndisc_send_skb+0x3f1/0x1510
 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 10 00 00 00 74 64 bf 01 00 00 00 e8 fb 1e 11 f6 e8 96 85 48 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:ffffc90002e2f8a0 EFLAGS: 00000286
RAX: 069c1c9f3071eb00 RBX: 0000000000000000 RCX: 069c1c9f3071eb00
RDX: 0000000000000007 RSI: ffffffff8db9e917 RDI: 0000000000000001
RBP: ffffc90002e2f940 R08: ffffffff8fc34377 R09: 1ffffffff1f8686e
R10: dffffc0000000000 R11: fffffbfff1f8686f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920005c5f14
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 bb d1 23 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90002e2fa00 EFLAGS: 00000206
RAX: 069c1c9f3071eb00 RBX: 0000000000000000 RCX: 069c1c9f3071eb00
RDX: 0000000000000000 RSI: ffffffff8dd8c926 RDI: ffffffff8c03d4e0
RBP: ffffffff820d3df0 R08: 0000000000000000 R09: ffffffff820d3df0
R10: dffffc0000000000 R11: fffff520005c5f77 R12: 0000000000000001
R13: ffff88802a509760 R14: 0000000000000001 R15: 0000000000000246
 __might_fault+0xcc/0x130
 _copy_from_user+0x28/0xb0
 __copy_msghdr+0x3c5/0x5b0
 ___sys_sendmsg+0x1a5/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff7fe98ec29
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:00007ff7fcbf6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff7febd5fa0 RCX: 00007ff7fe98ec29
RDX: 0000000030000001 RSI: 00002000000029c0 RDI: 0000000000000007
RBP: 00007ff7fea11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff7febd6038 R14: 00007ff7febd5fa0 R15: 00007ffee90ddf18
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 105850299420 wd_nsec: 105850298529
