rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=1e74/1/0x4000000000000000 softirq=15316/15317 fqs=5064
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1243022          0            0
rcu: 	cputime:    30295      22184           80   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=8169 q=2645 ncpus=2)
CPU: 0 UID: 0 PID: 6061 Comm: syz.2.47 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:__kernel_text_address+0x0/0x40
Code: c1 03 38 c1 7c c1 48 c7 c7 80 67 a3 8f e8 e8 b0 96 00 eb b3 66 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 53 48 89 fb e8 43 00 00 00 85 c0 0f 95 c0 48 81 fb 00
RSP: 0018:ffffc90000007500 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90000007570 RCX: 17599ca308a9a500
RDX: 0000000000000002 RSI: ffffffff8d9ba17b RDI: ffffffff81ad78be
RBP: ffffc900000075b0 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: ffff888023859cc0
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000eae
FS:  00007fe1673b86c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f35753fc8 CR3: 00000000209e6000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 __kfence_alloc+0x2b2/0x3b0
 kmem_cache_alloc_node_noprof+0x315/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 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 ab 8a 14 f6 e8 76 e7 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:ffffc9000402fd40 EFLAGS: 00000286
RAX: 17599ca308a9a500 RBX: 0000000000000000 RCX: 17599ca308a9a500
RDX: 0000000000000000 RSI: ffffffff8d9ba17b RDI: 0000000000000001
RBP: ffffc9000402fde0 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000805fa8
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70
Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc9000402fea8 EFLAGS: 00000246
RAX: ffffffff81b364f1 RBX: ffffc9000402ff58 RCX: ffff888023859cc0
RDX: ffffc9000f3bb000 RSI: 000000000000054c RDI: ffffc9000402ff58
RBP: ffffc9000402ff48 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: 00000000000000ca
R13: 00000000000000ca R14: dffffc0000000000 R15: ffff888023859cc0
 __x64_sys_futex+0x21/0xf0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe16658eba9
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:00007fe1673b80e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fe1667d5fa8 RCX: 00007fe16658eba9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fe1667d5fac
RBP: 00007fe1667d5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe1667d6038 R14: 00007ffe3f96b400 R15: 00007ffe3f96b4e8
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 105401741534 wd_nsec: 105401738389
