rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=7fd4/1/0x4000000000000000 softirq=27920/27921 fqs=4928
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1030292          0            0
rcu: 	cputime:    30687      21791           90   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=23549 q=3181 ncpus=2)
CPU: 0 UID: 0 PID: 8698 Comm: syz.0.876 Not tainted 6.17.0-rc1-syzkaller-00022-g07866544e410-dirty #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:debug_smp_processor_id+0x12/0x20
Code: cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 c7 c7 a0 32 e3 8b 48 c7 c6 e0 32 e3 8b <eb> 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000007350 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff90babf01 RCX: ffff88810e1dd640
RDX: ffffc90000007401 RSI: ffffffff8be332e0 RDI: ffffffff8be332a0
RBP: dffffc0000000000 R08: ffffc90000007860 R09: 0000000000000000
R10: ffffc90000007498 R11: fffff52000000e95 R12: ffffc90000007870
R13: ffffc90000000000 R14: ffffc90000007448 R15: ffffffff8172c195
FS:  00007fac578196c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 000000010c878000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_is_watching+0x15/0xb0
 unwind_next_frame+0x1965/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 dst_cow_metrics_generic+0x56/0x1c0
 icmp6_dst_alloc+0x264/0x420
 ndisc_send_skb+0x41f/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 cf b7 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:ffffc900065976b8 EFLAGS: 00000286
RAX: 2b3ffa87127afd00 RBX: 0000000000000000 RCX: 2b3ffa87127afd00
RDX: 0000000000000006 RSI: ffffffff8d9b6df1 RDI: ffffffff8be33300
RBP: ffffc90006597710 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: ffff88810e1dd640
R13: dffffc0000000000 R14: ffff888027f15640 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 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 eb e3 02 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:ffffc90006597aa0 EFLAGS: 00000206
RAX: 2b3ffa87127afd00 RBX: 0000000000000000 RCX: 2b3ffa87127afd00
RDX: ffffffff93640338 RSI: ffffffff8dba603a RDI: ffffffff8be33300
RBP: ffffffff81f28b7d R08: 0000000000000100 R09: 0000000064624608
R10: 000000006c669235 R11: 00000000fda3a0a7 R12: 0000000000000000
R13: ffff88801dc47398 R14: 0000000000000001 R15: 0000000000000246
 down_write+0x96/0x1f0
 perf_fasync+0xad/0x110
 do_vfs_ioctl+0x1064/0x1430
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fac5698ebe9
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:00007fac57819038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fac56bb5fa0 RCX: 00007fac5698ebe9
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007fac56a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fac56bb6038 R14: 00007fac56bb5fa0 R15: 00007ffc8513e8f8
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 104699291741 wd_nsec: 104699299208
