rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10309 ticks this GP) idle=26d4/1/0x4000000000000000 softirq=206194/206278 fqs=5183
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   859356        290            0
rcu: 	cputime:    33231      19266           54   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=225993 q=1425 ncpus=2)
CPU: 1 UID: 0 PID: 17595 Comm: syz.6.16797 Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8 #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:rcu_read_unlock_special+0x87/0x5e0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 32 4c f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001e03e0 EFLAGS: 00000206
RAX: 950c4524be09ab00 RBX: 1ffff9200003c084 RCX: 950c4524be09ab00
RDX: 0000000000000002 RSI: ffffffff8d9b1618 RDI: ffffffff8be2fd00
RBP: ffffc900001e04d8 R08: ffffffff8fa32437 R09: 1ffffffff1f46486
R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffffffff8e13f101
R13: dffffc0000000000 R14: 0000000000000246 R15: ffff888036ae1cc0
FS:  00007fd6ce80d6c0(0000) GS:ffff8881a3c2a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555fb85c8 CR3: 000000011f0fc000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 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: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 3b 06 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:ffffc900073c76d8 EFLAGS: 00000206
RAX: 950c4524be09ab00 RBX: 0000000000000000 RCX: 950c4524be09ab00
RDX: 0000000000000000 RSI: ffffffff8dba01e6 RDI: ffffffff8be2fd00
RBP: ffffffff81745c01 R08: 0000000000000000 R09: ffffffff81745c01
R10: dffffc0000000000 R11: ffffed100417f001 R12: 0000000000000000
R13: ffffffff8dfab298 R14: 0000000000000001 R15: 0000000000000246
 _raw_spin_lock+0x2e/0x40
 pgd_free+0x51/0x1e0
 __mmdrop+0xb5/0x460
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__mutex_unlock_slowpath+0x73/0x760
Code: 41 48 c7 44 24 48 9e fb b0 8d 48 c7 44 24 50 b0 bf 78 8b 48 8d 4c 24 40 48 c1 e9 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4a 89 04 29 <42> c7 44 29 0a f2 f2 00 f3 48 89 4c 24 38 66 42 c7 44 29 0e f3 f3
RSP: 0018:ffffc900073c7be0 EFLAGS: 00000a06
RAX: f2f2f200f1f1f1f1 RBX: ffff8881077be000 RCX: 1ffff92000e78f84
RDX: 0000000000000006 RSI: ffffffff81ef9aac RDI: ffff8881077be040
RBP: ffffc900073c7cf0 R08: ffffffff8fa32437 R09: 1ffffffff1f46486
R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffff8881077be150
R13: dffffc0000000000 R14: ffffc900073c7c60 R15: ffff8881077be040
 __se_sys_perf_event_open+0x194c/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd6cd98ebe9
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:00007fd6ce80d038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fd6cdbb5fa0 RCX: 00007fd6cd98ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007fd6cda11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd6cdbb6038 R14: 00007fd6cdbb5fa0 R15: 00007ffe13eb8ae8
 </TASK>
