rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=707c/1/0x4000000000000000 softirq=27784/27797 fqs=5004
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1082398          0            0
rcu: 	cputime:    30185      22293           82   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=20461 q=2402 ncpus=2)
CPU: 0 UID: 0 PID: 9117 Comm: syz.1.973 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:__read_once_word_nocheck+0x3/0x10
Code: b0 00 48 ba 00 00 00 00 00 fc ff df e9 88 fc ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 07 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000007450 EFLAGS: 00000202
RAX: ffffffff8b7ac01a RBX: ffffc900071c7ee8 RCX: 1ffff92000000e01
RDX: ffffffff9042b5d6 RSI: 0000000000000002 RDI: ffffc900071c7ee8
RBP: 1ffff92000000ea6 R08: 0000000000000012 R09: ffffffff8172d195
R10: ffffc90000007578 R11: ffffffff81ac5140 R12: ffffc900071c8000
R13: 1ffff92000000ea7 R14: ffffc90000007528 R15: ffffc900071c0000
FS:  00007fb5239c36c0(0000) GS:ffff8880b8611000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001fe58000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0xc3c/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kmem_cache_free+0x18f/0x400
 netlink_broadcast_filtered+0x1188/0x12c0
 nlmsg_notify+0xf0/0x1a0
 __neigh_notify+0x1ae/0x310
 neigh_timer_handler+0xaf1/0x1150
 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:in_lock_functions+0x1a/0x30
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 81 ff e0 a9 7d 8b 0f 93 c0 48 81 ff ad ef 7d 8b 0f 92 c1 20 c1 <0f> b6 c1 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc900071c7e68 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff82353663 RCX: ffffffff99ac4300
RDX: ffffc90003ec2000 RSI: 0000000000000591 RDI: ffffffff82353663
RBP: 0000000000000000 R08: ffff88801dc4732f R09: 1ffff11003b88e65
R10: dffffc0000000000 R11: ffffed1003b88e66 R12: 0000000000005452
R13: 0000000000000003 R14: ffff88810783bf60 R15: dffffc0000000000
 preempt_count_add+0x91/0x1a0
 fput+0x23/0xd0
 __se_sys_ioctl+0x168/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb522b8ec29
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:00007fb5239c3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb522dd5fa0 RCX: 00007fb522b8ec29
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007fb522c11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb522dd6038 R14: 00007fb522dd5fa0 R15: 00007ffe9e1a3f18
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 103927570473 wd_nsec: 103927572823
