rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8822/1:b..l P6214/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=45965, q=1802 ncpus=2)
task:syz-executor    state:R  running task     stack:22312 pid:6214  tgid:6214  ppid:1      task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5526 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7276
 preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7455
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_read_unlock include/linux/rwlock_api_smp.h:256 [inline]
 _raw_read_unlock+0x41/0x50 kernel/locking/spinlock.c:295
 zap_pid_ns_processes+0x2b5/0x5f0 kernel/pid_namespace.c:233
 find_child_reaper kernel/exit.c:656 [inline]
 forget_original_parent kernel/exit.c:740 [inline]
 exit_notify kernel/exit.c:777 [inline]
 do_exit+0x1fd8/0x2360 kernel/exit.c:1020
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1151
 get_signal+0x121b/0x12c0 kernel/signal.c:3039
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa10435e98e
RSP: 002b:00007fa10474fd28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 0000555574702500 RCX: 00007fa10435e98e
RDX: 00007fa10474fd80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa10474fdec R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000006c
R13: 0000000000000002 R14: 000000000004afa9 R15: 00007fa10474fe40
 </TASK>
task:syz.7.717       state:R  running task     stack:26736 pid:8822  tgid:8821  ppid:6209   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5526 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7276
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7598
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:124 [inline]
RIP: 0010:lock_acquire+0x99/0x350 kernel/locking/lockdep.c:5918
Code: b4 24 88 00 00 00 4c 89 e7 e8 33 76 94 00 83 3d bc 2a d7 0e 00 0f 84 e4 00 00 00 65 8b 05 e7 bf f1 11 85 c0 0f 85 d5 00 00 00 <65> 48 8b 2d 27 7b f1 11 83 bd a4 0b 00 00 00 0f 85 c0 00 00 00 48
RSP: 0018:ffffc900056173a8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 8000000000000001
RDX: 0000000000000000 RSI: ffffffff8177f1fc RDI: 1ffffffff1dab8ec
RBP: 1ffff92000ac2ea4 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc90005617538 R11: ffffffff81b28090 R12: ffffffff8ed5c760
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
 unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:183
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
 __slab_free+0x274/0x2c0 mm/slub.c:5815
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:406
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5414 [inline]
 __kmalloc_noprof+0x36b/0x720 mm/slub.c:5439
 _kmalloc_noprof include/linux/slab.h:995 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 kobject_get_path+0xc5/0x2f0 lib/kobject.c:161
 kobject_uevent_env+0x29e/0x9e0 lib/kobject_uevent.c:548
 rx_queue_add_kobject net/core/net-sysfs.c:1259 [inline]
 net_rx_queue_update_kobjects+0x3fe/0x780 net/core/net-sysfs.c:1301
 register_queue_kobjects net/core/net-sysfs.c:2093 [inline]
 netdev_register_kobject+0x23e/0x350 net/core/net-sysfs.c:2344
 register_netdevice+0x1433/0x1eb0 net/core/dev.c:11503
 tun_set_iff+0x82b/0xf20 drivers/net/tun.c:2956
 __tun_chr_ioctl+0x7e5/0x1e70 drivers/net/tun.c:3239
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff4f3f9e159
RSP: 002b:00007ff4f4e05028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff4f4225fa0 RCX: 00007ff4f3f9e159
RDX: 0000200000000040 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007ff4f403503b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff4f4226038 R14: 00007ff4f4225fa0 R15: 00007ff4f434fa48
 </TASK>