INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=60990, c=60989, q=0)
All QSes seen, last rcu_sched kthread activity 10502 (4295159529-4295149027), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.3  R  running task    27600 15993   7181 0x8000000a
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2f0/0x351 kernel/sched/core.c:5143
 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline]
 check_cpu_stall kernel/rcu/tree.c:1616 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0xcb1/0xd0a kernel/rcu/tree.c:2792
 update_process_times+0x31/0x70 kernel/time/timer.c:1590
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161
 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219
 __run_hrtimer kernel/time/hrtimer.c:1220 [inline]
 __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1284
 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:411 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x26d/0x950 kernel/locking/qspinlock.c:465
RSP: 0018:ffff88807b69f7a0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000003 RBX: dffffc0000000000 RCX: fffffbfff0fc24e5
RDX: 0000000000006c99 RSI: 0000000000000001 RDI: 0000000000000282
RBP: ffff88807b69f808 R08: 0000000000000000 R09: ffff8880a5a1cb88
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880aed2c0c0 R14: ffffed1015da5820 R15: ffffffff87e12728
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:669 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:52 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:90 [inline]
 do_raw_spin_lock+0x190/0x230 kernel/locking/spinlock_debug.c:113
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:152
 spin_lock include/linux/spinlock.h:317 [inline]
 write_seqlock include/linux/seqlock.h:449 [inline]
 lock_mount_hash fs/mount.h:122 [inline]
 mntput_no_expire fs/namespace.c:1221 [inline]
 mntput_no_expire+0x197/0x850 fs/namespace.c:1204
 mntput fs/namespace.c:1272 [inline]
 drop_mountpoint+0x92/0xc0 fs/namespace.c:200
 pin_kill+0x157/0x710 fs/fs_pin.c:50
 group_pin_kill+0x5b/0x170 fs/fs_pin.c:101
 namespace_unlock+0xe5/0xf0 fs/namespace.c:1450
 drop_collected_mounts+0x82/0x90 fs/namespace.c:1879
 put_mnt_ns fs/namespace.c:3322 [inline]
 put_mnt_ns+0x4d/0x70 fs/namespace.c:3318
 free_nsproxy+0x47/0x200 kernel/nsproxy.c:176
 switch_task_namespaces+0x98/0xb0 kernel/nsproxy.c:229
 exit_task_namespaces+0x18/0x20 kernel/nsproxy.c:234
 do_exit+0x7b9/0x2c80 kernel/exit.c:853
 do_group_exit+0x111/0x330 kernel/exit.c:951
 get_signal+0x381/0x1cd0 kernel/signal.c:2413
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode+0x1b5/0x220 arch/x86/entry/common.c:199
 retint_user+0x8/0x18
RIP: 0033:0x45d82a
RSP: 002b:00007f46b0d13c58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000000 RBX: 000000000075bf28 RCX: 000000000045d82a
RDX: 0000000000000000 RSI: 00007f46b0d13c60 RDI: 0000000000000001
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 00000000004c0b20 R14: 00000000004d47b0 R15: 000000000075bf2c
rcu_sched kthread starved for 10502 jiffies! g60990 c60989 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_sched       R  running task    29776     9      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746
 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404