rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (7213 ticks this GP) idle=26e/1/0x4000000000000002 softirq=240541/240541 fqs=5232 
	(t=10500 jiffies g=344317 q=1151)
NMI backtrace for cpu 0
CPU: 0 PID: 21371 Comm: syz-executor.4 Not tainted 5.2.0-rc4+ #27
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2625 [inline]
 rcu_sched_clock_irq.cold+0x4d1/0xbfd kernel/rcu/tree.c:2161
 update_process_times+0x32/0x80 kernel/time/timer.c:1639
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1298
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x33b/0xdd0 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1066
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806
 </IRQ>
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:762 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/paravirt.h:784 [inline]
RIP: 0010:lock_is_held_type+0x91/0x320 kernel/locking/lockdep.c:4337
Code: b2 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 58 02 00 00 48 83 3d 0f b4 5b 07 00 0f 84 0a 02 00 00 9c 58 <0f> 1f 44 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 45 c0 48 c7 c0
RSP: 0018:ffff888042c9f550 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000286 RBX: ffff888042c9f688 RCX: ffffc90005ab1000
RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: ffff888055de88bc
RBP: ffff888042c9f598 R08: ffff888055de8040 R09: ffffed1015d06be0
R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: ffff888055de8040
R13: ffff888091d08a00 R14: ffff888045776410 R15: ffff888095b118c2
 lock_is_held include/linux/lockdep.h:356 [inline]
 xa_entry include/linux/xarray.h:1144 [inline]
 xas_descend+0x2a8/0x370 lib/xarray.c:203
 xas_load+0xef/0x150 lib/xarray.c:239
 find_get_entry+0x144/0x770 mm/filemap.c:1506
 pagecache_get_page+0x4c/0x850 mm/filemap.c:1608
 find_get_page include/linux/pagemap.h:260 [inline]
 generic_file_buffered_read mm/filemap.c:2020 [inline]
 generic_file_read_iter+0x711/0x2980 mm/filemap.c:2297
 ext4_file_read_iter+0x180/0x3c0 fs/ext4/file.c:77
 call_read_iter include/linux/fs.h:1866 [inline]
 generic_file_splice_read+0x4af/0x800 fs/splice.c:307
 do_splice_to+0x127/0x180 fs/splice.c:877
 splice_direct_to_actor+0x2d2/0x970 fs/splice.c:954
 do_splice_direct+0x1da/0x2a0 fs/splice.c:1063
 do_sendfile+0x597/0xd00 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1511
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459279
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f11868b6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459279
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 00008000fffffffe R11: 0000000000000246 R12: 00007f11868b76d4
R13: 00000000004c6835 R14: 00000000004db7a8 R15: 00000000ffffffff