hrtimer: interrupt took 34510 ns
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (29078 ticks this GP) idle=73e/1/0x4000000000000002 softirq=8399/8401 fqs=5247 
	(t=10500 jiffies g=5813 q=2)
NMI backtrace for cpu 1
CPU: 1 PID: 7767 Comm: syz-executor474 Not tainted 5.1.0-rc5-next-20190418 #28
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:161
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1284
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
 smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline]
RIP: 0010:seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline]
RIP: 0010:read_seqcount_begin include/linux/seqlock.h:164 [inline]
RIP: 0010:ktime_get_coarse_real_ts64+0x11e/0x2b0 kernel/time/timekeeping.c:2160
Code: 6b 92 88 48 c1 e8 03 42 80 3c 30 00 0f 85 7a 01 00 00 48 83 3d 72 44 30 07 00 0f 84 0d 01 00 00 e8 47 9f 0e 00 4c 89 ef 57 9d <0f> 1f 44 00 00 e8 38 9f 0e 00 44 8b 2d 21 e9 38 07 31 ff 44 89 ee
RSP: 0018:ffff888086fcf5f0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8880943d20c0 RBX: ffff888086fcf658 RCX: 1ffff1101287a52c
RDX: 0000000000000000 RSI: ffffffff81622749 RDI: 0000000000000293
RBP: ffff888086fcf628 R08: ffff8880943d20c0 R09: ffff8880943d2960
R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff1124d75
R13: 0000000000000293 R14: dffffc0000000000 R15: 1ffffffff1124d77
 current_time+0x6b/0x140 fs/inode.c:2145
 atime_needs_update+0x299/0x5f0 fs/inode.c:1703
 touch_atime+0xce/0x2a0 fs/inode.c:1720
 file_accessed include/linux/fs.h:2165 [inline]
 generic_file_buffered_read mm/filemap.c:2291 [inline]
 generic_file_read_iter+0x204f/0x2870 mm/filemap.c:2357
 ext4_file_read_iter+0x180/0x3c0 fs/ext4/file.c:77
 call_read_iter include/linux/fs.h:1860 [inline]
 generic_file_splice_read+0x4b4/0x800 fs/splice.c:306
 do_splice_to+0x12a/0x190 fs/splice.c:876
 splice_direct_to_actor+0x2d2/0x970 fs/splice.c:953
 do_splice_direct+0x1da/0x2a0 fs/splice.c:1062
 do_sendfile+0x597/0xd00 fs/read_write.c:1443
 __do_sys_sendfile64 fs/read_write.c:1504 [inline]
 __se_sys_sendfile64 fs/read_write.c:1490 [inline]
 __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1490
 do_syscall_64+0x103/0x670 arch/x86/entry/common.c:298
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440339
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc26f54a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440339
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00008000fffffffe R11: 0000000000000246 R12: 0000000000401bc0
R13: 0000000000401c50 R14: 0000000000000000 R15: 0000000000000000