FAT-fs (loop0): Directory bread(block 119) failed
FAT-fs (loop0): Directory bread(block 120) failed
FAT-fs (loop0): Directory bread(block 121) failed
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=8ee/1/0x4000000000000004 softirq=110738/110740 fqs=0 
rcu: 	 (t=10500 jiffies g=156309 q=53)
rcu: rcu_preempt kthread starved for 10500 jiffies! g156309 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I29104    10      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2826 [inline]
 __schedule+0x866/0x1dc0 kernel/sched/core.c:3474
 schedule+0x92/0x1c0 kernel/sched/core.c:3518
 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1804
 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
NMI backtrace for cpu 0
CPU: 0 PID: 1638 Comm: syz-executor.4 Not tainted 4.19.71 #0
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+0x1b0/0x1f8 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+0x189/0x1d5 kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682
 update_process_times+0x32/0x80 kernel/time/timer.c:1636
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x1a/0x20 kernel/kcov.c:176
Code: 8b 4d 08 e8 18 ff ff ff 5d c3 66 0f 1f 44 00 00 55 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 48 89 e5 48 8b 4d 08 e8 f6 fe ff ff <5d> c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 bf 03 00 00 00 48 89 e5 48
RSP: 0018:ffff8880ae8074c8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000502 RBX: ffff8880936ae778 RCX: ffffffff858e8a2e
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff8880ae8074c8 R08: ffff88805aad2280 R09: 0000000000000007
R10: ffff88805aad2c18 R11: 00000000163e0c8e R12: dffffc0000000000
R13: ffff8880936ae4c0 R14: ffff8880936ae818 R15: ffff8880936ae810
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 list_move_tail include/linux/list.h:183 [inline]
 hhf_dequeue+0x65e/0xa00 net/sched/sch_hhf.c:438
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398
 __dev_xmit_skb net/core/dev.c:3501 [inline]
 __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 neigh_resolve_output net/core/neighbour.c:1369 [inline]
 neigh_resolve_output+0x5b7/0x980 net/core/neighbour.c:1349
 neigh_output include/net/neighbour.h:501 [inline]
 ip6_finish_output2+0xb7f/0x2550 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0xf3b/0x1460 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6d0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x30f/0x680 net/ipv6/addrconf.c:3821
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1682 [inline]
 __run_timers kernel/time/timer.c:1650 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:_raw_spin_lock+0x3d/0x40 kernel/locking/spinlock.c:145
Code: 45 31 c9 41 b8 01 00 00 00 31 c9 ff 75 08 49 8d 7c 24 18 31 d2 31 f6 e8 a1 b6 5e fa 4c 89 e7 e8 99 7b 5f fa 4c 8b 65 f8 58 c9 <c3> 66 90 55 48 89 e5 41 55 41 89 f5 41 54 49 89 fc bf 01 00 00 00
RSP: 0018:ffff888082eb7948 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: ffffffff8321ce19 RBX: ffff888082eb7b58 RCX: ffffffff815366e8
RDX: 1ffff11012eb53d2 RSI: 0000000000000004 RDI: ffff8880975a9e80
RBP: ffff888082eb7968 R08: 1ffff11012eb53d0 R09: ffffed1012eb53d1
R10: ffffed1012eb53d0 R11: ffff8880975a9e83 R12: ffff8880975a9e80
R13: ffff888082eb7b50 R14: 0000000000000002 R15: ffff8880975a9e00
 legitimize_path.isra.0+0x87/0x1c0 fs/namei.c:625
 unlazy_walk+0x113/0x560 fs/namei.c:677
 complete_walk+0xcf/0x250 fs/namei.c:790
 path_lookupat.isra.0+0x266/0x8d0 fs/namei.c:2322
 filename_lookup+0x1b0/0x410 fs/namei.c:2348
 user_path_at_empty+0x43/0x50 fs/namei.c:2608
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x129/0x200 fs/stat.c:185
 vfs_lstat include/linux/fs.h:3133 [inline]
 __do_sys_newlstat+0xa4/0x130 fs/stat.c:350
 __se_sys_newlstat fs/stat.c:344 [inline]
 __x64_sys_newlstat+0x54/0x80 fs/stat.c:344
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458ca5
Code: d4 ff ff ff 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 c7 c2 d4 ff ff ff f7 d8 64 89
RSP: 002b:00007ffdd521bc08 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000458ca5
RDX: 00007ffdd521bc20 RSI: 00007ffdd521bc20 RDI: 00007ffdd521bcb0
RBP: 00000000000001ef R08: 0000000000000000 R09: 0000000000000010
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffdd521cd40
R13: 000000000193d940 R14: 0000000000000000 R15: 00007ffdd521cd40