FAT-fs (loop4): error, fat_get_cluster: invalid cluster chain (i_pos 17)
INFO: rcu_preempt self-detected stall on CPU
	0-...: (10500 ticks this GP) idle=52a/140000000000002/0 softirq=67583/67583 fqs=4818 
	 (t=10500 jiffies g=21733 c=21732 q=269)
NMI backtrace for cpu 0
CPU: 0 PID: 28810 Comm: syz-executor.3 Not tainted 4.14.174-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
 rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:save_stack_address arch/x86/kernel/stacktrace.c:29 [inline]
RIP: 0010:save_stack_address+0x1a/0x60 arch/x86/kernel/stacktrace.c:15
RSP: 0000:ffff8880aea07898 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000003 RBX: ffff8880aea07938 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff84f939e5 RDI: ffff8880aea07938
RBP: ffffffff84f939e5 R08: 0000000000000001 R09: ffff8880aea07ba0
R10: ffff8880aea078e5 R11: 0000000000058071 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88801e654140 R15: ffff88802558307f
 __save_stack_trace+0x5e/0xd0 arch/x86/kernel/stacktrace.c:46
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696
 __kmalloc_reserve.isra.0+0x35/0xd0 net/core/skbuff.c:137
 __alloc_skb+0xca/0x4c0 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:980 [inline]
 mrp_pdu_init net/802/mrp.c:303 [inline]
 mrp_pdu_append_vecattr_event+0x6f1/0xfa0 net/802/mrp.c:402
 mrp_attr_event+0x151/0x1e0 net/802/mrp.c:497
 mrp_mad_event+0x47/0x60 net/802/mrp.c:577
 mrp_join_timer+0x2f/0x80 net/802/mrp.c:594
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0033:0x40506e
RSP: 002b:00007ff3252e7c90 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: c8f017b5c0206500 RBX: 000000000076c048 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000076c040
RBP: 000000000076c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000076c04c
R13: 0000000000000a19 R14: 00007ff3252e89c0 R15: 000000000076c04c
INFO: rcu_sched detected stalls on CPUs/tasks:
	0-...: (10502 ticks this GP) idle=52a/140000000000001/0 softirq=67583/67583 fqs=4819 
	(detected by 1, t=10543 jiffies, g=16836, c=16835, q=6)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 28810 Comm: syz-executor.3 Not tainted 4.14.174-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88801e654140 task.stack: ffff88801e908000
RIP: 0010:__perf_event_header__init_id.isra.0+0x77/0x430 kernel/events/core.c:5766
RSP: 0000:ffff8880aea070d0 EFLAGS: 00000807
RAX: dffffc0000000000 RBX: ffff8880a8026a00 RCX: 0000000000000000
RDX: 1ffff11015d40e3a RSI: ffff8880aea07300 RDI: ffff8880aea07338
RBP: ffff8880aea07300 R08: 0000000000000000 R09: 00000000000a6012
R10: ffff88801e654a10 R11: ffff88801e654140 R12: ffff8880aea071d6
R13: 0000000000000000 R14: ffff8880aea071d4 R15: ffff8880aea071d0
FS:  00007ff3252e8700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff3252c6db8 CR3: 000000005836f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 perf_prepare_sample+0x19d/0x12f0 kernel/events/core.c:6146
 __perf_event_output kernel/events/core.c:6270 [inline]
 perf_event_output_forward+0xc9/0x1f0 kernel/events/core.c:6288
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7526
 perf_swevent_hrtimer+0x220/0x350 kernel/events/core.c:8736
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:46 [inline]
RIP: 0010:stack_access_ok+0x33/0x130 arch/x86/kernel/unwind_orc.c:279
RSP: 0000:ffff8880aea07750 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000002 RBX: ffff8880aea07828 RCX: 1ffff11015d40f05
RDX: 00000000000000a8 RSI: ffff88801e90ff58 RDI: ffff8880aea07828
RBP: ffff88801e90ff58 R08: ffffffff8950dbba R09: ffff8880aea07ff8
R10: ffff8880aea0785d R11: 0000000000058071 R12: ffff8880aea07828
R13: ffff8880aea07860 R14: ffff8880aea07870 R15: 0000000000000002
 deref_stack_regs arch/x86/kernel/unwind_orc.c:304 [inline]
 unwind_next_frame+0xd5a/0x17a0 arch/x86/kernel/unwind_orc.c:437
 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc_node mm/slab.c:3333 [inline]
 kmem_cache_alloc_node_trace+0x144/0x7b0 mm/slab.c:3659
 __do_kmalloc_node mm/slab.c:3681 [inline]
 __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696
 __kmalloc_reserve.isra.0+0x35/0xd0 net/core/skbuff.c:137
 __alloc_skb+0xca/0x4c0 net/core/skbuff.c:205
 alloc_skb include/linux/skbuff.h:980 [inline]
 mrp_pdu_init net/802/mrp.c:303 [inline]
 mrp_pdu_append_vecattr_event+0x6f1/0xfa0 net/802/mrp.c:402
 mrp_attr_event+0x151/0x1e0 net/802/mrp.c:497
 mrp_mad_event+0x47/0x60 net/802/mrp.c:577
 mrp_join_timer+0x2f/0x80 net/802/mrp.c:594
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0033:0x40506e
RSP: 002b:00007ff3252e7c90 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
RAX: c8f017b5c0206500 RBX: 000000000076c048 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000076c040
RBP: 000000000076c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000076c04c
R13: 0000000000000a19 R14: 00007ff3252e89c0 R15: 000000000076c04c
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ac 03 00 00 4c 89 e2 4c 89 6d 38 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85