INFO: task syz.9.59516:32736 blocked for more than 430 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.59516     state:D stack:0     pid:32736 tgid:32736 ppid:11826  task_flags:0x400040 flags:0x00000005
Call trace: 
[<81b19cdc>] (__schedule) from [<81b1b170>] (__schedule_loop kernel/sched/core.c:7268 [inline])
[<81b19cdc>] (__schedule) from [<81b1b170>] (schedule+0x2c/0x134 kernel/sched/core.c:7283)
 r10:85186f00 r9:8400d780 r8:8495ce00 r7:84eaeb48 r6:e83ddea8 r5:e83dde50
 r4:8400d780
[<81b1b144>] (schedule) from [<80782a70>] (request_wait_answer fs/fuse/dev.c:590 [inline])
[<81b1b144>] (schedule) from [<80782a70>] (__fuse_request_send fs/fuse/dev.c:604 [inline])
[<81b1b144>] (schedule) from [<80782a70>] (__fuse_simple_request+0x3b8/0x520 fs/fuse/dev.c:699)
 r5:e83dde50 r4:84eaeaf0
[<807826b8>] (__fuse_simple_request) from [<8078bfd0>] (fuse_simple_request fs/fuse/fuse_i.h:1262 [inline])
[<807826b8>] (__fuse_simple_request) from [<8078bfd0>] (fuse_flush+0x178/0x1b4 fs/fuse/file.c:500)
 r8:86554d80 r7:853cfbc0 r6:867fb400 r5:83714b40 r4:85186f00
[<8078be58>] (fuse_flush) from [<805804c4>] (filp_flush+0x38/0x88 fs/open.c:1467)
 r8:867fb440 r7:85e95500 r6:0000001e r5:867fb400 r4:85186f00
[<8058048c>] (filp_flush) from [<80580528>] (filp_close+0x14/0x28 fs/open.c:1480)
 r7:85e95500 r6:0000001e r5:85186f00 r4:867fb400
[<80580514>] (filp_close) from [<805b2818>] (__range_close fs/file.c:794 [inline])
[<80580514>] (filp_close) from [<805b2818>] (__do_sys_close_range fs/file.c:855 [inline])
[<80580514>] (filp_close) from [<805b2818>] (sys_close_range+0x18c/0x224 fs/file.c:819)
 r5:00000005 r4:867fb400
[<805b268c>] (sys_close_range) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xe83ddfa8 to 0xe83ddff0)
dfa0:                   00000000 00000000 00000003 0000001e 00000000 7eb00918
dfc0: 00000000 00000000 00000000 000001b4 00901678 ffffffff 00000000 003462e4
dfe0: 7eb00840 7eb00830 0002853c 00130810
 r10:000001b4 r9:8400d780 r8:8020029c r7:000001b4 r6:00000000 r5:00000000
 r4:00000000
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 29 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
Call trace: 
[<80201a14>] (dump_backtrace) from [<80201b08>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:60000193 r6:60000193 r5:8231e54c r4:00000000
[<80201af0>] (show_stack) from [<8021e384>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201af0>] (show_stack) from [<8021e384>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e328>] (dump_stack_lvl) from [<8021e3b0>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:00000000 r6:00000113 r5:00000000 r4:00000001
[<8021e398>] (dump_stack) from [<81b035b4>] (nmi_cpu_backtrace+0x150/0x170 lib/nmi_backtrace.c:113)
[<81b03464>] (nmi_cpu_backtrace) from [<81b03704>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62)
 r7:00000000 r6:82a0b550 r5:82a1a2b8 r4:ffffffff
[<81b035d4>] (nmi_trigger_cpumask_backtrace) from [<8022f104>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852)
 r9:82a0b6d8 r8:00000048 r7:0000000a r6:82a03d80 r5:00007ea0 r4:00000048
[<8022f0ec>] (arch_trigger_cpumask_backtrace) from [<81b0b250>] (trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline])
[<8022f0ec>] (arch_trigger_cpumask_backtrace) from [<81b0b250>] (__sys_info lib/sys_info.c:157 [inline])
[<8022f0ec>] (arch_trigger_cpumask_backtrace) from [<81b0b250>] (sys_info+0x68/0xa8 lib/sys_info.c:165)
[<81b0b1e8>] (sys_info) from [<8038abdc>] (check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline])
[<81b0b1e8>] (sys_info) from [<8038abdc>] (watchdog+0x3ac/0x858 kernel/hung_task.c:561)
 r5:00007ea0 r4:00000001
[<8038a830>] (watchdog) from [<80281550>] (kthread+0x11c/0x154 kernel/kthread.c:436)
 r10:00000000 r9:df819e58 r8:83113980 r7:00000000 r6:8038a830 r5:83178000
 r4:838884c0
[<80281434>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdf8d5fb0 to 0xdf8d5ff8)
5fa0:                                     00000000 00000000 00000000 00000000
5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80281434 r4:838884c0
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 32290 Comm: syz.8.59307 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
PC is at 0x19418
LR is at 0x19418
pc : [<00019418>]    lr : [<00019418>]    psr: 20000010
sp : 20000110  ip : 20000110  fp : 76f340dc
r10: 00000001  r9 : 00000000  r8 : 003462d8
r7 : 00000000  r6 : 00000000  r5 : 00000000  r4 : 00000000
r3 : 00000000  r2 : 000001fc  r1 : 00000004  r0 : ffffffff
Flags: nzCv  IRQs on  FIQs on  Mode USER_32  ISA ARM  Segment none
Control: 30c5387d  Table: 89f70040  DAC: 00000000
Call trace: invalid frame pointer 0x76f340dc