INFO: task syz.1.2217:11408 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.1.2217      state:D stack:0     pid:11408 tgid:11408 ppid:8245   task_flags:0x400040 flags:0x00000005
Call trace: 
[<81aea14c>] (__schedule) from [<81aeb560>] (__schedule_loop kernel/sched/core.c:6993 [inline])
[<81aea14c>] (__schedule) from [<81aeb560>] (schedule+0x2c/0x134 kernel/sched/core.c:7008)
 r10:85860540 r9:84f4e200 r8:85919e00 r7:85461598 r6:eb115ea8 r5:eb115e50
 r4:84f4e200
[<81aeb534>] (schedule) from [<807692c0>] (request_wait_answer fs/fuse/dev.c:585 [inline])
[<81aeb534>] (schedule) from [<807692c0>] (__fuse_request_send fs/fuse/dev.c:599 [inline])
[<81aeb534>] (schedule) from [<807692c0>] (__fuse_simple_request+0x398/0x4f4 fs/fuse/dev.c:693)
 r5:eb115e50 r4:85461540
[<80768f28>] (__fuse_simple_request) from [<807749a0>] (fuse_simple_request fs/fuse/fuse_i.h:1263 [inline])
[<80768f28>] (__fuse_simple_request) from [<807749a0>] (fuse_flush+0x178/0x1b4 fs/fuse/file.c:494)
 r8:85e13e80 r7:858a4d40 r6:838e5a00 r5:8501ef00 r4:85860540
[<80774828>] (fuse_flush) from [<8057008c>] (filp_flush+0x38/0x88 fs/open.c:1469)
 r8:838e5a40 r7:855d8e00 r6:0000001e r5:838e5a00 r4:85860540
[<80570054>] (filp_flush) from [<805700f0>] (filp_close+0x14/0x28 fs/open.c:1482)
 r7:855d8e00 r6:0000001e r5:85860540 r4:838e5a00
[<805700dc>] (filp_close) from [<805a1970>] (__range_close fs/file.c:794 [inline])
[<805700dc>] (filp_close) from [<805a1970>] (__do_sys_close_range fs/file.c:855 [inline])
[<805700dc>] (filp_close) from [<805a1970>] (sys_close_range+0x18c/0x224 fs/file.c:819)
 r5:00000004 r4:838e5a00
[<805a17e4>] (sys_close_range) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xeb115fa8 to 0xeb115ff0)
5fa0:                   00000000 00000000 00000003 0000001e 00000000 7e807918
5fc0: 00000000 00000000 00000000 000001b4 000cff49 ffffffff 00000000 003462e4
5fe0: 7e807840 7e807830 00028034 00130300
 r10:000001b4 r9:84f4e200 r8:8020029c r7:000001b4 r6:00000000 r5:00000000
 r4:00000000
INFO: task syz.1.2217:11411 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.1.2217      state:D stack:0     pid:11411 tgid:11408 ppid:8245   task_flags:0x400140 flags:0x00000001
Call trace: 
[<81aea14c>] (__schedule) from [<81aeb560>] (__schedule_loop kernel/sched/core.c:6993 [inline])
[<81aea14c>] (__schedule) from [<81aeb560>] (schedule+0x2c/0x134 kernel/sched/core.c:7008)
 r10:00000001 r9:00000000 r8:85919e00 r7:85461528 r6:eb119e60 r5:eb119db8
 r4:84f3e200
[<81aeb534>] (schedule) from [<807692c0>] (request_wait_answer fs/fuse/dev.c:585 [inline])
[<81aeb534>] (schedule) from [<807692c0>] (__fuse_request_send fs/fuse/dev.c:599 [inline])
[<81aeb534>] (schedule) from [<807692c0>] (__fuse_simple_request+0x398/0x4f4 fs/fuse/dev.c:693)
 r5:eb119db8 r4:854614d0
[<80768f28>] (__fuse_simple_request) from [<8077e32c>] (fuse_simple_request fs/fuse/fuse_i.h:1263 [inline])
[<80768f28>] (__fuse_simple_request) from [<8077e32c>] (fuse_send_ioctl fs/fuse/ioctl.c:23 [inline])
[<80768f28>] (__fuse_simple_request) from [<8077e32c>] (fuse_do_ioctl+0x3c0/0x8ec fs/fuse/ioctl.c:341)
 r8:00001000 r7:85e13e80 r6:858a4d40 r5:00000000 r4:00000000
[<8077df6c>] (fuse_do_ioctl) from [<8077e914>] (fuse_ioctl_common fs/fuse/ioctl.c:424 [inline])
[<8077df6c>] (fuse_do_ioctl) from [<8077e914>] (fuse_file_ioctl+0x50/0x64 fs/fuse/ioctl.c:429)
 r10:84f3e200 r9:00000004 r8:85860540 r7:8501ef00 r6:20000000 r5:00005407
 r4:85860540
[<8077e8c4>] (fuse_file_ioctl) from [<805911d0>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<8077e8c4>] (fuse_file_ioctl) from [<805911d0>] (do_vfs_ioctl fs/ioctl.c:551 [inline])
[<8077e8c4>] (fuse_file_ioctl) from [<805911d0>] (__do_sys_ioctl fs/ioctl.c:595 [inline])
[<8077e8c4>] (fuse_file_ioctl) from [<805911d0>] (sys_ioctl+0x244/0xb5c fs/ioctl.c:583)
 r7:20000000 r6:00005407 r5:85860541 r4:00000000
[<80590f8c>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xeb119fa8 to 0xeb119ff0)
9fa0:                   00000000 00000000 00000004 00005407 20000000 00000000
9fc0: 00000000 00000000 00346310 00000036 003462d8 00000000 00000001 76f0a0dc
9fe0: 76f09e88 76f09e78 00018bc4 00130300
 r10:00000036 r9:84f3e200 r8:8020029c r7:00000036 r6:00346310 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 r5:822a8688 r4:00000000
[<80201af0>] (show_stack) from [<8021e410>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201af0>] (show_stack) from [<8021e410>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e3b4>] (dump_stack_lvl) from [<8021e43c>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:00000000 r6:00000113 r5:00000000 r4:00000001
[<8021e424>] (dump_stack) from [<81ad3b7c>] (nmi_cpu_backtrace+0x150/0x170 lib/nmi_backtrace.c:113)
[<81ad3a2c>] (nmi_cpu_backtrace) from [<81ad3ccc>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62)
 r7:00000000 r6:8280c550 r5:8281afb8 r4:ffffffff
[<81ad3b9c>] (nmi_trigger_cpumask_backtrace) from [<8022f124>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852)
 r9:82ac7834 r8:8280c6d8 r7:00018540 r6:84f3e9e8 r5:82804d80 r4:00000048
[<8022f10c>] (arch_trigger_cpumask_backtrace) from [<81adb7bc>] (trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline])
[<8022f10c>] (arch_trigger_cpumask_backtrace) from [<81adb7bc>] (__sys_info lib/sys_info.c:157 [inline])
[<8022f10c>] (arch_trigger_cpumask_backtrace) from [<81adb7bc>] (sys_info+0x68/0xa8 lib/sys_info.c:165)
[<81adb754>] (sys_info) from [<80385270>] (check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline])
[<81adb754>] (sys_info) from [<80385270>] (watchdog+0x59c/0x8d8 kernel/hung_task.c:515)
 r5:82804d80 r4:83ee6914
[<80384cd4>] (watchdog) from [<802814a4>] (kthread+0x11c/0x154 kernel/kthread.c:436)
 r10:00000000 r9:df819e60 r8:83103500 r7:00000000 r6:80384cd4 r5:831f8000
 r4:8333dc00
[<80281388>] (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 r5:80281388 r4:8333dc00
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2804 Comm: pr/ttyAMA-1 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
PC is at __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
PC is at _raw_spin_unlock_irqrestore+0x28/0x54 kernel/locking/spinlock.c:194
LR is at spin_unlock_irqrestore include/linux/spinlock.h:407 [inline]
LR is at __uart_port_unlock_irqrestore include/linux/serial_core.h:616 [inline]
LR is at pl011_console_device_unlock+0x20/0x24 drivers/tty/serial/amba-pl011.c:2603
pc : [<81af4640>]    lr : [<80acceac>]    psr: 60000013
sp : eb479ec8  ip : eb479ed8  fp : eb479ed4
r10: 8295bbb4  r9 : 00000001  r8 : 00000000
r7 : 00000117  r6 : 8295bb18  r5 : 00000000  r4 : 00000001
r3 : 00002770  r2 : 00000000  r1 : 60000013  r0 : 8472cc40
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 857ff480  DAC: 00000000
Call trace: 
[<81af4618>] (_raw_spin_unlock_irqrestore) from [<80acceac>] (spin_unlock_irqrestore include/linux/spinlock.h:407 [inline])
[<81af4618>] (_raw_spin_unlock_irqrestore) from [<80acceac>] (__uart_port_unlock_irqrestore include/linux/serial_core.h:616 [inline])
[<81af4618>] (_raw_spin_unlock_irqrestore) from [<80acceac>] (pl011_console_device_unlock+0x20/0x24 drivers/tty/serial/amba-pl011.c:2603)
[<80acce8c>] (pl011_console_device_unlock) from [<802e6920>] (nbcon_emit_one+0x88/0x100 kernel/printk/nbcon.c:1165)
[<802e6898>] (nbcon_emit_one) from [<802e6ba0>] (nbcon_kthread_func+0x208/0x2ec kernel/printk/nbcon.c:1271)
 r6:82ac410c r5:8295bb18 r4:84f56e40
[<802e6998>] (nbcon_kthread_func) from [<802814a4>] (kthread+0x11c/0x154 kernel/kthread.c:436)
 r10:00000000 r9:df8f5b48 r8:84cdd500 r7:8295bb18 r6:802e6998 r5:84f56e40
 r4:84cfba40
[<80281388>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xeb479fb0 to 0xeb479ff8)
9fa0:                                     00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80281388 r4:84cfba40