INFO: task syz.3.53975:20993 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.3.53975     state:D stack:0     pid:20993 tgid:20993 ppid:24090  task_flags:0x400040 flags:0x00000005
Call trace: 
[<81b5909c>] (__schedule) from [<81b5a534>] (__schedule_loop kernel/sched/core.c:7311 [inline])
[<81b5909c>] (__schedule) from [<81b5a534>] (schedule+0x2c/0xec kernel/sched/core.c:7326)
 r10:83828b80 r9:83318000 r8:85f3a800 r7:84dd3448 r6:dfaa9ea0 r5:dfaa9e30
 r4:83318000
[<81b5a508>] (schedule) from [<8079f220>] (request_wait_answer fs/fuse/dev.c:743 [inline])
[<81b5a508>] (schedule) from [<8079f220>] (__fuse_request_send fs/fuse/dev.c:757 [inline])
[<81b5a508>] (schedule) from [<8079f220>] (fuse_chan_send+0x390/0x47c fs/fuse/dev.c:833)
 r5:dfaa9e30 r4:84dd33f0
[<8079ee90>] (fuse_chan_send) from [<807b1778>] (__fuse_simple_request+0x5c/0x68 fs/fuse/req.c:69)
 r8:84b8d980 r7:84a9cd00 r6:8643e700 r5:86cc6d80 r4:dfaa9ea0
[<807b171c>] (__fuse_simple_request) from [<807a6f14>] (fuse_simple_request fs/fuse/fuse_i.h:1012 [inline])
[<807b171c>] (__fuse_simple_request) from [<807a6f14>] (fuse_flush+0x178/0x1b4 fs/fuse/file.c:504)
 r5:858346c0 r4:83828b80
[<807a6d9c>] (fuse_flush) from [<80599470>] (filp_flush+0x38/0x88 fs/open.c:1471)
 r8:8643e740 r7:87481740 r6:0000001e r5:8643e700 r4:83828b80
[<80599438>] (filp_flush) from [<805994d4>] (filp_close+0x14/0x28 fs/open.c:1484)
 r7:87481740 r6:0000001e r5:83828b80 r4:8643e700
[<805994c0>] (filp_close) from [<805cba7c>] (__range_close fs/file.c:793 [inline])
[<805994c0>] (filp_close) from [<805cba7c>] (__do_sys_close_range fs/file.c:854 [inline])
[<805994c0>] (filp_close) from [<805cba7c>] (sys_close_range+0x18c/0x224 fs/file.c:818)
 r5:00000004 r4:8643e700
[<805cb8f0>] (sys_close_range) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdfaa9fa8 to 0xdfaa9ff0)
9fa0:                   00000000 00000000 00000003 0000001e 00000000 7e89c918
9fc0: 00000000 00000000 00000000 000001b4 0093e8a3 ffffffff 00000000 003562e4
9fe0: 7e89c840 7e89c830 0002853c 00130820
 r10:000001b4 r9:83318000 r8:8020029c r7:000001b4 r6:00000000 r5:00000000
 r4:00000000
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 29 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
Call trace: 
[<80201998>] (dump_backtrace) from [<80201a8c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:600f0093 r6:600f0093 r5:82332444 r4:00000000
[<80201a74>] (show_stack) from [<8021e580>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201a74>] (show_stack) from [<8021e580>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e524>] (dump_stack_lvl) from [<8021e5ac>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:00000000 r6:000f0013 r5:00000001 r4:00000001
[<8021e594>] (dump_stack) from [<81b4273c>] (nmi_cpu_backtrace+0x150/0x170 lib/nmi_backtrace.c:122)
[<81b425ec>] (nmi_cpu_backtrace) from [<81b42890>] (nmi_trigger_cpumask_backtrace+0x134/0x208 lib/nmi_backtrace.c:65)
 r7:82a0b150 r6:83320c40 r5:82a1c7b8 r4:ffffffff
[<81b4275c>] (nmi_trigger_cpumask_backtrace) from [<8022f0f4>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851)
 r9:82a0b2f0 r8:00000001 r7:82a1ce80 r6:82ccae2c r5:00007f25 r4:00000048
[<8022f0dc>] (arch_trigger_cpumask_backtrace) from [<81b4a3cc>] (trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline])
[<8022f0dc>] (arch_trigger_cpumask_backtrace) from [<81b4a3cc>] (__sys_info lib/sys_info.c:157 [inline])
[<8022f0dc>] (arch_trigger_cpumask_backtrace) from [<81b4a3cc>] (sys_info+0x68/0xa8 lib/sys_info.c:165)
[<81b4a364>] (sys_info) from [<8038f854>] (check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline])
[<81b4a364>] (sys_info) from [<8038f854>] (watchdog+0x3a0/0x848 kernel/hung_task.c:561)
 r5:00007f25 r4:0000000a
[<8038f4b4>] (watchdog) from [<80281700>] (kthread+0x11c/0x154 kernel/kthread.c:436)
 r10:00000000 r9:df819e60 r8:831d5600 r7:00000000 r6:8038f4b4 r5:83320c40
 r4:833e1100
[<802815e4>] (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 r5:802815e4 r4:833e1100
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 2917 Comm: klogd Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
PC is at mmioset+0x0/0xac arch/arm/lib/memset.S:20
LR is at selinux_socket_sock_rcv_skb+0x68/0x290 security/selinux/hooks.c:5412
pc : [<81b24aa0>]    lr : [<80800e8c>]    psr: 60070013
sp : ebe0dd28  ip : 00000000  fp : ebe0dda4
r10: 856016c0  r9 : 8384cd80  r8 : 00000047
r7 : 00000001  r6 : 8384cd80  r5 : 856016c0  r4 : 00000000
r3 : 84dce640  r2 : 00000030  r1 : 00000000  r0 : ebe0dd4c
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 30c5387d  Table: 85754940  DAC: fffffffd
Call trace: 
[<80800e24>] (selinux_socket_sock_rcv_skb) from [<807df96c>] (security_sock_rcv_skb+0x54/0x1ac security/security.c:4420)
 r9:8384cd80 r8:8476d5c0 r7:00000001 r6:8476d5c0 r5:8384cd80 r4:856016c0
[<807df918>] (security_sock_rcv_skb) from [<8168d19c>] (sk_filter_trim_cap+0x44/0x3f4 net/core/filter.c:152)
 r5:856016c0 r4:8384cd80
[<8168d158>] (sk_filter_trim_cap) from [<8191a248>] (sk_filter include/linux/filter.h:1124 [inline])
[<8168d158>] (sk_filter_trim_cap) from [<8191a248>] (unix_dgram_sendmsg+0x1d4/0x734 net/unix/af_unix.c:2171)
 r10:856016c0 r9:8384cd80 r8:8476d5c0 r7:855d70c0 r6:0000006e r5:0000006e
 r4:ebe0dea0
[<8191a074>] (unix_dgram_sendmsg) from [<81620d00>] (sock_sendmsg_nosec net/socket.c:775 [inline])
[<8191a074>] (unix_dgram_sendmsg) from [<81620d00>] (__sock_sendmsg+0x44/0x78 net/socket.c:790)
 r10:00000121 r9:83827300 r8:834482c0 r7:00000000 r6:834482c0 r5:ebe0dea0
 r4:00000000
[<81620cbc>] (__sock_sendmsg) from [<81623c34>] (__sys_sendto+0x110/0x160 net/socket.c:2252)
 r7:00000000 r6:83827300 r5:00004000 r4:00000000
[<81623b24>] (__sys_sendto) from [<81623cc8>] (__do_sys_send net/socket.c:2269 [inline])
[<81623b24>] (__sys_sendto) from [<81623cc8>] (sys_send+0x20/0x28 net/socket.c:2266)
 r9:8476d5c0 r8:8020029c r7:00000121 r6:7ebb1858 r5:00000000 r4:00000000
[<81623ca8>] (sys_send) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xebe0dfa8 to 0xebe0dff0)
dfa0:                   00000000 00000000 00000003 7ebb1858 0000006e 00004000
dfc0: 00000000 00000000 7ebb1858 00000121 7ebb1858 00000053 0000006e 00000000
dfe0: 00000001 7ebb1770 00000000 76d60590