INFO: task kworker/0:1H:42 blocked for more than 430 seconds.
      Not tainted 6.11.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1H    state:D stack:0     pid:42    tgid:42    ppid:2      flags:0x00000000
Workqueue: xillyusb wakeup_all
Call trace: 
[<819769cc>] (__schedule) from [<81977564>] (__schedule_loop kernel/sched/core.c:6606 [inline])
[<819769cc>] (__schedule) from [<81977564>] (schedule+0x2c/0xfc kernel/sched/core.c:6621)
 r10:df909e1c r9:00000002 r8:df909dc4 r7:82fd6000 r6:df909e14 r5:00000000
 r4:82fd6000
[<81977538>] (schedule) from [<8197eaf0>] (schedule_timeout+0xe4/0x114 kernel/time/timer.c:2557)
 r5:00000000 r4:7fffffff
[<8197ea0c>] (schedule_timeout) from [<819782cc>] (do_wait_for_common kernel/sched/completion.c:95 [inline])
[<8197ea0c>] (schedule_timeout) from [<819782cc>] (__wait_for_common kernel/sched/completion.c:116 [inline])
[<8197ea0c>] (schedule_timeout) from [<819782cc>] (wait_for_common kernel/sched/completion.c:127 [inline])
[<8197ea0c>] (schedule_timeout) from [<819782cc>] (wait_for_completion+0x6c/0x144 kernel/sched/completion.c:148)
 r7:82fd6000 r6:df909e14 r5:df909e18 r4:7fffffff
[<81978260>] (wait_for_completion) from [<80263bf0>] (__flush_workqueue+0x118/0x5d0 kernel/workqueue.c:3969)
 r10:852d40d8 r9:85071810 r8:8507183c r7:85071810 r6:85071800 r5:df909e08
 r4:00000001
[<80263ad8>] (__flush_workqueue) from [<80264130>] (drain_workqueue+0x88/0x124 kernel/workqueue.c:4082)
 r10:852d40d8 r9:c28f5c29 r8:028f5c28 r7:85071810 r6:85071800 r5:00000000
 r4:852d408c
[<802640a8>] (drain_workqueue) from [<802694b4>] (destroy_workqueue+0x54/0x2a4 kernel/workqueue.c:5781)
 r9:82fd6000 r8:00c00000 r7:85071810 r6:84798400 r5:85071800 r4:852d408c
[<80269460>] (destroy_workqueue) from [<809cb8f0>] (cleanup_dev+0x44/0x60 drivers/char/xillybus/xillyusb.c:558)
 r9:82fd6000 r8:00c00000 r7:dddd01a0 r6:84798400 r5:852d4080 r4:852d408c
[<809cb8ac>] (cleanup_dev) from [<809cba2c>] (kref_put include/linux/kref.h:65 [inline])
[<809cb8ac>] (cleanup_dev) from [<809cba2c>] (wakeup_all+0x120/0x124 drivers/char/xillybus/xillyusb.c:612)
 r5:852d409c r4:82ed0c00
[<809cb90c>] (wakeup_all) from [<80265f30>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3231)
 r10:84798405 r9:82fd6000 r8:00c00000 r7:dddd01a0 r6:84798400 r5:852d409c
 r4:82ed0c00 r3:809cb90c
[<80265d7c>] (process_one_work) from [<80266b14>] (process_scheduled_works kernel/workqueue.c:3312 [inline])
[<80265d7c>] (process_one_work) from [<80266b14>] (worker_thread+0x1ec/0x3f4 kernel/workqueue.c:3390)
 r10:82fd6000 r9:82ed0c2c r8:61c88647 r7:dddd01c0 r6:82604d40 r5:dddd01a0
 r4:82ed0c00
[<80266928>] (worker_thread) from [<8026fb6c>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:df841e78 r8:82eda340 r7:82ed0c00 r6:80266928 r5:82fd6000
 r4:82eda240
[<8026fa68>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdf909fb0 to 0xdf909ff8)
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 r5:8026fa68 r4:82eda240
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
Call trace: 
[<81954e80>] (dump_backtrace) from [<81954f7c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:00000013 r5:60000093 r4:8200be24
[<81954f64>] (show_stack) from [<81972c6c>] (__dump_stack lib/dump_stack.c:93 [inline])
[<81954f64>] (show_stack) from [<81972c6c>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:119)
[<81972bfc>] (dump_stack_lvl) from [<81972c90>] (dump_stack+0x18/0x1c lib/dump_stack.c:128)
 r5:00000000 r4:00000001
[<81972c78>] (dump_stack) from [<81942170>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113)
[<81942010>] (nmi_cpu_backtrace) from [<819422bc>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62)
 r7:00000000 r6:8260c5d0 r5:8261a88c r4:ffffffff
[<8194218c>] (nmi_trigger_cpumask_backtrace) from [<802103c8>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851)
 r9:0000f7c0 r8:828b10f0 r7:8260c734 r6:00007f51 r5:8261ae48 r4:82fa421c
[<802103b0>] (arch_trigger_cpumask_backtrace) from [<80350e24>] (trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline])
[<802103b0>] (arch_trigger_cpumask_backtrace) from [<80350e24>] (check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline])
[<802103b0>] (arch_trigger_cpumask_backtrace) from [<80350e24>] (watchdog+0x498/0x5b8 kernel/hung_task.c:379)
[<8035098c>] (watchdog) from [<8026fb6c>] (kthread+0x104/0x134 kernel/kthread.c:389)
 r10:00000000 r9:df819e58 r8:82f16280 r7:00000000 r6:8035098c r5:82f19800
 r4:82ecef40
[<8026fa68>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdf8e1fb0 to 0xdf8e1ff8)
1fa0:                                     00000000 00000000 00000000 00000000
1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026fa68 r4:82ecef40
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2926 Comm: klogd Not tainted 6.11.0-rc3-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at 0x7efcd4bc
LR is at 0x76df4cc4
pc : [<7efcd4bc>]    lr : [<76df4cc4>]    psr: 20000010
sp : 7ecc4bb0  ip : 00000000  fp : 76f7a21a
r10: 76ea0e60  r9 : 00000006  r8 : 00000000
r7 : 7ecc4ca4  r6 : 76fd65a0  r5 : 7ecc4c14  r4 : 7ecc4c04
r3 : 76fdbd00  r2 : 7efcd4bc  r1 : 7ecc4bc8  r0 : 00000005
Flags: nzCv  IRQs on  FIQs on  Mode USER_32  ISA ARM  Segment none
Control: 30c5387d  Table: 8439a080  DAC: 00000000
Call trace: invalid frame pointer 0x76f7a21a