INFO: task syz-executor.0:30500 blocked for more than 430 seconds.
      Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:    0 pid:30500 ppid:  2232 flags:0x00000001
Backtrace: 
[<816f4018>] (__schedule) from [<816f49dc>] (schedule+0x4c/0xcc kernel/sched/core.c:6323)
 r10:836dc9f0 r9:82c8f740 r8:8220c920 r7:8220c5b8 r6:8220c490 r5:836dc9f8
 r4:8347f300
[<816f4990>] (schedule) from [<8070cae0>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178)
 r5:836dc9f8 r4:836dce60
[<8070ca74>] (blk_mq_freeze_queue_wait) from [<80719d98>] (del_gendisk+0x17c/0x20c block/genhd.c:623)
 r5:8516af00 r4:00000008
[<80719c1c>] (del_gendisk) from [<809ecaa4>] (loop_remove+0x20/0x58 drivers/block/loop.c:2080)
 r10:8380bcd0 r9:0000000b r8:844803c0 r7:00000000 r6:8297972c r5:8234b570
 r4:82979600 r3:8347f300
[<809eca84>] (loop_remove) from [<809ed108>] (loop_control_remove drivers/block/loop.c:2137 [inline])
[<809eca84>] (loop_remove) from [<809ed108>] (loop_control_ioctl+0x1d8/0x1fc drivers/block/loop.c:2175)
 r5:82979600 r4:00000000
[<809ecf30>] (loop_control_ioctl) from [<8048e240>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<809ecf30>] (loop_control_ioctl) from [<8048e240>] (do_vfs_ioctl fs/ioctl.c:834 [inline])
[<809ecf30>] (loop_control_ioctl) from [<8048e240>] (__do_sys_ioctl fs/ioctl.c:872 [inline])
[<809ecf30>] (loop_control_ioctl) from [<8048e240>] (sys_ioctl+0x110/0xab0 fs/ioctl.c:860)
 r6:844803c1 r5:00000000 r4:00004c81
[<8048e130>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64)
Exception stack(0x82965fa8 to 0x82965ff0)
5fa0:                   00000000 00000000 0000000b 00004c81 00000000 00000000
5fc0: 00000000 00000000 00000000 00000036 7efa731a 76f1d6d0 7efa74a4 76f1d20c
5fe0: 76f1d048 76f1d038 00018e9c 0004ba40
 r10:00000036 r9:8347f300 r8:80200244 r7:00000036 r6:00000000 r5:00000000
 r4:00000000
NMI backtrace for cpu 0
CPU: 0 PID: 25 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816d743c>] (dump_backtrace) from [<816d7628>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237)
 r7:8020f468 r6:00000000 r5:60000093 r4:81d5fa2c
[<816d7610>] (show_stack) from [<816e019c>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816d7610>] (show_stack) from [<816e019c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816e0154>] (dump_stack_lvl) from [<816e01c0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000000 r4:00000013
[<816e01a8>] (dump_stack) from [<8082de4c>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:105)
[<8082dd38>] (nmi_cpu_backtrace) from [<8082dfc0>] (nmi_trigger_cpumask_backtrace+0x108/0x1a8 lib/nmi_backtrace.c:62)
 r7:8020f468 r6:8220c494 r5:8220cc70 r4:00000000
[<8082deb8>] (nmi_trigger_cpumask_backtrace) from [<80210754>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865)
 r9:000f2800 r8:82204d00 r7:8220c5d4 r6:8221af58 r5:00007f68 r4:83503c68
[<8021073c>] (arch_trigger_cpumask_backtrace) from [<803249b0>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline])
[<8021073c>] (arch_trigger_cpumask_backtrace) from [<803249b0>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline])
[<8021073c>] (arch_trigger_cpumask_backtrace) from [<803249b0>] (watchdog+0x464/0x554 kernel/hung_task.c:295)
[<8032454c>] (watchdog) from [<8026972c>] (kthread+0x150/0x16c kernel/kthread.c:327)
 r10:8294de4c r9:00000000 r8:00000000 r7:8032454c r6:828cf180 r5:828f2280
 r4:82a891c0
[<802695dc>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:146)
Exception stack(0x82a23fb0 to 0x82a23ff8)
3fa0:                                     00000000 00000000 00000000 00000000
3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
3fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802695dc
 r4:82a891c0
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.15.0-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at arch_cpu_idle+0x4c/0x50 arch/arm/kernel/process.c:77
LR is at arch_cpu_idle+0x48/0x50 arch/arm/kernel/process.c:75
pc : [<80208abc>]    lr : [<80208ab8>]    psr: 60000013
sp : 82967f58  ip : 82967f68  fp : 82967f64
r10: 00000000  r9 : 00000000  r8 : 00000002
r7 : 8220c4d4  r6 : 00000001  r5 : 8220c494  r4 : 828e9700
r3 : 8021bfe0  r2 : 00000001  r1 : 00000000  r0 : 00c31dae
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 8435a5c0  DAC: 00000000
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.15.0-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816d743c>] (dump_backtrace) from [<816d7628>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237)
 r7:00000001 r6:82967f08 r5:60000193 r4:81d5fa2c
[<816d7610>] (show_stack) from [<816e019c>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816d7610>] (show_stack) from [<816e019c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816e0154>] (dump_stack_lvl) from [<816e01c0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000001 r4:00000193
[<816e01a8>] (dump_stack) from [<80208d60>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199)
[<80208d4c>] (show_regs) from [<8082de34>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:103)
[<8082dd38>] (nmi_cpu_backtrace) from [<8020f8f8>] (do_handle_IPI+0x40/0x34c arch/arm/kernel/smp.c:680)
 r7:00000001 r6:828e9700 r5:8280cb80 r4:00000007
[<8020f8b8>] (do_handle_IPI) from [<8020fc24>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708)
 r9:828e9700 r8:00000002 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00
[<8020fc04>] (ipi_handler) from [<802b6d28>] (handle_percpu_devid_irq+0x84/0x25c kernel/irq/chip.c:933)
[<802b6ca4>] (handle_percpu_devid_irq) from [<802b0524>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline])
[<802b6ca4>] (handle_percpu_devid_irq) from [<802b0524>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline])
[<802b6ca4>] (handle_percpu_devid_irq) from [<802b0524>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680)
 r10:00000000 r9:828e9700 r8:00000002 r7:df80200c r6:828e9700 r5:00000007
 r4:82888000 r3:802b6ca4
[<802b04dc>] (generic_handle_domain_irq) from [<80840b34>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372)
 r7:df80200c r6:820b2e44 r5:df802000 r4:8220cc8c
[<80840acc>] (gic_handle_irq) from [<816f2138>] (generic_handle_arch_irq+0x3c/0x4c kernel/irq/handle.c:243)
 r7:82967f3c r6:00000000 r5:82967f08 r4:820b2e38
[<816f20fc>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x4c arch/arm/kernel/entry-armv.S:202)
Exception stack(0x82967f08 to 0x82967f50)
7f00:                   00c31dae 00000000 00000001 8021bfe0 828e9700 8220c494
7f20: 00000001 8220c4d4 00000002 00000000 00000000 82967f64 82967f68 82967f58
7f40: 80208ab8 80208abc 60000013 ffffffff
 r7:82967f3c r6:ffffffff r5:60000013 r4:80208abc
[<80208a70>] (arch_cpu_idle) from [<816fa3d4>] (default_idle_call+0x30/0x12c kernel/sched/idle.c:112)
[<816fa3a4>] (default_idle_call) from [<8027fc8c>] (cpuidle_idle_call kernel/sched/idle.c:194 [inline])
[<816fa3a4>] (default_idle_call) from [<8027fc8c>] (do_idle+0x234/0x2b8 kernel/sched/idle.c:306)
 r5:8220c494 r4:828e9700
[<8027fa58>] (do_idle) from [<8027ffdc>] (cpu_startup_entry+0x20/0x24 kernel/sched/idle.c:403)
 r10:00000000 r9:412fc0f1 r8:80003010 r7:8243c464 r6:828e9700 r5:00000001
 r4:00000097
[<8027ffbc>] (cpu_startup_entry) from [<8021025c>] (secondary_start_kernel+0x1bc/0x28c arch/arm/kernel/smp.c:478)
[<802100a0>] (secondary_start_kernel) from [<80201534>] (__enable_mmu+0x0/0xc arch/arm/kernel/head.S:431)
 r7:8243c464 r6:30c0387d r5:00000000 r4:8289bec0