INFO: task syz-executor.0:3510 blocked for more than 430 seconds.
      Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:    0 pid: 3510 ppid:  2234 flags:0x00000001
Backtrace: 
[<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326)
 r10:837e07d8 r9:85150400 r8:847c1180 r7:83852900 r6:83852900 r5:83744448
 r4:835ddc00
[<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178)
 r5:83744448 r4:837448b0
[<8071ab88>] (blk_mq_freeze_queue_wait) from [<8071db68>] (blk_freeze_queue block/blk-mq.c:205 [inline])
[<8071ab88>] (blk_mq_freeze_queue_wait) from [<8071db68>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214)
 r5:85150400 r4:83744440
[<8071db4c>] (blk_mq_freeze_queue) from [<80a00d6c>] (nbd_add_socket+0x70/0x208 drivers/block/nbd.c:1109)
 r5:85150400 r4:00000000
[<80a00cfc>] (nbd_add_socket) from [<80a011b0>] (__nbd_ioctl drivers/block/nbd.c:1454 [inline])
[<80a00cfc>] (nbd_add_socket) from [<80a011b0>] (nbd_ioctl+0x2ac/0x38c drivers/block/nbd.c:1511)
 r9:85150400 r8:83852980 r7:82c83740 r6:83852900 r5:00000005 r4:0000ab00
[<80a00f04>] (nbd_ioctl) from [<807268dc>] (blkdev_ioctl+0x364/0xc58 block/ioctl.c:609)
 r10:837e07d8 r9:00000004 r8:480a001d r7:00000005 r6:82c83740 r5:0000ab00
 r4:80a00f04
[<80726578>] (blkdev_ioctl) from [<804990a8>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80726578>] (blkdev_ioctl) from [<804990a8>] (do_vfs_ioctl fs/ioctl.c:834 [inline])
[<80726578>] (blkdev_ioctl) from [<804990a8>] (__do_sys_ioctl fs/ioctl.c:872 [inline])
[<80726578>] (blkdev_ioctl) from [<804990a8>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860)
 r10:837e07d8 r9:00000004 r8:84b87480 r7:00000005 r6:84b87481 r5:00000000
 r4:0000ab00
[<80498f98>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64)
Exception stack(0x8400dfa8 to 0x8400dff0)
dfa0:                   00000000 00000000 00000004 0000ab00 00000005 00000000
dfc0: 00000000 00000000 00000000 00000036 7e8ef31a 76f4c6d0 7e8ef4a4 76f4c20c
dfe0: 76f4c048 76f4c038 00018e9c 0004ba40
 r10:00000036 r9:835ddc00 r8:80200244 r7:00000036 r6:00000000 r5:00000000
 r4:00000000
INFO: task syz-executor.0:3514 blocked for more than 430 seconds.
      Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:    0 pid: 3514 ppid:  2234 flags:0x00000001
Backtrace: 
[<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326)
 r10:837e07d8 r9:85150400 r8:83852984 r7:85329dec r6:00000002 r5:829c6780
 r4:829c6780
[<81712e04>] (schedule) from [<81713474>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6385)
 r5:829c6780 r4:83852980
[<8171345c>] (schedule_preempt_disabled) from [<817147ac>] (__mutex_lock_common kernel/locking/mutex.c:680 [inline])
[<8171345c>] (schedule_preempt_disabled) from [<817147ac>] (__mutex_lock.constprop.0+0x170/0x54c kernel/locking/mutex.c:740)
[<8171463c>] (__mutex_lock.constprop.0) from [<81714c5c>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1028)
 r9:85150400 r8:83852980 r7:82c83740 r6:83852900 r5:00000005 r4:0000ab00
[<81714c48>] (__mutex_lock_slowpath) from [<81714c9c>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:283)
[<81714c60>] (mutex_lock) from [<80a00f64>] (nbd_ioctl+0x60/0x38c drivers/block/nbd.c:1504)
[<80a00f04>] (nbd_ioctl) from [<807268dc>] (blkdev_ioctl+0x364/0xc58 block/ioctl.c:609)
 r10:837e07d8 r9:00000004 r8:480a001d r7:00000005 r6:82c83740 r5:0000ab00
 r4:80a00f04
[<80726578>] (blkdev_ioctl) from [<804990a8>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80726578>] (blkdev_ioctl) from [<804990a8>] (do_vfs_ioctl fs/ioctl.c:834 [inline])
[<80726578>] (blkdev_ioctl) from [<804990a8>] (__do_sys_ioctl fs/ioctl.c:872 [inline])
[<80726578>] (blkdev_ioctl) from [<804990a8>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860)
 r10:837e07d8 r9:00000004 r8:836466c0 r7:00000005 r6:836466c1 r5:00000000
 r4:0000ab00
[<80498f98>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64)
Exception stack(0x85329fa8 to 0x85329ff0)
9fa0:                   00000000 00000000 00000004 0000ab00 00000005 00000000
9fc0: 00000000 00000000 ffffffff 00000036 7e8ef31a 76f0a6d0 7e8ef4a4 76f0a20c
9fe0: 76f0a048 76f0a038 00018e9c 0004ba40
 r10:00000036 r9:829c6780 r8:80200244 r7:00000036 r6:ffffffff r5:00000000
 r4:00000000
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816f56d0>] (dump_backtrace) from [<816f58bc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237)
 r7:00000001 r6:00000000 r5:600f0093 r4:81d6017c
[<816f58a4>] (show_stack) from [<816fe314>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816f58a4>] (show_stack) from [<816fe314>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816fe2cc>] (dump_stack_lvl) from [<816fe338>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:000f0013 r4:00000001
[<816fe320>] (dump_stack) from [<8083cd6c>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:105)
[<8083cc58>] (nmi_cpu_backtrace) from [<8083ceec>] (nmi_trigger_cpumask_backtrace+0x114/0x1d0 lib/nmi_backtrace.c:62)
 r7:00000001 r6:8220c494 r5:8220cc70 r4:00000000
[<8083cdd8>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865)
 r9:000c5040 r8:82204d00 r7:00007f65 r6:824839b0 r5:8220c5d4 r4:83cd8240
[<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline])
[<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline])
[<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295)
[<80329adc>] (watchdog) from [<8026a518>] (kthread+0x164/0x198 kernel/kthread.c:327)
 r10:8294de4c r9:00000000 r8:00000000 r7:80329adc r6:828cf180 r5:82a89240
 r4:828f2e00
[<8026a3b4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:146)
Exception stack(0x82a25fb0 to 0x82a25ff8)
5fa0:                                     00000000 00000000 00000000 00000000
5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026a3b4
 r4:82a89240
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2020 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at 0x76e9d300
LR is at 0x76ea0220
pc : [<76e9d300>]    lr : [<76ea0220>]    psr: 600f0010
sp : 7ee1cbd8  ip : 76f76030  fp : 00000000
r10: 76f76764  r9 : 00000000  r8 : 00002000
r7 : 76fce080  r6 : 000185d0  r5 : 01fbfa30  r4 : 00000000
r3 : 00000000  r2 : 01fb7008  r1 : 00002000  r0 : 76f76764
Flags: nZCv  IRQs on  FIQs on  Mode USER_32  ISA ARM  Segment user
Control: 30c5387d  Table: 83e4a8c0  DAC: fffffffd
CPU: 0 PID: 2020 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816f56d0>] (dump_backtrace) from [<816f58bc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237)
 r7:00000017 r6:840c7fb0 r5:600f0193 r4:81d6017c
[<816f58a4>] (show_stack) from [<816fe314>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816f58a4>] (show_stack) from [<816fe314>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816fe2cc>] (dump_stack_lvl) from [<816fe338>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:000f0193 r4:00000000
[<816fe320>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199)
[<8020906c>] (show_regs) from [<8083cd54>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:103)
[<8083cc58>] (nmi_cpu_backtrace) from [<8020fd58>] (do_handle_IPI+0x4c/0x3b4 arch/arm/kernel/smp.c:680)
 r7:00000017 r6:00000000 r5:8280cb80 r4:00000007
[<8020fd0c>] (do_handle_IPI) from [<802100e0>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708)
 r9:00000000 r8:840c7f18 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00
[<802100c0>] (ipi_handler) from [<802b9530>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933)
[<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline])
[<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline])
[<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680)
 r10:76f76764 r9:00000000 r8:00000000 r7:df80200c r6:83f82e00 r5:00000007
 r4:82888000 r3:802b9494
[<802b2b58>] (generic_handle_domain_irq) from [<8084fa80>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372)
 r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c
[<8084fa18>] (gic_handle_irq) from [<81710264>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243)
 r7:840c7fb0 r6:81f092c0 r5:81f092d8 r4:820a5fb8
[<81710204>] (generic_handle_arch_irq) from [<80200dbc>] (__irq_usr+0x5c/0x80 arch/arm/kernel/entry-armv.S:429)
Exception stack(0x840c7fb0 to 0x840c7ff8)
7fa0:                                     76f76764 00002000 01fb7008 00000000
7fc0: 00000000 01fbfa30 000185d0 76fce080 00002000 00000000 76f76764 00000000
7fe0: 76f76030 7ee1cbd8 76ea0220 76e9d300 600f0010 ffffffff
 r9:00000000 r8:5bd2d000 r7:83f82e00 r6:ffffffff r5:600f0010 r4:76e9d300