INFO: task syz-executor.0:2233 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: 2233 ppid: 1 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:838c8f2c r9:5ac3c35a r8:83104440 r7:8394c414 r6:00000001 r5:836b5b08 r4:842fc500 [<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:836b5b08 r4:836b5f70 [<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) r5:838c8e00 r4:836b5b00 [<8071db4c>] (blk_mq_freeze_queue) from [<809fcd3c>] (__loop_clr_fd+0x6c/0x428 drivers/block/loop.c:1122) r5:838c8e00 r4:838c8e00 [<809fccd0>] (__loop_clr_fd) from [<809fd19c>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:5ac3c35a r8:83104440 r7:8394c414 r6:00000001 r5:838c8f2c r4:838c8e00 [<809fd0f8>] (lo_release) from [<80706a4c>] (blkdev_put_whole block/bdev.c:694 [inline]) [<809fd0f8>] (lo_release) from [<80706a4c>] (blkdev_put+0xd4/0x27c block/bdev.c:956) r7:8394c414 r6:8394c3c0 r5:00000083 r4:83104440 [<80706978>] (blkdev_put) from [<80484bb0>] (kill_block_super+0x3c/0x74 fs/super.c:1400) r8:8220c490 r7:8220c920 r6:00000000 r5:00000083 r4:83104440 [<80484b74>] (kill_block_super) from [<80485824>] (deactivate_locked_super+0x54/0xb4 fs/super.c:335) r5:82317c48 r4:850b7c00 [<804857d0>] (deactivate_locked_super) from [<804858e4>] (deactivate_super fs/super.c:366 [inline]) [<804857d0>] (deactivate_locked_super) from [<804858e4>] (deactivate_super+0x60/0x64 fs/super.c:362) r5:84ec03c0 r4:850b7c00 [<80485884>] (deactivate_super) from [<804a9738>] (cleanup_mnt+0x11c/0x180 fs/namespace.c:1137) r5:84ec03c0 r4:00000002 [<804a961c>] (cleanup_mnt) from [<804a980c>] (__cleanup_mnt+0x14/0x18 fs/namespace.c:1144) r9:5ac3c35a r8:842fcd54 r7:8243d600 r6:842fc500 r5:842fcd24 r4:00000000 [<804a97f8>] (__cleanup_mnt) from [<80266e24>] (task_work_run+0x8c/0xb8 kernel/task_work.c:164) [<80266d98>] (task_work_run) from [<8020bff0>] (tracehook_notify_resume include/linux/tracehook.h:189 [inline]) [<80266d98>] (task_work_run) from [<8020bff0>] (do_work_pending+0x438/0x53c arch/arm/kernel/signal.c:630) r9:5ac3c35a r8:80200244 r7:fffffe30 r6:80200244 r5:836fffb0 r4:842fc500 [<8020bbb8>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x836fffb0 to 0x836ffff8) ffa0: 00000000 0000000a 00000000 00000000 ffc0: 00085150 7ee8f510 00120000 00000034 00085150 01beffc8 00000000 7ee8f4d0 ffe0: 7f0302ff 7ee8f494 00014734 0004ce3c 60000010 7ee8f510 r10:00000034 r9:842fc500 r8:80200244 r7:00000034 r6:00120000 r5:7ee8f510 r4:00085150 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 r5:60000093 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) r5:00000013 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) r9:0000cdc1 r8:82204d00 r7:00007f6b r6:824839b0 r5:8220c5d4 r4:83fcf940 [<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 r6:82af7740 r5:82af7700 r4:828f2e00 [<8026a3b4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:146) Exception stack(0x82a21fb0 to 0x82a21ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026a3b4 r4:82af7700 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2019 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x76e8170c LR is at 0x57234 pc : [<76e8170c>] lr : [<00057234>] psr: 600c0010 sp : 7e9fbcc4 ip : 000d6354 fp : 00000000 r10: 000d6c90 r9 : 000d6c90 r8 : 000d6880 r7 : 00000067 r6 : 00000000 r5 : 000d6c3d r4 : 000d6880 r3 : 000003fe r2 : 000003ff r1 : 000d6880 r0 : 000003fe Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user Control: 30c5387d Table: 8366ea00 DAC: fffffffd CPU: 0 PID: 2019 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 r6:84109fb0 r5:600c0193 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) r5:000c0193 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) r9:000d6c90 r8:84109f18 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) r10:000d6c90 r9:000d6c90 r8:00000000 r7:df80200c r6:84301700 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) r7:84109fb0 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(0x84109fb0 to 0x84109ff8) 9fa0: 000003fe 000d6880 000003ff 000003fe 9fc0: 000d6880 000d6c3d 00000000 00000067 000d6880 000d6c90 000d6c90 00000000 9fe0: 000d6354 7e9fbcc4 00057234 76e8170c 600c0010 ffffffff r9:000d6c90 r8:5bd2d000 r7:84301700 r6:ffffffff r5:600c0010 r4:76e8170c