INFO: task syz-executor.0:2231 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: 2231 ppid: 1 flags:0x00000001 Backtrace: [<816f4018>] (__schedule) from [<816f49dc>] (schedule+0x4c/0xcc kernel/sched/core.c:6323) r10:83970f2c r9:830e8000 r8:00000000 r7:839b9a14 r6:83970e00 r5:83725558 r4:8370b980 [<816f4990>] (schedule) from [<8070cae0>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:83725558 r4:837259c0 [<8070ca74>] (blk_mq_freeze_queue_wait) from [<8070f7c0>] (blk_freeze_queue block/blk-mq.c:205 [inline]) [<8070ca74>] (blk_mq_freeze_queue_wait) from [<8070f7c0>] (blk_mq_freeze_queue+0x1c/0x20 block/blk-mq.c:214) r5:83970e00 r4:83725550 [<8070f7a4>] (blk_mq_freeze_queue) from [<809ee890>] (__loop_clr_fd+0x70/0x430 drivers/block/loop.c:1122) r5:83970e00 r4:83970e00 [<809ee820>] (__loop_clr_fd) from [<809eecf4>] (lo_release+0xa4/0xa8 drivers/block/loop.c:1761) r10:8220c44c r9:830e8000 r8:00000000 r7:839b9a14 r6:00000001 r5:83970f2c r4:83970e00 [<809eec50>] (lo_release) from [<806f8d1c>] (blkdev_put_whole block/bdev.c:694 [inline]) [<809eec50>] (lo_release) from [<806f8d1c>] (blkdev_put+0xd4/0x278 block/bdev.c:956) r7:839b9a14 r6:839b99c0 r5:00000083 r4:830e8000 [<806f8c48>] (blkdev_put) from [<8047a8a0>] (kill_block_super+0x3c/0x74 fs/super.c:1400) r9:5ac3c35a r8:8220c490 r7:8220c920 r6:00000000 r5:00000083 r4:830e8000 [<8047a864>] (kill_block_super) from [<8047a96c>] (deactivate_locked_super+0x54/0xc8 fs/super.c:335) r5:82317b08 r4:84eb6c00 [<8047a918>] (deactivate_locked_super) from [<8047aa40>] (deactivate_super fs/super.c:366 [inline]) [<8047a918>] (deactivate_locked_super) from [<8047aa40>] (deactivate_super+0x60/0x64 fs/super.c:362) r5:8409db40 r4:84eb6c00 [<8047a9e0>] (deactivate_super) from [<8049edf8>] (cleanup_mnt+0x11c/0x180 fs/namespace.c:1137) r5:8409db40 r4:00000002 [<8049ecdc>] (cleanup_mnt) from [<8049eecc>] (__cleanup_mnt+0x14/0x18 fs/namespace.c:1144) r9:5ac3c35a r8:0000082c r7:8243d600 r6:8370b980 r5:8370c17c r4:00000000 [<8049eeb8>] (__cleanup_mnt) from [<802660ec>] (task_work_run+0x9c/0xcc kernel/task_work.c:164) [<80266050>] (task_work_run) from [<8020bc44>] (tracehook_notify_resume include/linux/tracehook.h:189 [inline]) [<80266050>] (task_work_run) from [<8020bc44>] (do_work_pending+0x428/0x51c arch/arm/kernel/signal.c:630) r9:5ac3c35a r8:80200244 r7:fffffe30 r6:80200244 r5:8428ffb0 r4:8370b980 [<8020b81c>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20) Exception stack(0x8428ffb0 to 0x8428fff8) ffa0: 00000000 0000000a 00000000 00000000 ffc0: 00085150 7ea11510 00120000 00000034 00085150 0225efc8 00000000 7ea114d0 ffe0: 7f0302ff 7ea11494 00014734 0004ce3c 60000010 7ea11510 r10:00000034 r9:8370b980 r8:80200244 r7:00000034 r6:00120000 r5:7ea11510 r4:00085150 NMI backtrace for cpu 1 CPU: 1 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) r5:00000001 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) r9:0005efc0 r8:82204d00 r7:8220c5d4 r6:8221af58 r5:00007f6b r4:82b82f68 [<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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.0-syzkaller #0 Hardware name: ARM-Versatile Express PC is at run_timer_softirq+0x38c/0x468 kernel/time/timer.c:1750 LR is at expire_timers kernel/time/timer.c:1467 [inline] LR is at __run_timers kernel/time/timer.c:1734 [inline] LR is at run_timer_softirq+0x32c/0x468 kernel/time/timer.c:1747 pc : [<802d48b4>] lr : [<802d4854>] psr: a0000113 sp : 82201d80 ip : 82201d80 fp : 82201df4 r10: dddcc600 r9 : 0005efc2 r8 : 00000000 r7 : 823d0dd4 r6 : 82201da0 r5 : 00000000 r4 : 83f3018c r3 : 0000bcbc r2 : 820ac600 r1 : 5bd20000 r0 : dddcc600 Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8444b640 DAC: fffffffd CPU: 0 PID: 0 Comm: swapper/0 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) r7:00000000 r6:82201d30 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) r5:00000000 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) r7:00000000 r6:8221a9c0 r5:8280cb80 r4:00000007 [<8020f8b8>] (do_handle_IPI) from [<8020fc24>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708) r9:8221a9c0 r8:00000000 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:dddcc600 r9:8221a9c0 r8:00000000 r7:df80200c r6:8221a9c0 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) r7:82201d64 r6:00000000 r5:82201d30 r4:820b2e38 [<816f20fc>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x4c arch/arm/kernel/entry-armv.S:202) Exception stack(0x82201d30 to 0x82201d78) 1d20: dddcc600 5bd20000 820ac600 0000bcbc 1d40: 83f3018c 00000000 82201da0 823d0dd4 00000000 0005efc2 dddcc600 82201df4 1d60: 82201d80 82201d80 802d4854 802d48b4 a0000113 ffffffff r7:82201d64 r6:ffffffff r5:a0000113 r4:802d48b4 [<802d4528>] (run_timer_softirq) from [<80201208>] (__do_softirq+0x148/0x3d8 kernel/softirq.c:558) r10:8221a9c0 r9:00000082 r8:00000100 r7:82201ed4 r6:00000001 r5:00000002 r4:82204084 [<802010c0>] (__do_softirq) from [<80249da8>] (do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]) [<802010c0>] (__do_softirq) from [<80249da8>] (invoke_softirq kernel/softirq.c:439 [inline]) [<802010c0>] (__do_softirq) from [<80249da8>] (__irq_exit_rcu kernel/softirq.c:636 [inline]) [<802010c0>] (__do_softirq) from [<80249da8>] (__irq_exit_rcu kernel/softirq.c:626 [inline]) [<802010c0>] (__do_softirq) from [<80249da8>] (irq_exit+0x80/0xa8 kernel/softirq.c:660) r10:00000000 r9:8221a9c0 r8:00000001 r7:82201ed4 r6:00000000 r5:82201ea0 r4:8221a9c0 [<80249d28>] (irq_exit) from [<816f2144>] (generic_handle_arch_irq+0x48/0x4c kernel/irq/handle.c:245) r5:82201ea0 r4:820b2e38 [<816f20fc>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x4c arch/arm/kernel/entry-armv.S:202) Exception stack(0x82201ea0 to 0x82201ee8) 1ea0: 006fac60 00000000 00000000 8021bfe0 8221a9c0 8220c494 00000000 8220c4d4 1ec0: 00000001 00000000 00000000 82201efc 82201f00 82201ef0 80208ab8 80208abc 1ee0: 60000013 ffffffff r7:82201ed4 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 r4:8221a9c0 [<8027fa58>] (do_idle) from [<8027ffdc>] (cpu_startup_entry+0x20/0x24 kernel/sched/idle.c:403) r10:8243c000 r9:8221a534 r8:00000000 r7:deffc1c0 r6:8220c440 r5:8208ca68 r4:000000e4 [<8027ffbc>] (cpu_startup_entry) from [<816f28bc>] (rest_init+0xb0/0xb8 init/main.c:725) [<816f280c>] (rest_init) from [<82000a8c>] (arch_call_rest_init+0x10/0x14) r5:8208ca68 r4:8243c068 [<82000a7c>] (arch_call_rest_init) from [<820011f4>] (start_kernel+0x704/0x75c init/main.c:1135) [<82000af0>] (start_kernel) from [<00000000>] (0x0)