INFO: task syz-executor.1:4693 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.1 state:D stack: 0 pid: 4693 ppid: 2264 flags:0x00000001 Backtrace: [<81712440>] (__schedule) from [<81712e98>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:8377db00 r9:83104440 r8:8220c920 r7:8220c5b8 r6:8220c490 r5:8377db08 r4:84e87300 [<81712e44>] (schedule) from [<8071ac24>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:8377db08 r4:8377df70 [<8071abb8>] (blk_mq_freeze_queue_wait) from [<807283d0>] (del_gendisk+0x17c/0x20c block/genhd.c:623) r5:838ff240 r4:00000008 [<80728254>] (del_gendisk) from [<809fc04c>] (loop_remove+0x20/0x58 drivers/block/loop.c:2080) r10:83849900 r9:00000003 r8:84813cc0 r7:00000000 r6:8384fd2c r5:8234b6b0 r4:8384fc00 r3:84e87300 [<809fc02c>] (loop_remove) from [<809fc6b0>] (loop_control_remove drivers/block/loop.c:2137 [inline]) [<809fc02c>] (loop_remove) from [<809fc6b0>] (loop_control_ioctl+0x1d8/0x1fc drivers/block/loop.c:2175) r5:8384fc00 r4:00000000 [<809fc4d8>] (loop_control_ioctl) from [<804990d0>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<809fc4d8>] (loop_control_ioctl) from [<804990d0>] (do_vfs_ioctl fs/ioctl.c:834 [inline]) [<809fc4d8>] (loop_control_ioctl) from [<804990d0>] (__do_sys_ioctl fs/ioctl.c:872 [inline]) [<809fc4d8>] (loop_control_ioctl) from [<804990d0>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860) r6:84813cc1 r5:00000000 r4:00004c81 [<80498fc0>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x84f6bfa8 to 0x84f6bff0) bfa0: 00000000 00000000 00000003 00004c81 00000000 00000000 bfc0: 00000000 00000000 ffffffff 00000036 7eb7631a 76f3c6d0 7eb764a4 76f3c20c bfe0: 76f3c048 76f3c038 00018e9c 0004ba40 r10:00000036 r9:84e87300 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: [<816f5710>] (dump_backtrace) from [<816f58fc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000001 r6:00000000 r5:60000093 r4:81d60190 [<816f58e4>] (show_stack) from [<816fe354>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58e4>] (show_stack) from [<816fe354>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe30c>] (dump_stack_lvl) from [<816fe378>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000013 r4:00000001 [<816fe360>] (dump_stack) from [<8083cdac>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:111) [<8083cc98>] (nmi_cpu_backtrace) from [<8083cf30>] (nmi_trigger_cpumask_backtrace+0x118/0x1d4 lib/nmi_backtrace.c:62) r7:00000001 r6:8220c494 r5:8220cc70 r4:00000000 [<8083ce18>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:0007ba81 r8:82204d00 r7:00007f66 r6:824839b0 r5:8220c5d4 r4:83edda40 [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329fa4>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329fa4>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]) [<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329fa4>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295) [<80329b04>] (watchdog) from [<8026a518>] (kthread+0x164/0x198 kernel/kthread.c:327) r10:8294de4c r9:00000000 r8:00000000 r7:80329b04 r6:828cf200 r5:82b03200 r4:829b0b80 [<8026a3b4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:146) Exception stack(0x82a5dfb0 to 0x82a5dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026a3b4 r4:82b03200 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at arch_cpu_idle+0x48/0x4c arch/arm/kernel/process.c:77 LR is at arch_cpu_idle+0x44/0x4c arch/arm/kernel/process.c:75 pc : [<80208ddc>] lr : [<80208dd8>] psr: 20000013 sp : 82201ee8 ip : 82201ed8 fp : 82201ef4 r10: 00000000 r9 : 00000000 r8 : 00000001 r7 : 8220c4d4 r6 : 00000000 r5 : 00000000 r4 : 8221a9c0 r3 : 8021ca60 r2 : 00000000 r1 : 81d60190 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8298fb00 DAC: fffffffd CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816f5710>] (dump_backtrace) from [<816f58fc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:82201e98 r5:60000193 r4:81d60190 [<816f58e4>] (show_stack) from [<816fe354>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816f58e4>] (show_stack) from [<816fe354>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816fe30c>] (dump_stack_lvl) from [<816fe378>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000193 r4:00000000 [<816fe360>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<8083cd94>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:109) [<8083cc98>] (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) r9:8221a9c0 r8:82201e00 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00 [<802100c0>] (ipi_handler) from [<802b9558>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933) [<802b94bc>] (handle_percpu_devid_irq) from [<802b2bc8>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802b94bc>] (handle_percpu_devid_irq) from [<802b2bc8>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline]) [<802b94bc>] (handle_percpu_devid_irq) from [<802b2bc8>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680) r10:00000000 r9:8221a9c0 r8:00000000 r7:df80200c r6:8221a9c0 r5:00000007 r4:82888000 r3:802b94bc [<802b2b80>] (generic_handle_domain_irq) from [<8084fac4>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<8084fa5c>] (gic_handle_irq) from [<817102a4>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:82201e98 r6:81f092d4 r5:81f092ec r4:820a5fb8 [<81710244>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x82201e98 to 0x82201ee0) 1e80: 00000000 81d60190 1ea0: 00000000 8021ca60 8221a9c0 00000000 00000000 8220c4d4 00000001 00000000 1ec0: 00000000 82201ef4 82201ed8 82201ee8 80208dd8 80208ddc 20000013 ffffffff r9:8221a9c0 r8:00000001 r7:82201ecc r6:ffffffff r5:20000013 r4:80208ddc [<80208d94>] (arch_cpu_idle) from [<81719004>] (default_idle_call+0x38/0x19c kernel/sched/idle.c:112) [<81718fcc>] (default_idle_call) from [<80281700>] (cpuidle_idle_call kernel/sched/idle.c:194 [inline]) [<81718fcc>] (default_idle_call) from [<80281700>] (do_idle+0x220/0x2a8 kernel/sched/idle.c:306) r7:8220c4d4 r6:8221a9c0 r5:00000000 r4:8220c494 [<802814e0>] (do_idle) from [<80281a84>] (cpu_startup_entry+0x20/0x24 kernel/sched/idle.c:403) r10:8243c000 r9:8221a534 r8:00000000 r7:deffc1c0 r6:8220c440 r5:822267f8 r4:000000e4 [<80281a64>] (cpu_startup_entry) from [<81710c90>] (rest_init+0xd8/0xe0 init/main.c:725) [<81710bb8>] (rest_init) from [<82000a8c>] (arch_call_rest_init+0x10/0x14) r5:8207fa68 r4:8243c068 [<82000a7c>] (arch_call_rest_init) from [<820011f0>] (start_kernel+0x700/0x758 init/main.c:1135) [<82000af0>] (start_kernel) from [<00000000>] (0x0)