INFO: task syz-executor.0:28469 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:28469 ppid: 2234 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:82bf87d8 r9:85193e00 r8:84bb8a00 r7:83ad2900 r6:83ad2900 r5:83a1b8e8 r4:842f6780 [<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:83a1b8e8 r4:83a1bd50 [<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) r5:85193e00 r4:83a1b8e0 [<8071db4c>] (blk_mq_freeze_queue) from [<80a00d6c>] (nbd_add_socket+0x70/0x208 drivers/block/nbd.c:1109) r5:85193e00 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) r9:85193e00 r8:83ad2980 r7:83108880 r6:83ad2900 r5:00000004 r4:0000ab00 [<80a00f04>] (nbd_ioctl) from [<807268dc>] (blkdev_ioctl+0x364/0xc58 block/ioctl.c:609) r10:82bf87d8 r9:00000003 r8:480a001d r7:00000004 r6:83108880 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) r10:82bf87d8 r9:00000003 r8:841c6f00 r7:00000004 r6:841c6f01 r5:00000000 r4:0000ab00 [<80498f98>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x85223fa8 to 0x85223ff0) 3fa0: 00000000 00000000 00000003 0000ab00 00000004 00000000 3fc0: 00000000 00000000 00000000 00000036 7ecdd31a 76fbc6d0 7ecdd4a4 76fbc20c 3fe0: 76fbc048 76fbc038 00018e9c 0004ba40 r10:00000036 r9:842f6780 r8:80200244 r7:00000036 r6:00000000 r5:00000000 r4:00000000 INFO: task syz-executor.0:28476 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:28476 ppid: 2234 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:82bf87d8 r9:85193e00 r8:83ad2984 r7:8540fdec r6:00000002 r5:834ad080 r4:834ad080 [<81712e04>] (schedule) from [<81713474>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:6385) r5:834ad080 r4:83ad2980 [<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) r9:85193e00 r8:83ad2980 r7:83108880 r6:83ad2900 r5:00000004 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) r10:82bf87d8 r9:00000003 r8:480a001d r7:00000004 r6:83108880 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) r10:82bf87d8 r9:00000003 r8:84e19f00 r7:00000004 r6:84e19f01 r5:00000000 r4:0000ab00 [<80498f98>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x8540ffa8 to 0x8540fff0) ffa0: 00000000 00000000 00000003 0000ab00 00000004 00000000 ffc0: 00000000 00000000 00000000 00000036 7ecdd31a 76f7a6d0 7ecdd4a4 76f7a20c ffe0: 76f7a048 76f7a038 00018e9c 0004ba40 r10:00000036 r9:834ad080 r8:80200244 r7:00000036 r6:00000000 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) r9:000b4e00 r8:82204d00 r7:00007f64 r6:824839b0 r5:8220c5d4 r4:82ba9a40 [<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: 2016 Comm: syslogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at arm_copy_from_user+0x78/0x370 arch/arm/lib/copy_template.S:117 LR is at 0x692e7265 pc : [<80830148>] lr : [<692e7265>] psr: 800f0013 sp : 8413dd64 ip : 73752072 fp : 8413ddec r10: 00000000 r9 : 8413dee8 r8 : 656c6c61 r7 : 6b7a7973 r6 : 2038323a r5 : 38303a32 r4 : 30203120 r3 : 206e614a r2 : ffffffe9 r1 : 01d514d8 r0 : ffefdf80 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8435ea00 DAC: fffffffd CPU: 0 PID: 2016 Comm: syslogd 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 r6:8413dd18 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) r9:842fe780 r8:8413dc80 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) r10:00000000 r9:842fe780 r8:00000000 r7:df80200c r6:842fe780 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) r7:8413dd18 r6:81f092c0 r5:81f092d8 r4:820a5fb8 [<81710204>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x8413dd18 to 0x8413dd60) dd00: ffefdf80 01d514d8 dd20: ffffffe9 206e614a 30203120 38303a32 2038323a 6b7a7973 656c6c61 8413dee8 dd40: 00000000 8413ddec 73752072 8413dd64 692e7265 80830148 800f0013 ffffffff r9:842fe780 r8:656c6c61 r7:8413dd4c r6:ffffffff r5:800f0013 r4:80830148 [<8075e8c8>] (copy_page_from_iter_atomic) from [<803d5a68>] (generic_perform_write+0xe8/0x200 mm/filemap.c:3764) r10:8413def0 r9:00000000 r8:83615088 r7:00000000 r6:81817340 r5:0002bf60 r4:00000089 [<803d5980>] (generic_perform_write) from [<803d6e68>] (__generic_file_write_iter+0x12c/0x190 mm/filemap.c:3883) r10:8413def0 r9:84782840 r8:83615088 r7:00000000 r6:842fe780 r5:8413df08 r4:00000000 [<803d6d3c>] (__generic_file_write_iter) from [<803d6f30>] (generic_file_write_iter+0x64/0xd0 mm/filemap.c:3915) r10:00004004 r9:842fe780 r8:8413df68 r7:8413def0 r6:8413df08 r5:83615000 r4:00000089 [<803d6ecc>] (generic_file_write_iter) from [<80482a84>] (call_write_iter include/linux/fs.h:2162 [inline]) [<803d6ecc>] (generic_file_write_iter) from [<80482a84>] (new_sync_write fs/read_write.c:503 [inline]) [<803d6ecc>] (generic_file_write_iter) from [<80482a84>] (vfs_write+0x30c/0x444 fs/read_write.c:590) r7:00000000 r6:00000089 r5:84782840 r4:00000010 [<80482778>] (vfs_write) from [<80482d24>] (ksys_write+0x68/0xec fs/read_write.c:643) r10:00000004 r9:842fe780 r8:80200244 r7:00000000 r6:0002bf60 r5:84782840 r4:84782840 [<80482cbc>] (ksys_write) from [<80482db8>] (__do_sys_write fs/read_write.c:655 [inline]) [<80482cbc>] (ksys_write) from [<80482db8>] (sys_write+0x10/0x14 fs/read_write.c:652) r7:00000004 r6:76ff2080 r5:01d514b8 r4:00000003 [<80482da8>] (sys_write) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x8413dfa8 to 0x8413dff0) dfa0: 00000003 01d514b8 00000003 01d514b8 00000089 00000000 dfc0: 00000003 01d514b8 76ff2080 00000004 000d6c84 000d6cb0 000d6c90 7eb31c9c dfe0: 000d63bc 7eb31bb0 00019aa8 76f167bc