INFO: task syz-executor.1:2635 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: 2635 ppid: 2263 flags:0x00000001 Backtrace: [<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:839a5160 r9:8526b100 r8:84564780 r7:82b7a400 r6:82b7a400 r5:836e0008 r4:836d4500 [<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:836e0008 r4:836e0470 [<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) r5:8526b100 r4:836e0000 [<8071db4c>] (blk_mq_freeze_queue) from [<80a00d6c>] (nbd_add_socket+0x70/0x208 drivers/block/nbd.c:1109) r5:8526b100 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) r9:8526b100 r8:82b7a480 r7:82c80440 r6:82b7a400 r5:00000007 r4:0000ab00 [<80a00f04>] (nbd_ioctl) from [<807268dc>] (blkdev_ioctl+0x364/0xc58 block/ioctl.c:609) r10:839a5160 r9:00000003 r8:480a001d r7:00000007 r6:82c80440 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) r10:839a5160 r9:00000003 r8:851f5b40 r7:00000007 r6:851f5b41 r5:00000000 r4:0000ab00 [<80498f98>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x8543dfa8 to 0x8543dff0) dfa0: 00000000 00000000 00000003 0000ab00 00000007 00000000 dfc0: 00000000 00000000 00000000 00000036 7ef0f31a 76f1d6d0 7ef0f4a4 76f1d20c dfe0: 76f1d048 76f1d038 00018e9c 0004ba40 r10:00000036 r9:836d4500 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 r5:60090093 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) r5:00090013 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) r9:0005c001 r8:82204d00 r7:00007f68 r6:824839b0 r5:8220c5d4 r4:83c36340 [<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: 2019 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at vsnprintf+0x64/0x40c lib/vsprintf.c:2755 LR is at sprintf+0x38/0x60 lib/vsprintf.c:3007 pc : [<8084b438>] lr : [<8084b8c0>] psr: 200d0013 sp : 83cb9ce0 ip : 00000000 fp : 83cb9d34 r10: 83cb9cfc r9 : ffffffff r8 : 00000400 r7 : 83cb9d58 r6 : 83cb9e58 r5 : 81d57fa8 r4 : 00000001 r3 : 7c346243 r2 : 7fffffff r1 : 7fffffff r0 : 0000003c Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 83418780 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 r6:83cb9c90 r5:600d0193 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) r5:000d0193 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) r9:83f5dc00 r8:83cb9bf8 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) r10:83cb9cfc r9:83f5dc00 r8:00000000 r7:df80200c r6:83f5dc00 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) r7:83cb9c90 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(0x83cb9c90 to 0x83cb9cd8) 9c80: 0000003c 7fffffff 7fffffff 7c346243 9ca0: 00000001 81d57fa8 83cb9e58 83cb9d58 00000400 ffffffff 83cb9cfc 83cb9d34 9cc0: 00000000 83cb9ce0 8084b8c0 8084b438 200d0013 ffffffff r9:83f5dc00 r8:00000400 r7:83cb9cc4 r6:ffffffff r5:200d0013 r4:8084b438 [<8084b3d4>] (vsnprintf) from [<8084b8c0>] (sprintf+0x38/0x60 lib/vsprintf.c:3007) r10:000003fe r9:00000001 r8:00000400 r7:83cb9dbc r6:83cb9e58 r5:85067c00 r4:00000001 [<8084b888>] (sprintf) from [<802adbf4>] (print_syslog kernel/printk/printk.c:1254 [inline]) [<8084b888>] (sprintf) from [<802adbf4>] (info_print_prefix+0xdc/0x184 kernel/printk/printk.c:1284) r3:00000006 r2:00000006 r1:81d57fa8 [<802adb18>] (info_print_prefix) from [<802adce4>] (record_print_text+0x48/0x150 kernel/printk/printk.c:1336) r10:000003fe r9:00000000 r8:00000400 r7:00000000 r6:0000070a r5:85067c00 r4:0000004d [<802adc9c>] (record_print_text) from [<802ae830>] (syslog_print+0x1f8/0x370 kernel/printk/printk.c:1536) r10:8222a09c r9:8243ef68 r8:000003ff r7:000d6880 r6:0000070a r5:8243f0b8 r4:00000000 [<802ae638>] (syslog_print) from [<802aea98>] (do_syslog.part.0+0xf0/0x33c kernel/printk/printk.c:1655) r10:00000067 r9:00000000 r8:80200244 r7:00000067 r6:000003ff r5:000d6880 r4:00000002 [<802ae9a8>] (do_syslog.part.0) from [<802b00ec>] (do_syslog kernel/printk/printk.c:1640 [inline]) [<802ae9a8>] (do_syslog.part.0) from [<802b00ec>] (__do_sys_syslog kernel/printk/printk.c:1747 [inline]) [<802ae9a8>] (do_syslog.part.0) from [<802b00ec>] (sys_syslog+0x3c/0x40 kernel/printk/printk.c:1745) r10:00000067 r9:83f5dc00 r8:80200244 r7:00000067 r6:000003ff r5:000d6880 r4:00000002 [<802b00b0>] (sys_syslog) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x83cb9fa8 to 0x83cb9ff0) 9fa0: 000d6880 000d6b5e 00000002 000d6880 000003ff 000003fe 9fc0: 000d6880 000d6b5e 00000000 00000067 000d6880 000d6c90 000d6c90 00000000 9fe0: 000d6354 7efc8cc4 00057234 76ed670c r7:00000067 r6:00000000 r5:000d6b5e r4:000d6880