INFO: task syz-executor.1:9817 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: 9817 ppid: 2266 flags:0x00000001 Backtrace: [<816d5388>] (__schedule) from [<816d5de0>] (schedule+0x54/0xdc kernel/sched/core.c:6326) r10:836bdb00 r9:82c84880 r8:8220c920 r7:8220c5b8 r6:8220c490 r5:836bdb08 r4:83fe9700 [<816d5d8c>] (schedule) from [<8071ae2c>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178) r5:836bdb08 r4:836bdf70 [<8071adc0>] (blk_mq_freeze_queue_wait) from [<807285d8>] (del_gendisk+0x17c/0x20c block/genhd.c:623) r5:8388c480 r4:00000008 [<8072845c>] (del_gendisk) from [<809bebac>] (loop_remove+0x20/0x58 drivers/block/loop.c:2080) r10:83825348 r9:0000000b r8:850ca600 r7:00000000 r6:83848b2c r5:8234b6b0 r4:83848a00 r3:83fe9700 [<809beb8c>] (loop_remove) from [<809bf210>] (loop_control_remove drivers/block/loop.c:2137 [inline]) [<809beb8c>] (loop_remove) from [<809bf210>] (loop_control_ioctl+0x1d8/0x1fc drivers/block/loop.c:2175) r5:83848a00 r4:00000000 [<809bf038>] (loop_control_ioctl) from [<804992d8>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<809bf038>] (loop_control_ioctl) from [<804992d8>] (do_vfs_ioctl fs/ioctl.c:834 [inline]) [<809bf038>] (loop_control_ioctl) from [<804992d8>] (__do_sys_ioctl fs/ioctl.c:872 [inline]) [<809bf038>] (loop_control_ioctl) from [<804992d8>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860) r6:850ca601 r5:00000000 r4:00004c81 [<804991c8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x83fb9fa8 to 0x83fb9ff0) 9fa0: 00000000 00000000 0000000b 00004c81 00000000 00000000 9fc0: 00000000 00000000 00000000 00000036 7eef831a 76fda6d0 7eef84a4 76fda20c 9fe0: 76fda048 76fda038 00018e9c 0004ba40 r10:00000036 r9:83fe9700 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: [<816b8658>] (dump_backtrace) from [<816b8844>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000001 r6:00000000 r5:60000193 r4:81d6031c [<816b882c>] (show_stack) from [<816c129c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b882c>] (show_stack) from [<816c129c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c1254>] (dump_stack_lvl) from [<816c12c0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000113 r4:00000001 [<816c12a8>] (dump_stack) from [<807ff90c>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:111) [<807ff7f8>] (nmi_cpu_backtrace) from [<807ffa90>] (nmi_trigger_cpumask_backtrace+0x118/0x1d4 lib/nmi_backtrace.c:62) r7:00000001 r6:8220c494 r5:8220cc70 r4:00000000 [<807ff978>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865) r9:00067d40 r8:82204d00 r7:00007f62 r6:824839b0 r5:8220c5d4 r4:82ba3240 [<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 r6:828cf180 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: 2021 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] PC is at _raw_spin_unlock_irqrestore+0x28/0x54 kernel/locking/spinlock.c:194 LR is at spin_unlock_irqrestore include/linux/spinlock.h:404 [inline] LR is at __wake_up_common_lock+0x8c/0xc0 kernel/sched/wait.c:140 pc : [<816dc5b0>] lr : [<802951c8>] psr: 600f0013 sp : 83fbfd68 ip : 83fbfd78 fp : 83fbfd74 r10: 000000c3 r9 : 83fbfd80 r8 : 00000001 r7 : 00000010 r6 : 8309b1c0 r5 : a00f0013 r4 : 00000000 r3 : 00000b05 r2 : 8309b1c4 r1 : a00f0013 r0 : 8309b1c0 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 841e5080 DAC: fffffffd CPU: 0 PID: 2021 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<816b8658>] (dump_backtrace) from [<816b8844>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237) r7:00000017 r6:83fbfd18 r5:600f0193 r4:81d6031c [<816b882c>] (show_stack) from [<816c129c>] (__dump_stack lib/dump_stack.c:88 [inline]) [<816b882c>] (show_stack) from [<816c129c>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<816c1254>] (dump_stack_lvl) from [<816c12c0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:000f0193 r4:00000000 [<816c12a8>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199) [<8020906c>] (show_regs) from [<807ff8f4>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:109) [<807ff7f8>] (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) r9:836e0000 r8:83fbfc80 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) r10:000000c3 r9:836e0000 r8:00000000 r7:df80200c r6:836e0000 r5:00000007 r4:82888000 r3:802b94bc [<802b2b80>] (generic_handle_domain_irq) from [<80812624>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c [<808125bc>] (gic_handle_irq) from [<816d31ec>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243) r7:83fbfd18 r6:81f094b4 r5:81f094cc r4:820a5fb8 [<816d318c>] (generic_handle_arch_irq) from [<80200abc>] (__irq_svc+0x3c/0x64 arch/arm/kernel/entry-armv.S:202) Exception stack(0x83fbfd18 to 0x83fbfd60) fd00: 8309b1c0 a00f0013 fd20: 8309b1c4 00000b05 00000000 a00f0013 8309b1c0 00000010 00000001 83fbfd80 fd40: 000000c3 83fbfd74 83fbfd78 83fbfd68 802951c8 816dc5b0 600f0013 ffffffff r9:836e0000 r8:00000001 r7:83fbfd4c r6:ffffffff r5:600f0013 r4:816dc5b0 [<816dc588>] (_raw_spin_unlock_irqrestore) from [<802951c8>] (spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]) [<816dc588>] (_raw_spin_unlock_irqrestore) from [<802951c8>] (__wake_up_common_lock+0x8c/0xc0 kernel/sched/wait.c:140) [<8029513c>] (__wake_up_common_lock) from [<8029524c>] (__wake_up_sync_key+0x28/0x30 kernel/sched/wait.c:205) r10:843ea0c0 r9:00000002 r8:82bd8c00 r7:82bd8300 r6:0000004a r5:8309b400 r4:82bd8300 [<80295224>] (__wake_up_sync_key) from [<81265140>] (sock_def_readable+0x40/0x74 net/core/sock.c:3136) [<81265100>] (sock_def_readable) from [<814e85b8>] (unix_dgram_sendmsg+0x4bc/0x8f4 net/unix/af_unix.c:1941) r5:8309b400 r4:82bd8574 [<814e80fc>] (unix_dgram_sendmsg) from [<812608e0>] (sock_sendmsg_nosec net/socket.c:704 [inline]) [<814e80fc>] (unix_dgram_sendmsg) from [<812608e0>] (sock_sendmsg+0x3c/0x4c net/socket.c:724) r10:00000121 r9:836e0000 r8:80200244 r7:00004000 r6:00000000 r5:8309b400 r4:83fbfeb0 [<812608a4>] (sock_sendmsg) from [<8126282c>] (__sys_sendto+0xcc/0x118 net/socket.c:2036) r5:8309b400 r4:00000000 [<81262760>] (__sys_sendto) from [<812628bc>] (__do_sys_send net/socket.c:2058 [inline]) [<81262760>] (__sys_sendto) from [<812628bc>] (sys_send+0x20/0x28 net/socket.c:2055) r7:00000121 r6:00000001 r5:76fe7080 r4:00221190 [<8126289c>] (sys_send) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0x83fbffa8 to 0x83fbfff0) ffa0: 00221190 76fe7080 00000003 00229a58 0000004a 00004000 ffc0: 00221190 76fe7080 00000001 00000121 7ef39cc0 00000000 76fe7080 00000000 ffe0: 00000000 7ef39bf8 76f18b88 76f1de78