INFO: task syz-executor.0:27683 blocked for more than 430 seconds. Not tainted 6.0.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack: 0 pid:27683 ppid: 27618 flags:0x00000001 Backtrace: [<8172edc8>] (__schedule) from [<8172f8c0>] (schedule+0x5c/0xac kernel/sched/core.c:6570) r10:83285e00 r9:00000000 r8:00000002 r7:00000000 r6:edc8de10 r5:83273ac0 r4:83273ac0 [<8172f864>] (schedule) from [<81734318>] (rt_mutex_slowlock_block.constprop.0+0x38/0x164 kernel/locking/rtmutex.c:1520) r5:83273ac0 r4:82adb054 [<817342e0>] (rt_mutex_slowlock_block.constprop.0) from [<817354e0>] (__rt_mutex_slowlock.constprop.0+0x78/0x23c kernel/locking/rtmutex.c:1588) r10:84ea7e10 r9:8520ba00 r8:edc8de10 r7:00000002 r6:82adb054 r5:00000000 r4:83273ac0 r3:edc8de10 [<81735468>] (__rt_mutex_slowlock.constprop.0) from [<81735750>] (__rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1624 [inline]) [<81735468>] (__rt_mutex_slowlock.constprop.0) from [<81735750>] (rt_mutex_slowlock kernel/locking/rtmutex.c:1653 [inline]) [<81735468>] (__rt_mutex_slowlock.constprop.0) from [<81735750>] (__rt_mutex_lock kernel/locking/rtmutex.c:1665 [inline]) [<81735468>] (__rt_mutex_slowlock.constprop.0) from [<81735750>] (__rt_mutex_lock_common kernel/locking/rtmutex_api.c:31 [inline]) [<81735468>] (__rt_mutex_slowlock.constprop.0) from [<81735750>] (rt_mutex_lock+0xac/0xc4 kernel/locking/rtmutex_api.c:71) r9:8520ba00 r8:84ea7e00 r7:00000005 r6:a0000013 r5:82adb054 r4:00000000 [<817356a4>] (rt_mutex_lock) from [<80eb72e4>] (i2c_adapter_lock_bus+0x14/0x18 drivers/i2c/i2c-core-base.c:826) r6:8520ba00 r5:00000005 r4:82adb040 [<80eb72d0>] (i2c_adapter_lock_bus) from [<80eb8fe0>] (i2c_lock_bus include/linux/i2c.h:792 [inline]) [<80eb72d0>] (i2c_adapter_lock_bus) from [<80eb8fe0>] (__i2c_lock_bus_helper drivers/i2c/i2c-core.h:44 [inline]) [<80eb72d0>] (i2c_adapter_lock_bus) from [<80eb8fe0>] (i2c_transfer+0x94/0x134 drivers/i2c/i2c-core-base.c:2166) [<80eb8f4c>] (i2c_transfer) from [<80ebdfb8>] (i2cdev_ioctl_rdwr+0x1f8/0x234 drivers/i2c/i2c-dev.c:297) r6:00000004 r5:00000004 r4:8520ba3c [<80ebddc0>] (i2cdev_ioctl_rdwr) from [<80ebe9c0>] (i2cdev_ioctl+0x2d4/0x34c drivers/i2c/i2c-dev.c:458) r10:83b8d050 r9:00000004 r8:82baa180 r7:20000340 r6:88cba800 r5:00000707 r4:20000340 [<80ebe6ec>] (i2cdev_ioctl) from [<804b9804>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<80ebe6ec>] (i2cdev_ioctl) from [<804b9804>] (do_vfs_ioctl fs/ioctl.c:830 [inline]) [<80ebe6ec>] (i2cdev_ioctl) from [<804b9804>] (__do_sys_ioctl fs/ioctl.c:868 [inline]) [<80ebe6ec>] (i2cdev_ioctl) from [<804b9804>] (sys_ioctl+0x110/0xa74 fs/ioctl.c:856) r6:82baa181 r5:00000000 r4:00000707 [<804b96f4>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xedc8dfa8 to 0xedc8dff0) dfa0: 00000000 00000000 00000004 00000707 20000340 00000000 dfc0: 00000000 00000000 0012bfd0 00000036 7ed553b2 76fbe6d0 7ed55544 76fbe20c dfe0: 76fbe020 76fbe010 00016420 0004c150 r10:00000036 r9:83273ac0 r8:80200288 r7:00000036 r6:0012bfd0 r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 6.0.0-rc6-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<81710714>] (dump_backtrace) from [<81710a44>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253) r7:00000000 r6:00000113 r5:60000193 r4:81d87dd8 [<81710a2c>] (show_stack) from [<81719910>] (__dump_stack lib/dump_stack.c:88 [inline]) [<81710a2c>] (show_stack) from [<81719910>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<817198c8>] (dump_stack_lvl) from [<81719934>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000001 r4:00000001 [<8171991c>] (dump_stack) from [<8082901c>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:111) [<80828ebc>] (nmi_cpu_backtrace) from [<8082916c>] (nmi_trigger_cpumask_backtrace+0x134/0x1d4 lib/nmi_backtrace.c:62) r7:8240c494 r6:00000000 r5:8240ccdc r4:00000001 [<80829038>] (nmi_trigger_cpumask_backtrace) from [<8021119c>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:855) r9:000b33c0 r8:82404d40 r7:00007f47 r6:8268999c r5:8240c5fc r4:88d7af38 [<80211184>] (arch_trigger_cpumask_backtrace) from [<8032fce4>] (trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]) [<80211184>] (arch_trigger_cpumask_backtrace) from [<8032fce4>] (check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]) [<80211184>] (arch_trigger_cpumask_backtrace) from [<8032fce4>] (watchdog+0x4a8/0x598 kernel/hung_task.c:369) [<8032f83c>] (watchdog) from [<80269f18>] (kthread+0xec/0x11c kernel/kthread.c:376) r10:00000000 r9:df819e4c r8:82a99ac0 r7:00000000 r6:8032f83c r5:828f4680 r4:82b609c0 [<80269e2c>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:148) Exception stack(0xdf8c9fb0 to 0xdf8c9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80269e2c r4:82b609c0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2016 Comm: klogd Not tainted 6.0.0-rc6-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x76de59bc LR is at 0x76de04c0 pc : [<76de59bc>] lr : [<76de04c0>] psr: 200f0010 sp : 7ecf0bd8 ip : 00000000 fp : 00000000 r10: 76eb6764 r9 : 00000000 r8 : 00002000 r7 : 76f0e080 r6 : 00019a60 r5 : 00000000 r4 : 00a2e5a8 r3 : 00a2fd48 r2 : 00000864 r1 : 00000000 r0 : 00a2e5a8 Flags: nzCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user Control: 30c5387d Table: 84151280 DAC: fffffffd CPU: 0 PID: 2016 Comm: klogd Not tainted 6.0.0-rc6-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: frame pointer underflow [<81710714>] (dump_backtrace) from [<81710a44>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253) r7:eb2d5fb0 r6:000f0193 r5:600f0193 r4:81d87dd8 [<81710a2c>] (show_stack) from [<81719910>] (__dump_stack lib/dump_stack.c:88 [inline]) [<81710a2c>] (show_stack) from [<81719910>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<817198c8>] (dump_stack_lvl) from [<81719934>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:00000001 [<8171991c>] (dump_stack) from [<8020917c>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:204) [<80209168>] (show_regs) from [<80828f64>] (nmi_cpu_backtrace+0xa8/0x17c lib/nmi_backtrace.c:109) [<80828ebc>] (nmi_cpu_backtrace) from [<80210390>] (do_handle_IPI+0x4c/0x3f0 arch/arm/kernel/smp.c:678) r7:00000017 r6:8190dcc8 r5:00000000 r4:00000007 [<80210344>] (do_handle_IPI) from [<80210754>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:706) r10:76eb6764 r9:00000000 r8:df801f78 r7:00000017 r6:8190dcc8 r5:8280cc40 r4:82888d00 r3:00000010 [<80210734>] (ipi_handler) from [<802ba8e8>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:930) [<802ba84c>] (handle_percpu_devid_irq) from [<802b41fc>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802ba84c>] (handle_percpu_devid_irq) from [<802b41fc>] (handle_irq_desc kernel/irq/irqdesc.c:648 [inline]) [<802ba84c>] (handle_percpu_devid_irq) from [<802b41fc>] (generic_handle_domain_irq+0x30/0x40 kernel/irq/irqdesc.c:704) r10:76eb6764 r9:00000000 r8:00000000 r7:df80a00c r6:822a91f0 r5:df80a000 r4:8240ccf4 r3:00010000 [<802b41cc>] (generic_handle_domain_irq) from [<8083b5d4>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372) [<8083b56c>] (gic_handle_irq) from [<8172cc2c>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:238) r7:eb2d5fb0 r6:81f38ab4 r5:81f38acc r4:822a91e4 [<8172cbcc>] (generic_handle_arch_irq) from [<8081c2a8>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40) r9:00000000 r8:822a2044 r7:83f62340 r6:ffffffff r5:200f0010 r4:76de59bc [<8081c28c>] (call_with_stack) from [<80200e74>] (__irq_usr+0x74/0x80 arch/arm/kernel/entry-armv.S:436) Exception stack(0xeb2d5fb0 to 0xeb2d5ff8) 5fa0: 00a2e5a8 00000000 00000864 00a2fd48 5fc0: 00a2e5a8 00000000 00019a60 76f0e080 00002000 00000000 76eb6764 00000000 5fe0: 00000000 7ecf0bd8 76de04c0 76de59bc 200f0010 ffffffff