watchdog: BUG: soft lockup - CPU#0 stuck for 430s! [swapper/0:0] Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express PC is at arch_spin_lock arch/arm/include/asm/spinlock.h:74 [inline] PC is at do_raw_spin_lock include/linux/spinlock.h:187 [inline] PC is at __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] PC is at _raw_spin_lock+0x40/0x58 kernel/locking/spinlock.c:154 LR is at __raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline] LR is at _raw_spin_lock+0x18/0x58 kernel/locking/spinlock.c:154 pc : [<81abbef4>] lr : [<81abbecc>] psr: 80000113 sp : 82801b40 ip : 82801b40 fp : 82801b54 r10: 81c05450 r9 : 8338a840 r8 : 8427ce88 r7 : 8338a968 r6 : 00000000 r5 : 00000001 r4 : 8338a968 r3 : 0000b58f r2 : 0000b591 r1 : 00000000 r0 : 00000001 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 84c604c0 DAC: fffffffd Call trace: [<81abbeb4>] (_raw_spin_lock) from [<809c7a2c>] (class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline]) [<81abbeb4>] (_raw_spin_lock) from [<809c7a2c>] (gpio_mmio_set+0x44/0x80 drivers/gpio/gpio-mmio.c:234) r5:00000001 r4:8338a840 [<809c79e8>] (gpio_mmio_set) from [<809b81e8>] (gpiochip_set+0x1c/0x44 drivers/gpio/gpiolib.c:2919) r7:00000000 r6:00000000 r5:00000000 r4:83867cc0 [<809b81cc>] (gpiochip_set) from [<809baab0>] (gpiod_set_raw_value_commit+0x78/0x218 drivers/gpio/gpiolib.c:3662) [<809baa38>] (gpiod_set_raw_value_commit) from [<809bc350>] (gpiod_set_value_nocheck+0x44/0x58 drivers/gpio/gpiolib.c:3881) r10:81c05450 r9:82801c94 r8:00000102 r7:ffffd46a r6:0000002f r5:00000000 r4:83867cc0 [<809bc30c>] (gpiod_set_value_nocheck) from [<809bc3a0>] (gpiod_set_value+0x3c/0x88 drivers/gpio/gpiolib.c:3903) [<809bc364>] (gpiod_set_value) from [<809ccb3c>] (gpio_led_set+0x5c/0x60 drivers/leds/leds-gpio.c:57) r5:830fe044 r4:830fe044 [<809ccae0>] (gpio_led_set) from [<809ca3d4>] (__led_set_brightness drivers/leds/led-core.c:52 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca3d4>] (led_set_brightness_nopm drivers/leds/led-core.c:335 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca3d4>] (led_set_brightness_nosleep+0x38/0x44 drivers/leds/led-core.c:369) r5:830fe044 r4:84ac348c [<809ca39c>] (led_set_brightness_nosleep) from [<809cd438>] (led_heartbeat_function+0x84/0x144 drivers/leds/trigger/ledtrig-heartbeat.c:90) [<809cd3b4>] (led_heartbeat_function) from [<80327070>] (call_timer_fn+0x30/0x220 kernel/time/timer.c:1748) r7:ffffd46a r6:809cd3b4 r5:84ac348c r4:8281b500 [<80327040>] (call_timer_fn) from [<80327524>] (expire_timers kernel/time/timer.c:1799 [inline]) [<80327040>] (call_timer_fn) from [<80327524>] (__run_timers+0x2c4/0x3f8 kernel/time/timer.c:2373) r9:82801c94 r8:ffffd46a r7:00000000 r6:809cd3b4 r5:dddc5f00 r4:84ac348c [<80327260>] (__run_timers) from [<803276c0>] (__run_timer_base kernel/time/timer.c:2385 [inline]) [<80327260>] (__run_timers) from [<803276c0>] (__run_timer_base kernel/time/timer.c:2377 [inline]) [<80327260>] (__run_timers) from [<803276c0>] (run_timer_base+0x68/0x78 kernel/time/timer.c:2394) r10:8281b500 r9:82804d80 r8:00000102 r7:00000001 r6:00000082 r5:00000002 r4:dddc5f00 [<80327658>] (run_timer_base) from [<803276ec>] (run_timer_softirq+0x1c/0x34 kernel/time/timer.c:2404) r4:82804084 [<803276d0>] (run_timer_softirq) from [<8025b65c>] (handle_softirqs+0x140/0x458 kernel/softirq.c:622) [<8025b51c>] (handle_softirqs) from [<8025bad0>] (__do_softirq kernel/softirq.c:656 [inline]) [<8025b51c>] (handle_softirqs) from [<8025bad0>] (invoke_softirq kernel/softirq.c:496 [inline]) [<8025b51c>] (handle_softirqs) from [<8025bad0>] (__irq_exit_rcu+0x110/0x1d0 kernel/softirq.c:723) r10:00000000 r9:8281b500 r8:00000000 r7:82801dd8 r6:82443f98 r5:8247f0cc r4:8281b500 [<8025b9c0>] (__irq_exit_rcu) from [<8025be48>] (irq_exit+0x10/0x18 kernel/softirq.c:751) r5:8247f0cc r4:826c3a9c [<8025be38>] (irq_exit) from [<81aad964>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:295) [<81aad8e8>] (generic_handle_arch_irq) from [<80200bdc>] (__irq_svc+0x7c/0xbc arch/arm/kernel/entry-armv.S:228) Exception stack(0x82801dd8 to 0x82801e20) 1dc0: e041d008 00000005 1de0: 0000b58f 00000000 e041d008 00000005 00000001 8338a968 8427ce88 8338a840 1e00: 00000000 82801e3c 82801e28 82801e28 809c8228 809c822c 60000013 ffffffff r9:8281b500 r8:8427ce88 r7:82801e0c r6:ffffffff r5:60000013 r4:809c822c [<809c820c>] (gpio_mmio_write32) from [<809c7a4c>] (gpio_mmio_set+0x64/0x80 drivers/gpio/gpio-mmio.c:241) r5:00000004 r4:8338a840 [<809c79e8>] (gpio_mmio_set) from [<809b81e8>] (gpiochip_set+0x1c/0x44 drivers/gpio/gpiolib.c:2919) r7:00000001 r6:00000000 r5:00000002 r4:83867ce8 [<809b81cc>] (gpiochip_set) from [<809baab0>] (gpiod_set_raw_value_commit+0x78/0x218 drivers/gpio/gpiolib.c:3662) [<809baa38>] (gpiod_set_raw_value_commit) from [<809bc350>] (gpiod_set_value_nocheck+0x44/0x58 drivers/gpio/gpiolib.c:3881) r10:00000000 r9:00000000 r8:00000001 r7:dddce4c0 r6:83805fd8 r5:00000001 r4:83867ce8 [<809bc30c>] (gpiod_set_value_nocheck) from [<809bc3a0>] (gpiod_set_value+0x3c/0x88 drivers/gpio/gpiolib.c:3903) [<809bc364>] (gpiod_set_value) from [<809ccb3c>] (gpio_led_set+0x5c/0x60 drivers/leds/leds-gpio.c:57) r5:000000ff r4:830fe224 [<809ccae0>] (gpio_led_set) from [<809ca464>] (__led_set_brightness drivers/leds/led-core.c:52 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca464>] (led_set_brightness_nopm drivers/leds/led-core.c:335 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca464>] (led_set_brightness_nosleep drivers/leds/led-core.c:369 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca464>] (led_set_brightness+0x84/0x90 drivers/leds/led-core.c:328) r5:000000ff r4:830fe224 [<809ca3e0>] (led_set_brightness) from [<809cbfe4>] (led_trigger_event drivers/leds/led-triggers.c:420 [inline]) [<809ca3e0>] (led_set_brightness) from [<809cbfe4>] (led_trigger_event+0x40/0x58 drivers/leds/led-triggers.c:408) r5:000000ff r4:830fe224 [<809cbfa4>] (led_trigger_event) from [<809cd640>] (ledtrig_cpu+0xac/0xf4 drivers/leds/trigger/ledtrig-cpu.c:86) r7:dddce4c0 r6:00000002 r5:82b15cd8 r4:000000fe [<809cd594>] (ledtrig_cpu) from [<80227a38>] (arch_cpu_idle_exit+0x14/0x18 arch/arm/kernel/process.c:98) r9:00000000 r8:00000000 r7:8280c710 r6:8281b500 r5:8280c6d0 r4:00000000 [<80227a24>] (arch_cpu_idle_exit) from [<802b168c>] (do_idle+0x5c/0x2d8 kernel/sched/idle.c:334) [<802b1630>] (do_idle) from [<802b1c38>] (cpu_startup_entry+0x30/0x34 kernel/sched/idle.c:430) r10:8281aff4 r9:8280c680 r8:823bec64 r7:00000000 r6:deffc06c r5:828222e8 r4:000000ed [<802b1c08>] (cpu_startup_entry) from [<81aaf37c>] (kernel_init+0x0/0x138 init/main.c:757) [<81aaf29c>] (rest_init) from [<8260145c>] (start_kernel+0x844/0x860 init/main.c:1206) [<82600c18>] (start_kernel) from [<00000000>] (0x0) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express PC is at arch_spin_lock arch/arm/include/asm/spinlock.h:74 [inline] PC is at do_raw_spin_lock include/linux/spinlock.h:187 [inline] PC is at __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] PC is at _raw_spin_lock+0x40/0x58 kernel/locking/spinlock.c:154 LR is at __raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline] LR is at _raw_spin_lock+0x18/0x58 kernel/locking/spinlock.c:154 pc : [<81abbef4>] lr : [<81abbecc>] psr: 80000013 sp : df865e58 ip : df865e58 fp : df865e6c r10: 00000000 r9 : 8338a840 r8 : 8427ce88 r7 : 8338a968 r6 : 00000001 r5 : 00000008 r4 : 8338a968 r3 : 0000b58f r2 : 0000b590 r1 : 00000000 r0 : 00000001 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 856cbe00 DAC: 00000000 Call trace: [<81abbeb4>] (_raw_spin_lock) from [<809c7a2c>] (class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline]) [<81abbeb4>] (_raw_spin_lock) from [<809c7a2c>] (gpio_mmio_set+0x44/0x80 drivers/gpio/gpio-mmio.c:234) r5:00000008 r4:8338a840 [<809c79e8>] (gpio_mmio_set) from [<809b81e8>] (gpiochip_set+0x1c/0x44 drivers/gpio/gpiolib.c:2919) r7:00000001 r6:00000000 r5:00000003 r4:83867cfc [<809b81cc>] (gpiochip_set) from [<809baab0>] (gpiod_set_raw_value_commit+0x78/0x218 drivers/gpio/gpiolib.c:3662) [<809baa38>] (gpiod_set_raw_value_commit) from [<809bc350>] (gpiod_set_value_nocheck+0x44/0x58 drivers/gpio/gpiolib.c:3881) r10:00000000 r9:00000000 r8:00000001 r7:ddde24c0 r6:83805998 r5:00000001 r4:83867cfc [<809bc30c>] (gpiod_set_value_nocheck) from [<809bc3a0>] (gpiod_set_value+0x3c/0x88 drivers/gpio/gpiolib.c:3903) [<809bc364>] (gpiod_set_value) from [<809ccb3c>] (gpio_led_set+0x5c/0x60 drivers/leds/leds-gpio.c:57) r5:000000ff r4:830fe314 [<809ccae0>] (gpio_led_set) from [<809ca464>] (__led_set_brightness drivers/leds/led-core.c:52 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca464>] (led_set_brightness_nopm drivers/leds/led-core.c:335 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca464>] (led_set_brightness_nosleep drivers/leds/led-core.c:369 [inline]) [<809ccae0>] (gpio_led_set) from [<809ca464>] (led_set_brightness+0x84/0x90 drivers/leds/led-core.c:328) r5:000000ff r4:830fe314 [<809ca3e0>] (led_set_brightness) from [<809cbfe4>] (led_trigger_event drivers/leds/led-triggers.c:420 [inline]) [<809ca3e0>] (led_set_brightness) from [<809cbfe4>] (led_trigger_event+0x40/0x58 drivers/leds/led-triggers.c:408) r5:000000ff r4:830fe314 [<809cbfa4>] (led_trigger_event) from [<809cd640>] (ledtrig_cpu+0xac/0xf4 drivers/leds/trigger/ledtrig-cpu.c:86) r7:ddde24c0 r6:00000002 r5:82b15cd8 r4:000001fd [<809cd594>] (ledtrig_cpu) from [<80227a38>] (arch_cpu_idle_exit+0x14/0x18 arch/arm/kernel/process.c:98) r9:00000000 r8:00000001 r7:8280c710 r6:83216000 r5:8280c6d0 r4:00000001 [<80227a24>] (arch_cpu_idle_exit) from [<802b168c>] (do_idle+0x5c/0x2d8 kernel/sched/idle.c:334) [<802b1630>] (do_idle) from [<802b1c38>] (cpu_startup_entry+0x30/0x34 kernel/sched/idle.c:430) r10:00000000 r9:414fc0f0 r8:80003000 r7:82a7b4a4 r6:83216000 r5:00000001 r4:00000092 [<802b1c08>] (cpu_startup_entry) from [<8022f360>] (secondary_start_kernel+0x128/0x194 arch/arm/kernel/smp.c:478) [<8022f238>] (secondary_start_kernel) from [<80220094>] (__enable_mmu+0x0/0xc arch/arm/kernel/head.S:446) r7:82a7b4a4 r6:30c0387d r5:00000000 r4:830b7bc0