[syzbot] [gpio?] BUG: soft lockup in led_heartbeat_function
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syzbot
Dec 8, 2025, 7:44:28 PM (13 hours ago) Dec 8
to br...@kernel.org, linus....@linaro.org, linux...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: c2f2b01b74be Merge tag 'i3c/for-6.19' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17d2721a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4d5b48b67d177d90
dashboard link: https://syzkaller.appspot.com/bug?extid=7736397b23ea34050017
compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/98a89b9f34e4/non_bootable_disk-c2f2b01b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1d5b0c92d398/vmlinux-c2f2b01b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ab235c28e1ed/zImage-c2f2b01b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+773639...@syzkaller.appspotmail.com
watchdog: BUG: soft lockup - CPU#1 stuck for 430s! [swapper/1:0]
Modules linked in:
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 : [<81abb6f4>] lr : [<81abb6cc>] psr: 80000113
sp : df805d68 ip : df805d68 fp : df805d7c
r10: 81c05450 r9 : 83f73440 r8 : 83f0da88
r7 : 83f73568 r6 : 00000000 r5 : 00000001 r4 : 83f73568
r3 : 00006cc6 r2 : 00006cc8 r1 : 00000000 r0 : 00000001
Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 30c5387d Table: 84e31880 DAC: 00000000
Call trace: frame pointer underflow
[<81abb6b4>] (_raw_spin_lock) from [<809c74b8>] (class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline])
[<81abb6b4>] (_raw_spin_lock) from [<809c74b8>] (gpio_mmio_set+0x44/0x80 drivers/gpio/gpio-mmio.c:234)
r5:00000001 r4:83f73440
[<809c7474>] (gpio_mmio_set) from [<809b7c74>] (gpiochip_set+0x1c/0x44 drivers/gpio/gpiolib.c:2919)
r7:00000000 r6:00000000 r5:00000000 r4:8409a780
[<809b7c58>] (gpiochip_set) from [<809ba53c>] (gpiod_set_raw_value_commit+0x78/0x218 drivers/gpio/gpiolib.c:3662)
[<809ba4c4>] (gpiod_set_raw_value_commit) from [<809bbddc>] (gpiod_set_value_nocheck+0x44/0x58 drivers/gpio/gpiolib.c:3881)
r10:81c05450 r9:df805ebc r8:00000102 r7:ffffbf8d r6:0000000a r5:00000000
r4:8409a780
[<809bbd98>] (gpiod_set_value_nocheck) from [<809bbe2c>] (gpiod_set_value+0x3c/0x88 drivers/gpio/gpiolib.c:3903)
[<809bbdf0>] (gpiod_set_value) from [<809cc5c8>] (gpio_led_set+0x5c/0x60 drivers/leds/leds-gpio.c:57)
r5:832f7844 r4:832f7844
[<809cc56c>] (gpio_led_set) from [<809c9e60>] (__led_set_brightness drivers/leds/led-core.c:52 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9e60>] (led_set_brightness_nopm drivers/leds/led-core.c:335 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9e60>] (led_set_brightness_nosleep+0x38/0x44 drivers/leds/led-core.c:369)
r5:832f7844 r4:84b77dcc
[<809c9e28>] (led_set_brightness_nosleep) from [<809ccec4>] (led_heartbeat_function+0x84/0x144 drivers/leds/trigger/ledtrig-heartbeat.c:90)
[<809cce40>] (led_heartbeat_function) from [<80326f70>] (call_timer_fn+0x30/0x220 kernel/time/timer.c:1748)
r7:ffffbf8d r6:809cce40 r5:84b77dcc r4:83216000
[<80326f40>] (call_timer_fn) from [<80327424>] (expire_timers kernel/time/timer.c:1799 [inline])
[<80326f40>] (call_timer_fn) from [<80327424>] (__run_timers+0x2c4/0x3f8 kernel/time/timer.c:2373)
r9:df805ebc r8:ffffbf8d r7:00000000 r6:809cce40 r5:dddd9f00 r4:84b77dcc
[<80327160>] (__run_timers) from [<803275c0>] (__run_timer_base kernel/time/timer.c:2385 [inline])
[<80327160>] (__run_timers) from [<803275c0>] (__run_timer_base kernel/time/timer.c:2377 [inline])
[<80327160>] (__run_timers) from [<803275c0>] (run_timer_base+0x68/0x78 kernel/time/timer.c:2394)
r10:83216000 r9:82804d80 r8:00000102 r7:00000001 r6:00000082 r5:00000002
r4:dddd9f00
[<80327558>] (run_timer_base) from [<803275ec>] (run_timer_softirq+0x1c/0x34 kernel/time/timer.c:2404)
r4:82804084
[<803275d0>] (run_timer_softirq) from [<8025b55c>] (handle_softirqs+0x140/0x458 kernel/softirq.c:622)
[<8025b41c>] (handle_softirqs) from [<8025b9d0>] (__do_softirq kernel/softirq.c:656 [inline])
[<8025b41c>] (handle_softirqs) from [<8025b9d0>] (invoke_softirq kernel/softirq.c:496 [inline])
[<8025b41c>] (handle_softirqs) from [<8025b9d0>] (__irq_exit_rcu+0x110/0x1d0 kernel/softirq.c:723)
r10:00000000 r9:83216000 r8:00000000 r7:df865e08 r6:82443e68 r5:8247ef9c
r4:83216000
[<8025b8c0>] (__irq_exit_rcu) from [<8025bd48>] (irq_exit+0x10/0x18 kernel/softirq.c:751)
r5:8247ef9c r4:826c3a9c
[<8025bd38>] (irq_exit) from [<81aad164>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:295)
[<81aad0e8>] (generic_handle_arch_irq) from [<81a7d0fc>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40)
r9:83216000 r8:83f0da88 r7:df865e3c r6:ffffffff r5:60000013 r4:809c7cb8
[<81a7d0e0>] (call_with_stack) from [<80200bec>] (__irq_svc+0x8c/0xbc arch/arm/kernel/entry-armv.S:228)
Exception stack(0xdf865e08 to 0xdf865e50)
5e00: e01db008 0000000d 00006cc6 00000000 e01db008 0000000d
5e20: 00000001 83f73568 83f0da88 83f73440 00000000 df865e6c df865e58 df865e58
5e40: 809c7cb4 809c7cb8 60000013 ffffffff
[<809c7c98>] (gpio_mmio_write32) from [<809c74d8>] (gpio_mmio_set+0x64/0x80 drivers/gpio/gpio-mmio.c:241)
r5:00000008 r4:83f73440
[<809c7474>] (gpio_mmio_set) from [<809b7c74>] (gpiochip_set+0x1c/0x44 drivers/gpio/gpiolib.c:2919)
r7:00000001 r6:00000000 r5:00000003 r4:8409a7bc
[<809b7c58>] (gpiochip_set) from [<809ba53c>] (gpiod_set_raw_value_commit+0x78/0x218 drivers/gpio/gpiolib.c:3662)
[<809ba4c4>] (gpiod_set_raw_value_commit) from [<809bbddc>] (gpiod_set_value_nocheck+0x44/0x58 drivers/gpio/gpiolib.c:3881)
r10:00000000 r9:00000000 r8:00000001 r7:ddde24c0 r6:838323d8 r5:00000001
r4:8409a7bc
[<809bbd98>] (gpiod_set_value_nocheck) from [<809bbe2c>] (gpiod_set_value+0x3c/0x88 drivers/gpio/gpiolib.c:3903)
[<809bbdf0>] (gpiod_set_value) from [<809cc5c8>] (gpio_led_set+0x5c/0x60 drivers/leds/leds-gpio.c:57)
r5:000000ff r4:832f7b14
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (__led_set_brightness drivers/leds/led-core.c:52 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (led_set_brightness_nopm drivers/leds/led-core.c:335 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (led_set_brightness_nosleep drivers/leds/led-core.c:369 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (led_set_brightness+0x84/0x90 drivers/leds/led-core.c:328)
r5:000000ff r4:832f7b14
[<809c9e6c>] (led_set_brightness) from [<809cba70>] (led_trigger_event drivers/leds/led-triggers.c:420 [inline])
[<809c9e6c>] (led_set_brightness) from [<809cba70>] (led_trigger_event+0x40/0x58 drivers/leds/led-triggers.c:408)
r5:000000ff r4:832f7b14
[<809cba30>] (led_trigger_event) from [<809cd0cc>] (ledtrig_cpu+0xac/0xf4 drivers/leds/trigger/ledtrig-cpu.c:86)
r7:ddde24c0 r6:00000002 r5:82b15cd8 r4:000001fd
[<809cd020>] (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 [<802b158c>] (do_idle+0x5c/0x2d8 kernel/sched/idle.c:334)
[<802b1530>] (do_idle) from [<802b1b38>] (cpu_startup_entry+0x30/0x34 kernel/sched/idle.c:430)
r10:00000000 r9:414fc0f0 r8:80003000 r7:82a7b4a4 r6:83216000 r5:00000001
r4:00000092
[<802b1b08>] (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
Sending NMI from CPU 1 to CPUs 0:
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: c2f2b01b74be Merge tag 'i3c/for-6.19' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17d2721a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4d5b48b67d177d90
dashboard link: https://syzkaller.appspot.com/bug?extid=7736397b23ea34050017
compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/98a89b9f34e4/non_bootable_disk-c2f2b01b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1d5b0c92d398/vmlinux-c2f2b01b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ab235c28e1ed/zImage-c2f2b01b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+773639...@syzkaller.appspotmail.com
watchdog: BUG: soft lockup - CPU#1 stuck for 430s! [swapper/1:0]
Modules linked in:
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 : [<81abb6f4>] lr : [<81abb6cc>] psr: 80000113
sp : df805d68 ip : df805d68 fp : df805d7c
r10: 81c05450 r9 : 83f73440 r8 : 83f0da88
r7 : 83f73568 r6 : 00000000 r5 : 00000001 r4 : 83f73568
r3 : 00006cc6 r2 : 00006cc8 r1 : 00000000 r0 : 00000001
Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 30c5387d Table: 84e31880 DAC: 00000000
Call trace: frame pointer underflow
[<81abb6b4>] (_raw_spin_lock) from [<809c74b8>] (class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline])
[<81abb6b4>] (_raw_spin_lock) from [<809c74b8>] (gpio_mmio_set+0x44/0x80 drivers/gpio/gpio-mmio.c:234)
r5:00000001 r4:83f73440
[<809c7474>] (gpio_mmio_set) from [<809b7c74>] (gpiochip_set+0x1c/0x44 drivers/gpio/gpiolib.c:2919)
r7:00000000 r6:00000000 r5:00000000 r4:8409a780
[<809b7c58>] (gpiochip_set) from [<809ba53c>] (gpiod_set_raw_value_commit+0x78/0x218 drivers/gpio/gpiolib.c:3662)
[<809ba4c4>] (gpiod_set_raw_value_commit) from [<809bbddc>] (gpiod_set_value_nocheck+0x44/0x58 drivers/gpio/gpiolib.c:3881)
r10:81c05450 r9:df805ebc r8:00000102 r7:ffffbf8d r6:0000000a r5:00000000
r4:8409a780
[<809bbd98>] (gpiod_set_value_nocheck) from [<809bbe2c>] (gpiod_set_value+0x3c/0x88 drivers/gpio/gpiolib.c:3903)
[<809bbdf0>] (gpiod_set_value) from [<809cc5c8>] (gpio_led_set+0x5c/0x60 drivers/leds/leds-gpio.c:57)
r5:832f7844 r4:832f7844
[<809cc56c>] (gpio_led_set) from [<809c9e60>] (__led_set_brightness drivers/leds/led-core.c:52 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9e60>] (led_set_brightness_nopm drivers/leds/led-core.c:335 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9e60>] (led_set_brightness_nosleep+0x38/0x44 drivers/leds/led-core.c:369)
r5:832f7844 r4:84b77dcc
[<809c9e28>] (led_set_brightness_nosleep) from [<809ccec4>] (led_heartbeat_function+0x84/0x144 drivers/leds/trigger/ledtrig-heartbeat.c:90)
[<809cce40>] (led_heartbeat_function) from [<80326f70>] (call_timer_fn+0x30/0x220 kernel/time/timer.c:1748)
r7:ffffbf8d r6:809cce40 r5:84b77dcc r4:83216000
[<80326f40>] (call_timer_fn) from [<80327424>] (expire_timers kernel/time/timer.c:1799 [inline])
[<80326f40>] (call_timer_fn) from [<80327424>] (__run_timers+0x2c4/0x3f8 kernel/time/timer.c:2373)
r9:df805ebc r8:ffffbf8d r7:00000000 r6:809cce40 r5:dddd9f00 r4:84b77dcc
[<80327160>] (__run_timers) from [<803275c0>] (__run_timer_base kernel/time/timer.c:2385 [inline])
[<80327160>] (__run_timers) from [<803275c0>] (__run_timer_base kernel/time/timer.c:2377 [inline])
[<80327160>] (__run_timers) from [<803275c0>] (run_timer_base+0x68/0x78 kernel/time/timer.c:2394)
r10:83216000 r9:82804d80 r8:00000102 r7:00000001 r6:00000082 r5:00000002
r4:dddd9f00
[<80327558>] (run_timer_base) from [<803275ec>] (run_timer_softirq+0x1c/0x34 kernel/time/timer.c:2404)
r4:82804084
[<803275d0>] (run_timer_softirq) from [<8025b55c>] (handle_softirqs+0x140/0x458 kernel/softirq.c:622)
[<8025b41c>] (handle_softirqs) from [<8025b9d0>] (__do_softirq kernel/softirq.c:656 [inline])
[<8025b41c>] (handle_softirqs) from [<8025b9d0>] (invoke_softirq kernel/softirq.c:496 [inline])
[<8025b41c>] (handle_softirqs) from [<8025b9d0>] (__irq_exit_rcu+0x110/0x1d0 kernel/softirq.c:723)
r10:00000000 r9:83216000 r8:00000000 r7:df865e08 r6:82443e68 r5:8247ef9c
r4:83216000
[<8025b8c0>] (__irq_exit_rcu) from [<8025bd48>] (irq_exit+0x10/0x18 kernel/softirq.c:751)
r5:8247ef9c r4:826c3a9c
[<8025bd38>] (irq_exit) from [<81aad164>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:295)
[<81aad0e8>] (generic_handle_arch_irq) from [<81a7d0fc>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40)
r9:83216000 r8:83f0da88 r7:df865e3c r6:ffffffff r5:60000013 r4:809c7cb8
[<81a7d0e0>] (call_with_stack) from [<80200bec>] (__irq_svc+0x8c/0xbc arch/arm/kernel/entry-armv.S:228)
Exception stack(0xdf865e08 to 0xdf865e50)
5e00: e01db008 0000000d 00006cc6 00000000 e01db008 0000000d
5e20: 00000001 83f73568 83f0da88 83f73440 00000000 df865e6c df865e58 df865e58
5e40: 809c7cb4 809c7cb8 60000013 ffffffff
[<809c7c98>] (gpio_mmio_write32) from [<809c74d8>] (gpio_mmio_set+0x64/0x80 drivers/gpio/gpio-mmio.c:241)
r5:00000008 r4:83f73440
[<809c7474>] (gpio_mmio_set) from [<809b7c74>] (gpiochip_set+0x1c/0x44 drivers/gpio/gpiolib.c:2919)
r7:00000001 r6:00000000 r5:00000003 r4:8409a7bc
[<809b7c58>] (gpiochip_set) from [<809ba53c>] (gpiod_set_raw_value_commit+0x78/0x218 drivers/gpio/gpiolib.c:3662)
[<809ba4c4>] (gpiod_set_raw_value_commit) from [<809bbddc>] (gpiod_set_value_nocheck+0x44/0x58 drivers/gpio/gpiolib.c:3881)
r10:00000000 r9:00000000 r8:00000001 r7:ddde24c0 r6:838323d8 r5:00000001
r4:8409a7bc
[<809bbd98>] (gpiod_set_value_nocheck) from [<809bbe2c>] (gpiod_set_value+0x3c/0x88 drivers/gpio/gpiolib.c:3903)
[<809bbdf0>] (gpiod_set_value) from [<809cc5c8>] (gpio_led_set+0x5c/0x60 drivers/leds/leds-gpio.c:57)
r5:000000ff r4:832f7b14
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (__led_set_brightness drivers/leds/led-core.c:52 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (led_set_brightness_nopm drivers/leds/led-core.c:335 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (led_set_brightness_nosleep drivers/leds/led-core.c:369 [inline])
[<809cc56c>] (gpio_led_set) from [<809c9ef0>] (led_set_brightness+0x84/0x90 drivers/leds/led-core.c:328)
r5:000000ff r4:832f7b14
[<809c9e6c>] (led_set_brightness) from [<809cba70>] (led_trigger_event drivers/leds/led-triggers.c:420 [inline])
[<809c9e6c>] (led_set_brightness) from [<809cba70>] (led_trigger_event+0x40/0x58 drivers/leds/led-triggers.c:408)
r5:000000ff r4:832f7b14
[<809cba30>] (led_trigger_event) from [<809cd0cc>] (ledtrig_cpu+0xac/0xf4 drivers/leds/trigger/ledtrig-cpu.c:86)
r7:ddde24c0 r6:00000002 r5:82b15cd8 r4:000001fd
[<809cd020>] (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 [<802b158c>] (do_idle+0x5c/0x2d8 kernel/sched/idle.c:334)
[<802b1530>] (do_idle) from [<802b1b38>] (cpu_startup_entry+0x30/0x34 kernel/sched/idle.c:430)
r10:00000000 r9:414fc0f0 r8:80003000 r7:82a7b4a4 r6:83216000 r5:00000001
r4:00000092
[<802b1b08>] (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
Sending NMI from CPU 1 to CPUs 0:
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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