From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f80.google.com (mail-oa1-f80.google.com [209.85.160.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 057FD72606 for ; Tue, 9 Dec 2025 00:44:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765241068; cv=none; b=bR1E+aJ8tGQsxDdN77y+or2b32VUd+Vvajp3Ld89hvriA5Uz/VQuuJsIXNAXnqjh7yF5heRkhQdkDoCEcLaPohgF0MU4MxiRu2n3/KKotLdU90Ofd6l87p2hw2e0h1a76S50Nfdas+UgVSr0eU8EdjBrafZfxE/RvM8dxJzYgpo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765241068; c=relaxed/simple; bh=BHtB48KAtOWbuDQl7waRI/NEKrB9ZxEyZPK1s9A9MI8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=S6eYEox3XIgbRewhPMGhNUjujlT9fBlg4ygC8gjPCHrytwQFgx10I9JBObrNi271PLw8Q66zThlHW847iEAOhJjlT0z8O8u9q8ruNPobxsgek4znbTZyY8ROcAcXGkceaxUYjZw+k7sPAlqx9Sc8rsm1Aixzzwpgzao0si9+H+4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.160.80 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oa1-f80.google.com with SMTP id 586e51a60fabf-3f578b8136fso2136927fac.0 for ; Mon, 08 Dec 2025 16:44:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765241066; x=1765845866; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=oVYm9pWO+JyG/r/70USwrpSZzAADqXlZ7JW8GOWjD0w=; b=eL2PjoTViYgl3ObYkhC4AhJ6IV9f7MIiKK7smdHCqrjTw68DXuXy6Y+dxiITWRmPpE R9p1YpUAQO97K7qZjDmNx0AYUl55jIZW5aYV4j9s1Q5IN1GGiD1NZmomuj4SunfNeuoq R3jN+O1yMBKlSCKWjmIQslPLKOhDwYZCj3A3R7XcyoK2kUCm/mctRpBJtVTR5KpN+QQ/ MNRdT+w6DHUAuTv71TUt6YEKCfpTtlXFBhzjs0V9w9RvFFjDt/9r+1Onc55/fc8JkrTA XDdf4AZ5Ua1XYor/87PcVP6FWwyO7LZS1fvF9HOnXZsF+AFXZURWICvRNLBh1PBesFbp uM3A== X-Forwarded-Encrypted: i=1; AJvYcCVhuJMr3D2BywmJSBOOWiJmoxHiKC94PKXAeGI9/h2ULqm+HkprAMwlZHgoEwQNCoy1TTXWyi2pjq5F2QY=@vger.kernel.org X-Gm-Message-State: AOJu0Yxz/BXlxSGda4E16AQFD4q99r3IUsOTqDg6oEAm/OiRiknJQWvU 9EHAeeyPLcQpfaSnAvJHIzRyD0c0YnwZqS4k6KRvz7y6COPkPJKfeEEe+X8XSrAuVlOXUuI2Jg2 htNgQQff3gwE6750y7fymC+SWFtc1RJYzyguybBrmFfGmXBPWs6bC9Zkg5Es= X-Google-Smtp-Source: AGHT+IH0LPLHb3t0z1bkabPO88ncG7OvQHtQI3t5pKY6ZqR4p4mROZbPS/GiKSo4WVpbHwS3VLWUUj1sr+7k309VO2h9Sh0LoyNq Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:81c5:b0:659:9a49:8fd0 with SMTP id 006d021491bc7-6599a97baeemr4129570eaf.73.1765241066076; Mon, 08 Dec 2025 16:44:26 -0800 (PST) Date: Mon, 08 Dec 2025 16:44:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <693770ea.a70a0220.38f243.00b5.GAE@google.com> Subject: [syzbot] [gpio?] BUG: soft lockup in led_heartbeat_function From: syzbot To: brgl@kernel.org, linus.walleij@linaro.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" 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+7736397b23ea34050017@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 syzkaller@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