From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/leds/trigger/ledtrig-disk.c | 40 +++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 drivers/leds/trigger/ledtrig-disk.c (limited to 'drivers/leds/trigger/ledtrig-disk.c') diff --git a/drivers/leds/trigger/ledtrig-disk.c b/drivers/leds/trigger/ledtrig-disk.c new file mode 100644 index 000000000..e9b87ee94 --- /dev/null +++ b/drivers/leds/trigger/ledtrig-disk.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * LED Disk Activity Trigger + * + * Copyright 2006 Openedhand Ltd. + * + * Author: Richard Purdie + */ + +#include +#include +#include + +#define BLINK_DELAY 30 + +DEFINE_LED_TRIGGER(ledtrig_disk); +DEFINE_LED_TRIGGER(ledtrig_disk_read); +DEFINE_LED_TRIGGER(ledtrig_disk_write); + +void ledtrig_disk_activity(bool write) +{ + led_trigger_blink_oneshot(ledtrig_disk, BLINK_DELAY, BLINK_DELAY, 0); + if (write) + led_trigger_blink_oneshot(ledtrig_disk_write, + BLINK_DELAY, BLINK_DELAY, 0); + else + led_trigger_blink_oneshot(ledtrig_disk_read, + BLINK_DELAY, BLINK_DELAY, 0); +} +EXPORT_SYMBOL(ledtrig_disk_activity); + +static int __init ledtrig_disk_init(void) +{ + led_trigger_register_simple("disk-activity", &ledtrig_disk); + led_trigger_register_simple("disk-read", &ledtrig_disk_read); + led_trigger_register_simple("disk-write", &ledtrig_disk_write); + + return 0; +} +device_initcall(ledtrig_disk_init); -- cgit v1.3.1