From bf4a35e9201d30b63a8d276797d6ecfaa596ccd3 Mon Sep 17 00:00:00 2001 From: Azeem Shaikh Date: Tue, 23 May 2023 02:14:51 +0000 Subject: [PATCH] leds: Replace all non-returning strlcpy with strscpy strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/20230523021451.2406362-1-azeemshaikh38@gmail.com Signed-off-by: Lee Jones --- drivers/leds/flash/leds-aat1290.c | 2 +- drivers/leds/led-class.c | 2 +- drivers/leds/leds-spi-byte.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/leds/flash/leds-aat1290.c b/drivers/leds/flash/leds-aat1290.c index 589484b..f12ecb2c 100644 --- a/drivers/leds/flash/leds-aat1290.c +++ b/drivers/leds/flash/leds-aat1290.c @@ -425,7 +425,7 @@ static void aat1290_init_v4l2_flash_config(struct aat1290_led *led, struct led_classdev *led_cdev = &led->fled_cdev.led_cdev; struct led_flash_setting *s; - strlcpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name, + strscpy(v4l2_sd_cfg->dev_name, led_cdev->dev->kobj.name, sizeof(v4l2_sd_cfg->dev_name)); s = &v4l2_sd_cfg->intensity; diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 9255bc1..6dae56b 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -409,7 +409,7 @@ static int led_classdev_next_name(const char *init_name, char *name, int ret = 0; struct device *dev; - strlcpy(name, init_name, len); + strscpy(name, init_name, len); while ((ret < len) && (dev = class_find_device_by_name(leds_class, name))) { diff --git a/drivers/leds/leds-spi-byte.c b/drivers/leds/leds-spi-byte.c index 2bc5c99..2c7ffc3 100644 --- a/drivers/leds/leds-spi-byte.c +++ b/drivers/leds/leds-spi-byte.c @@ -98,7 +98,7 @@ static int spi_byte_probe(struct spi_device *spi) return -ENOMEM; of_property_read_string(child, "label", &name); - strlcpy(led->name, name, sizeof(led->name)); + strscpy(led->name, name, sizeof(led->name)); led->spi = spi; mutex_init(&led->mutex); led->cdef = device_get_match_data(dev); -- 2.7.4