[patch] fbdev: fix snprintf() limit in show_bl_curve()
From: Dan Carpenter <hidden>
Date: 2015-08-21 08:53:02
Also in:
kernel-janitors
Subsystem:
framebuffer core, framebuffer layer, the rest · Maintainers:
Simona Vetter, Helge Deller, Linus Torvalds
The limit should be "PAGE_SIZE - len" instead of PAGE_SIZE. Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index 60c3f0a..827098d 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c@@ -485,7 +485,7 @@ static ssize_t show_bl_curve(struct device *device, mutex_lock(&fb_info->bl_curve_mutex); for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8) - len += snprintf(&buf[len], PAGE_SIZE, "%8ph\n", + len += snprintf(&buf[len], PAGE_SIZE - len, "%8ph\n", fb_info->bl_curve + i); mutex_unlock(&fb_info->bl_curve_mutex);