Commit 61ac4b86 authored Mar 15, 2023 by Wei Chen Committed by Helge Deller Mar 16, 2023

fbdev: lxfb: Fix potential divide by zero



var->pixclock can be assigned to zero by user. Without proper
check, divide by zero would occur in lx_set_clock.

Error out if var->pixclock is zero.

Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>

parent d8236854

drivers/video/fbdev/geode/lxfb_core.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -235,6 +235,9 @@ static void get_modedb(struct fb_videomode *modedb, unsigned int size)

		static int lxfb_check_var(struct fb_var_screeninfo var, struct fb_info info)
		{
		if (!var->pixclock)
		return -EINVAL;

		if (var->xres > 1920 \|\| var->yres > 1440)
		return -EINVAL;