[PATCH 0/3] Fix bugs in *_set_par() caused by user input

[Ondrej Zajicek]

On Thu, Aug 04, 2022 at 08:41:22PM +0800, Zheyu Ma wrote:
> In the function *_set_par(), the value of 'screen_size' is
> calculated by the user input. If the user provides the improper value,
> the value of 'screen_size' may larger than 'info->screen_size', which
> may cause a bug in the memset_io().

Hi

I did not saw fbdev code in years, but should not this be already checked
by *_check_var() ?

arkfb_check_var():

	...
	/* Check whether have enough memory */
	mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
	if (mem > info->screen_size)
	...

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
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"To err is human -- to blame it on a computer is even more so."