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: santi...@crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
