On Wed, Jul 6, 2022 at 5:02 PM Helge Deller <[email protected]> wrote: > We need to prevent that users configure a screen size which is smaller than > the > currently selected font size. Otherwise rendering chars on the screen will > access memory outside the graphics memory region. > > This patch adds a new function fbcon_modechange_possible() which > implements this check and which later may be extended with other checks > if necessary. The new function is called from the FBIOPUT_VSCREENINFO > ioctl handler in fbmem.c, which will return -EINVAL if userspace asked > for a too small screen size. > > Signed-off-by: Helge Deller <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected] In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
