On Thu, Aug 04, 2022 at 11:15:38AM +0000, Chen Jun wrote: > From: Helge Deller <deller@xxxxxx> > > commit e64242caef18b4a5840b0e7a9bff37abd4f4f933 upstream > > 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 <deller@xxxxxx> > Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> > Link: https://lore.kernel.org/all/20220706150253.2186-1-deller@xxxxxx/ > [sudip: adjust context] Who is "sudip" here? And the Link: line wasn't in the original commit, where did that come from? thanks, greg k-h
