在 2022/8/4 19:50, Greg KH 写道: > 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? Em..I misunderstood the meaning "sudip". I just mean I made some contextual adjustments. > And the Link: line wasn't in the original commit, where did that come > from? > The mainline commit appears to be from this link. Should I remove the link? > thanks, > > greg k-h > -- Regards Chen Jun
