Re: [PATCH stable 4.14 v2 2/3] fbcon: Prevent that screen size is smaller than font size

["chenjun (AM)" <chenjun102@huawei.com>]

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@gmx.de>
>>
>> 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@gmx.de>
>> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
>> Link: https://lore.kernel.org/all/20220706150253.2186-1-deller@gmx.de/
>> [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