Re: [PATCH] vgacon, x86/boot: Prevent faulty bootparams.screeninfo from causing harm

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sun, Aug 27, 2017 at 03:56:46PM +0200, Jan H. Schönherr wrote:
> If a zero for the number of colums or rows manages to slip through,
> gotoxy() will underflow vc->vc_pos, causing the next action on the
> referenced memory to end with a page fault.
> 
> Make the check in vgacon more pessimistic to prevent that. Also change
> a similar check in the x86 boot code with a similar problem.
> 
> Signed-off-by: Jan H. Schönherr <jschoenh@xxxxxxxxx>
> ---
> Let me know, if I should split this into two patches.
> 
>  arch/x86/boot/compressed/misc.c | 3 +--
>  drivers/video/console/vgacon.c  | 5 ++---
>  2 files changed, 3 insertions(+), 5 deletions(-)

Why send this patch to me?

And yes, of course you have to split this up, these two files have
nothing to do with each other...

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Video for Linux]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Tourism]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux