[SRU][J/F/B][PATCH 0/1] Fix CVE-2022-3061 (fbdev 'pixclock' divide-by-zero)

[John Cabaj]

Disregard, this was meant to go to my own email as a test.

On Fri, Oct 14, 2022 at 10:07 AM John Cabaj <john.cabaj at canonical.com>
wrote:

> CVE-2022-3061
>
> [Impact]
>
> * Intel 740fb graphics card driver could encounter a divide-by-zero error
> if the value of pixclock is zero. The ability of a userspace program to
> pass any values to ioctl() further exposes this issue. Impacts Jammy,
> Focal, and Bionic.
>
> [Fix]
>
> * A simple check to ensure pixclock is non-zero was added to
> i740fb_check_var.
>
> [Test Plan]
>
> * Install linux-5.15 on jammy system and boot test
>
> [Where problems could occur]
>
> * If there is some other downstream reliance on a pixclock value of zero
> serving as a flag
>
> ZheyuMa (1):
>   video: fbdev: i740fb: Error out if 'pixclock' equals zero
>
>  drivers/video/fbdev/i740fb.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> --
> 2.34.1
>
>
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