APPLIED [OEM-5.17] Re: [SRU F/OEM-5.14/J/OEM-5.17 PATCH 0/3] CVE-2021-33655

[Stefan Bader]

On 22.08.22 10:55, Timo Aaltonen wrote:
> Cengiz Can kirjoitti 5.8.2022 klo 13.09:
>> [Impact]
>> When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,
>> kernel will write memory out of bounds.
>>
>> [Fix]
>> Fixes were cherry-picked from closest stable trees and upstream.
>>
>> MITRE entry points to a merge commit that contain six patches. Three of
>> those were considered relevant.
>>
>> [Test case]
>> Compile and boot tested on KVM only.
>>
>> [Potential regression]
>> Due to self contained changes on >5.4, seems minimal.
>>
>> Helge Deller (3):
>>    fbcon: Disallow setting font bigger than screen size
>>    fbcon: Prevent that screen size is smaller than font size
>>    fbmem: Check virtual screen sizes in fb_set_var()
>>
>>   drivers/video/fbdev/core/fbcon.c | 33 ++++++++++++++++++++++++++++++++
>>   drivers/video/fbdev/core/fbmem.c | 14 +++++++++++++-
>>   include/linux/fbcon.h            |  4 ++++
>>   3 files changed, 50 insertions(+), 1 deletion(-)
>>
> 
> applied to oem-5.17, thanks
> 

I went ahead and also put it into hwe-5.17 (should in theory just silently go 
away when rebasing, but just as a warning).

-Stefan
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