ACK: [SRU F/OEM-5.14/J/OEM-5.17 PATCH 0/3] CVE-2021-33655
stefan.bader at canonical.com
Mon Aug 22 08:54:01 UTC 2022
On 05.08.22 12:09, Cengiz Can wrote:
> When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,
> kernel will write memory out of bounds.
> 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(-)
Acked-by: Stefan Bader <stefan.bader at canonical.com>
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