This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 2008823
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2008823
Title:
/sys/kernel/boot_params/data leaks random data
Status in linux package in Ubuntu:
Incomplete
Bug description:
Looking at /sys/kernel/boot_params/data I see that much of the 4096 byte
buffer is old kernel data.
It really stood out as I saw parts of email contents in there.
It seems be random RAM contents from what was present before rebooting.
This was seen on Ubuntu 22.04.2 LTS with kernel 5.19.0-32-generic.
After rebooting again I
saw a fragment of yet another email in there.
A couple of ubuntu 22.10 systems show similar non-zero data, but nothing as
recognizable.
Nothing after the entries at the front of e820_table was zeroed out as it
should be.
This could leak a substantial amount of data such as encryption keys.
/sys/kernel/boot_params/data is readable by all users.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.19.0-32-generic 5.19.0-32.33~22.04.1
ProcVersionSignature: Ubuntu 5.19.0-32.33~22.04.1-generic 5.19.17
Uname: Linux 5.19.0-32-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.3
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Tue Feb 28 13:24:06 2023
InstallationDate: Installed on 2019-10-17 (1229 days ago)
InstallationMedia: Ubuntu-Server 18.04.3 LTS "Bionic Beaver" - Release amd64
(20190805)
ProcEnviron:
TERM=screen-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-signed-hwe-5.19
UpgradeStatus: Upgraded to jammy on 2022-08-13 (199 days ago)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2008823/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
