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The TODO says we were supposed to do that in 2019–2020 (if I interpreted the
enigmatic notation correctly). The comment in hwdb said:
> DO NOT USE THIS PROPERTY. This property is kept for backwards
> compatibility. The only known consumer, libinput, stopped reading this
> property in version 1.9.0. No new entries for this property should be
> added.
… and we're currently on libinput-1.23.0.
Most likely there are no users, and even if they are, they'll just get a
slightly misbehaving pointingstick, which shouldn't be too bad.
The article "a" goes before consonant sounds and "an" goes before vowel
sounds. This commit changes an to a for UKI, UDP, UTF-8, URL, UUID, U-Label, UI
and USB, since they start with the sound /ˌjuː/.
Before this commit, we only accept the case when LoaderDevicePartUUID
points to the ESP, while XBOOTLDR is mounted unconditionally.
After this commit, we check if LoaderDevicePartUUID points to either
ESP or XBOOTLDR. If it does, mount both, else nothing gets mounted.
This takes heavy inspiration from @zx2c4 (Jason A. Donenfeld)'s
PR #25531 but changes it considerably, but always going by fd instead of
paths, and only warning about the side file itself and the ESP mount
point, nothing else. This shuld be more than enough and should not be
brittle against concurrent path modifications.
Replaces: #25531
The file descriptors we keep in the fdstore might be basically anything,
let's clean it up with our asynchronous closing feature, to not
deadlock on close().
(Let's also do the same for stdin/stdout/stderr fds, since they might
point to network services these days.)
Adds a new image type called IMAGE_CONFEXT which is similar to IMAGE_SYSEXT but works
for the /etc/ directory instead of /usr/ and /opt/. This commit also adds the ability to
parse the release file that is present with the confext image in /etc/confext-release.d/
directory.
Prevent attackers from spoofing the tpmKey portion of the AuthSession by
adding a trusted key to the LUKS header metadata. Also, use a persistent
object rather than a transient object.
This provides the following benifits:
1. No way to MITM the tpmKey portion of the session, see [1] for
details.
2. Strengthens the encrypted sessions, note that the bindKey could be
dropped now.
3. Speed, once it's created we just use it.
4. Owner Auth is needed to call create primary, so using the SRK
creates a scratch space for normal users.
This is a "first to set" model, in where the first person to set the key
in the LUKS header wins. Thus, setup should be done in a known good
state. If an SRK, which is a primary key at a special persistent
address, is found, it will use whatever is there. If not, it creates an
SRK. The SRK follows the convetions used through the tpm2-software
organization code on GitHub [2], however, a split has occured between
Windows and Linux with respect to SRK templates. The Linux SRK is
generated with the unique field size set to 0, in Windows, it properly
sets the size to key size in bytes and the unique data to all 0's of that
size. Note the proper templates for SRKs is covered in spec [3].
However, the most important thing, is that both SRKs are passwordless,
and thus they should be interchangable. If Windows is the first to make
the SRK, systemd will gladly accept it and vice-versa.
1. Without the bindKey being utilized, an attacker was able to intercept
this and fake a key, thus being able to decrypt and encrypt traffic as
needed. Introduction of the bindKey strengthened this, but allows for
the attacker to brute force AES128CFB using pin guesses. Introduction of
the salt increases the difficulty of this attack as well as DA attacks
on the TPM objects itself.
2. https://github.com/tpm2-software
3. https://trustedcomputinggroup.org/wp-content/uploads/TCG-TPM-v2.0-Provisioning-Guidance-Published-v1r1.pdfFixes: #20668Fixes: #22637
Signed-off-by: William Roberts <william.c.roberts@intel.com>
I doubt we should bother. Swap always makes sense, and having a swap
partition for hibernate only without using it all the time just makes
the system worse overall.
Chasing symlinks is a core function that's used in a lot of places
so it deservers a less verbose names so let's rename it to chase()
and chaseat().
We also slightly change the pattern used for the chaseat() helpers
so we get chase_and_openat() and similar.
