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Even with the new keyed hash table journal feature: if an attacker
manages to get access to the journal file id it could synthesize records
that result in hash collisions. Let's rotate automatically when we
notice that, so that a new journal file ID is generated, our performance
is restored and the attacker has to guess a new file ID before being
able to trigger the issue again.
That said, untrusted peers should never get access to journal files in
the first case...
This adds a new (incompatible) feature to journal files: if enabled the
hash function used for the hash tables is no longer jenkins hash with a
zero key, but siphash keyed by the file uuid that is included in the
file header anyway. This should make our hash tables more robust against
collision attacks, as long as the attacker has no read access to the
journal files. We switch from jenkins to siphash simply because it's
more well-known and we standardize for the rest of our codebase onto it.
This is hardening in order to make collision attacks harder for clients
that can forge log messages but have no read access to the logs. It has
no effect on clients that have read access.
Let's prefix this with "jenkins_" since it wraps the jenkins hash. We
want to add support for other hash functions to journald soon, hence
better be clear with what this is. In particular as all other symbols
defined by lookup3.h actually are prefixed "jenkins_".
Let's clean this up a bit, following our usual nomenclature to name
return parameters ret-xyz.
This is mostly a bit of renaming, but there's also some minor other
changes: if we return a pointer to a mmap'ed object plus its offset, in
almost all cases we are happy if either parameter is NULL in case the
caller is not interested in it. Let's fix the remaining case to do this
too, to minimize surprises.
The object flags field is a bitmask, hence don't sloppily define
_OBJECT_COMPRESSED_MAX as one mor than the previous flag. That worked OK
as long as we only had two flags, but will fall apart as soon as we have
three. Let's fix this.
(It's kinda sloppy how the string table is built here, as it will be
quite sparse as soon as we have more enum entries, but let's keep it for
now.)
Since cryptsetup 2.3.0 a new API to verify dm-verity volumes by a
pkcs7 signature, with the public key in the kernel keyring,
is available. Use it if libcryptsetup supports it.
Since cryptsetup 2.3.0 a new API to verify dm-verity volumes by a
pkcs7 signature, with the public key in the kernel keyring,
is available. Use it if libcryptsetup supports it in the
veritysetup helper binary.
https://tools.ietf.org/html/draft-knodel-terminology-02https://lwn.net/Articles/823224/
This gets rid of most but not occasions of these loaded terms:
1. scsi_id and friends are something that is supposed to be removed from
our tree (see #7594)
2. The test suite defines an API used by the ubuntu CI. We can remove
this too later, but this needs to be done in sync with the ubuntu CI.
3. In some cases the terms are part of APIs we call or where we expose
concepts the kernel names the way it names them. (In particular all
remaining uses of the word "slave" in our codebase are like this,
it's used by the POSIX PTY layer, by the network subsystem, the mount
API and the block device subsystem). Getting rid of the term in these
contexts would mean doing some major fixes of the kernel ABI first.
Regarding the replacements: when whitelist/blacklist is used as noun we
replace with with allow list/deny list, and when used as verb with
allow-list/deny-list.
This fixes commit db2b8d2e28 that
rectified parsing empty values but broke parsing explicit infinity.
Intended parsing semantics will be captured in a testcase in a follow up
commit.
Ref: #16248
It's just a follow-up to https://github.com/systemd/systemd/pull/16266.
Currently the Coverity stage is failing with
```
Starting container systemd-fedora-latest
2db425228e1addbce607c7e47e492a0faef2c2c4e85701c6c239a50de95944eb
Error: No such container: bash
The command "$CI_MANAGERS/fedora.sh SETUP" failed and exited with 1 during .
Your build has been stopped.
```
https://travis-ci.org/github/systemd/systemd/builds/701798193
Looks like DOCKER_EXEC got lost somewhere along the way, which, in
turn, caused the "coverity" job to fail with
```
$ $DOCKER_EXEC meson cov-build -Dman=false
Command 'meson' not found, but can be installed with:
apt install meson
Please ask your administrator.
```
https://travis-ci.org/github/systemd/systemd/builds/701705788
Presently, CLI utilities such as systemctl will check whether they have a tty
attached or not to decide whether to parse /proc/cmdline or EFI variable
SystemdOptions looking for systemd.log_* entries.
But this check will be misleading if these tools are being launched by a
daemon, such as a monitoring daemon or automation service that runs in
background.
Make log handling of CLI tools uniform by never checking /proc/cmdline or EFI
variables to determine the logging level.
Furthermore, introduce a new log_setup_cli() shortcut to set up common options
used by most command-line utilities.
Also use double space before the tracking args at the end. Without
the comma this looks ugly, but it's a bit better with the double space.
At least it doesn't look like a variable with a type.
I'm not sure if I understand the code correctly, but it seems that if
storig in the second set failed, we'd return with the first set having
no reference on the link object, and the link object could be freed in the
future, leaving the set with a dangling reference.
On error, we'd just free the object, and not close the fd.
While at it, let's use set_ensure_consume() to make sure we don't leak
the object if it was already in the set. I'm not sure if that condition
can be achieved.
_cleanup_set_free_ is enough for unit_files, because unit_files is
allocated in set_put_strdup(), which uses string_hash_ops_free.
This fixes a leak if marker was already present in the table.
