fsck: copy out device argument from argv[] before forking
We nowadays rename our child processes, hence argv[] will be clobbered,
let's hence copy the device path to dynamic memory before forking.
This is fall-out from 60ffa37a65a96c3af857a3dfc4a6fd47b20cc90e since we
now a lot more often end up overriding the argv[] buffer than before,
simple because we know what to override.
These kind of bugs kinda suck. THere are only two options here: stop
overriding argv[] for all cases (or just these cases) or explicitly
copying out everything we need in child processes before forking. With
this patch I opt for the latter, though I am not 100% convinced this is
a great solution. Just a better solution than everything else, i.e.
allowing argv[] to remain out of sync with what others see.
Apparently by the C standard "int" bitfields can have any signedness
(unlike non-bitfield declarations which are "signed" if the signedness
is not specified).
Let's fix the LGTM warning about this hence and be explicit that we mean
"signed" here.
Michal Sekletar [Wed, 27 Mar 2019 08:27:21 +0000 (09:27 +0100)]
cryptsetup-generator: set high OOM score for systemd-cryptsetup instances
With new LUKS2 header format it is possible to use Argon2 key derivation
function. This function is "memory-hard" hence keyslot unlocking can
potentially use a lot of RAM as this increases resistance to massively
parallel GPU based password cracking.
However, when multiple systemd-cryptsetup binaries run at the same
time it is very likely that system using Argon2 (e.g. Fedora 30)
will encounter memory-pressure during early boot, following OOM killing
spree.
This patch aims to lower the damage done by OOM killer and sets OOMScore
for systemd-cryptsetup units to 500. Hopefully OOM killer will then
shoot us down and leave rest of the system services alone.
meson: disable warnings about unused variables for NDEBUG builds
With assertions disabled, we'd get a bunch of warnings that really bring no
value. With this change, a default meson build with -Db_ndebug=true generates
no warnings.
test-terminal-util: fix sigsegv when compiled without asserts
I couldn't figure out what is going on here, because LTO inlines everything and
then the backtrace reported a different spot. But when compiled with NDEBUG but
no LTO, it's fairly obvious ;)
When compiled with -DNDEBUG, we get warnings about set-but-unused variables.
In general, it's not something we care about, but since removing those
variables arguably makes the code nicer, let's just to it in this case.
Let's be helpful to static analyzers which care about whether we
knowingly ignore return values. We do in these cases, since they are
usually part of error paths.
journalctl: voidify mkdir_p() call and unify two similar code paths
Let's unify the two similar code paths to watch /run/systemd/journal.
The code in manager.c is similar, but it uses mkdir_p_label(), and unifying
that would be too much trouble, so let's just adjust the error messages to
be the same.
test-fileio: do not use variable before checking return value
Coverity is unhappy because we use "line" in the assert that checks
the return value. It doesn't matter much, but let's clean this up.
Also, let's not assume that /proc/cmdline contains anything.
test-execute: skip flaky test when we can't unshare namespaces
When running in Fedora "mock", / is a tmpfs and /home is not mounted. The test
assumes that /home will be a tmpfs only and only if we can unshare. Obviously,
this does not hold in this case, because unsharing is not possible, but /home
is still a tmpfs. Let's just skip the test, since it's fully legitimate to
mount either or both of / and /home as tmpfs.
core: drop suid/sgid bit of files/dirs when doing recursive chown
This adds some extra paranoia: when we recursively chown a directory for
use with DynamicUser=1 services we'll now drop suid/sgid from all files
we chown().
Of course, such files should not exist in the first place, and noone
should get access to those dirs who isn't root anyway, but let's better
be safe than sorry, and drop everything we come across.
namespace: when DynamicUser=1 is set, mount StateDirectory= bind mounts "nosuid"
Add even more suid/sgid protection to DynamicUser= envionments: the
state directories we bind mount from the host will now have the nosuid
flag set, to disable the effect of nosuid on them.
nspawn: mount mqueue with nodev,noexec,nosuid, too
The host mounts it like that, nspawn hence should do too.
Moreover, mount the file system after doing CLONEW_NEWIPC so that it
actually reflects the right mqueues. Finally, mount it wthout
considering it fatal, since POSIX mqueue support is little used and it
should be fine not to support it in the kernel.
mount-util: beef up bind_remount_recursive() to be able to toggle more than MS_RDONLY
The function is otherwise generic enough to toggle other bind mount
flags beyond MS_RDONLY (for example: MS_NOSUID or MS_NODEV), hence let's
beef it up slightly to support that too.
Previously both run() and run_container() would free 'fds'. Let's fix
that, and let run() free it but make run_container() already remove all
fds from it, because that's what we actually want to do.
Commit d85515edcf9700dc068201ab9f7103f04f3b25b2 changed logic how reboot is
executed. That commit changed behavior to use emergency action reboot code path
to perform the reboot.
This inadvertently broke rebooting with argument:
$ systemctl reboot custom-reason
Restore original behavior so that if reboot service unit similar to
systemd-reboot.service is executed it is possible to override reboot reason
with "systemctl reboot ARG".
When "systemctl reboot ARG" is executed ARG is placed in file
/run/systemd/reboot-param and reboot is issued using logind's Reboot
dbus-service.
If RebootArgument is specified in systemd-reboot.service it takes precedence
over what systemctl sets.
projects / thirdparty / systemd.git / log
