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Writing a byte to test10.socket is actually the root cause of issue #19154:
depending on the timing, it's possible that PID1 closes the socket before socat
(or nc, it doesn't matter which tool is actually used) tries to write that one
byte to the socket. In this case writing to the socket returns EPIPE, which
causes socat to exit(1) and subsequently make the test fail.
Since we're only interested in connecting to the socket and triggering the rate
limit of the socket, this patch removes the parts that write the single byte to
the socket, which should remove the race for good.
Since it shouldn't matter whether the test uses socat or nc, let's switch back
to nc and hence remove the sole user of socat. The exit status of nc is however
ignored because some versions might choke when the socket is closed
unexpectedly.
This commit adds a function which converts a bus message containing the
environment variables to a JSON object and uses this function to support
JSON formatted output for the "systemctl show-environment" command.
Fixes#21348
By default checks PSI on /proc/pressure, and causes a unit to be skipped
if the threshold is above the given configuration for the avg300
measurement.
Also allow to pass a custom timespan, and a particular slice unit to
check under.
Fixes#20139
In order to avoid inflating the dependency list for the core
library, use dlopen when inspecting elfs, since it's only
used in two non-core executables.
Allows to pass a portable profile when doing offline analysis of
units. Especially useful for analyzing portable images, since a
lot of the security-relevant settings in those cases come from
the profiles, but they are not shipped in the portable images.
Make oomctl a bit less likely to race with systemd-oomd receiving the
managed oom cgroup info by checking oomctl output in a loop with
timeout.
Fixes#21146
The test was changed at @bluca 's request to avoid sleeps,
but the change insufficient to avoid all races.
The kill command is now run from the script itself to avoid using
ExecStartPost
All our D-Bus services support the LogControl1 API, but homed didn't so
far. Fix that, and make use of it in the test case, to make debugging it
easier.
Linux 5.15 broke kernel API:
e70344c059
Previously setting IOPRIO_CLASS_NONE for a process would then report
IOPRIO_CLASS_NONE back. But since 5.15 it reports IOPRIO_CLASS_BE
instead. Since IOPRIO_CLASS_NONE is an alias for a special setting of
IOPRIO_CLASS_BE this makes some sense, but it's also a kernel API
breakage that our testsuite trips up on.
(I made some minimal effort to inform the kernel people about this API
breakage during the 5.15 rc phase, but noone was interested.)
Either way let's hadle this gracefully in our test suite and accept
"best-effort" too when "none" was set.
(This is only triggable if the tests are run on 5.15 with full privs)
ASan is having a hard time to get its LD_PRELOAD= shenanigans straight
with all the shells flying around. Let's make it a bit easier by using
one of the nifty systemctl's features instead.
so we can run TEST-46 under sanitizers once again.
`systemd-homed` runs fsck on home directories, which reports a memory
leak we're not interested in. Let's introduce an LSan suppression file
to get around this. Since the patterns in the suppression file are
matched using basic substring match[0], they're a bit cumbersome, but
should get the work one.
[0] https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer#suppressions
Example leaks (as reported by TEST-46):
```
systemd-homed[1333]: =================================================================
systemd-homed[1333]: ==1333==ERROR: LeakSanitizer: detected memory leaks
systemd-homed[1333]: Direct leak of 24 byte(s) in 1 object(s) allocated from:
systemd-homed[1333]: #0 0x7f0c8facccd1 in calloc (/usr/lib/clang/12.0.1/lib/linux/libclang_rt.asan-x86_64.so+0xf4cd1)
systemd-homed[1333]: #1 0x558d9494ff67 (/usr/bin/fsck+0x3f67)
systemd-homed[1333]: Direct leak of 6 byte(s) in 1 object(s) allocated from:
systemd-homed[1333]: #0 0x7f0c8fa906c1 in strdup (/usr/lib/clang/12.0.1/lib/linux/libclang_rt.asan-x86_64.so+0xb86c1)
systemd-homed[1333]: #1 0x558d949518fd (/usr/bin/fsck+0x58fd)
systemd-homed[1333]: SUMMARY: AddressSanitizer: 30 byte(s) leaked in 2 allocation(s).
systemd-homed[1337]: ==1337==WARNING: Symbolizer was blocked from starting itself!
systemd-homed[1337]: =================================================================
systemd-homed[1337]: ==1337==ERROR: LeakSanitizer: detected memory leaks
systemd-homed[1337]: Direct leak of 67584 byte(s) in 1 object(s) allocated from:
systemd-homed[1337]: #0 0x7f01edb84b19 (/usr/lib/clang/12.0.1/lib/linux/libclang_rt.asan-x86_64.so+0xf4b19)
systemd-homed[1337]: #1 0x7f01e8326829 (/usr/bin/../lib/libLLVM-12.so+0xb46829)
systemd-homed[1337]: SUMMARY: AddressSanitizer: 67584 byte(s) leaked in 1 allocation(s).
```
With the suppression file:
```
systemd-homed[1339]: -----------------------------------------------------
systemd-homed[1339]: Suppressions used:
systemd-homed[1339]: count bytes template
systemd-homed[1339]: 2 30 /bin/fsck$
systemd-homed[1339]: -----------------------------------------------------
systemd-homed[1343]: ==1343==WARNING: Symbolizer was blocked from starting itself!
systemd-homed[1343]: -----------------------------------------------------
systemd-homed[1343]: Suppressions used:
systemd-homed[1343]: count bytes template
systemd-homed[1343]: 1 67584 /lib/libLLVM
systemd-homed[1343]: -----------------------------------------------------
```
This moves the backing store to a separate tmpfs which we can nicely put
a size limit on to make sure we can test maximization sanely: if we ask
for the home dir to be grown really large it should effectively only be
grown until the size of the backing tmpfs.
(While we are at it, also set a cheaper KDF so that we don't waste CI
cycles for password hashing that aren#t secure anyway.)
