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If /sys/class/OOO node is created and destroyed during booting (kernle driver initialization fails),
systemd-udev-trigger.service fails due to race condition.
***** race condition ***********************************************************************************
1. kernel driver create /sys/class/OOO
2. systemd-udev-trigger.service execues "/usr/bin/udevadm trigger --type=devices --action=add"
3. device_enumerator_scan_devices() => enumerator_scan_devices_all() => enumerator_scan_dir("class") =>
opendir("/sys/class") and iterate all subdirs ==> enumerator_scan_dir_and_add_devices("/sys/class/OOO")
4. kernel driver fails and destroy /sys/class/OOO
5. enumerator_scan_dir_and_add_devices("/sys/class/OOO") fails in opendir("/sys/class/OOO")
6. "systemd-udev-trigger.service" fails
7. udev coldplug fails and some device units not ready
8. mount units asociated with device units fail
9. local-fs.target fails
10. enters emergency mode
********************************************************************************************************
***** status of systemd-udev-trigger.service unit ******************************************************
$ systemctl status systemd-udev-trigger.service
systemd-udev-trigger.service - udev Coldplug all Devices
Loaded: loaded (/usr/lib/systemd/system/systemd-udev-trigger.service; static; vendor preset: enabled)
Active: failed (Result: exit-code) since Thu 2020-01-02 13:16:54 KST; 22min ago
Docs: man:udev(7)
man:systemd-udevd.service(8)
Process: 2162 ExecStart=/usr/bin/udevadm trigger --type=subsystems --action=add (code=exited, status=0/SUCCESS)
Process: 2554 ExecStart=/usr/bin/udevadm trigger --type=devices --action=add (code=exited, status=1/FAILURE)
Main PID: 2554 (code=exited, status=1/FAILURE)
Jan 02 13:16:54 localhost udevadm[2554]: Failed to scan devices: No such file or directory
Jan 02 13:16:54 localhost systemd[1]: systemd-udev-trigger.service: Main process exited, code=exited, status=1/FAILURE
Jan 02 13:16:54 localhost systemd[1]: systemd-udev-trigger.service: Failed with result 'exit-code'.
Jan 02 13:16:54 localhost systemd[1]: Failed to start udev Coldplug all Devices.
*******************************************************************************************************
***** journal log with Environment=SYSTEMD_LOG_LEVEL=debug in systemd-udev-trigger.service ***********
Jan 01 21:57:20 localhost udevadm[2039]: sd-device-enumerator: Scanning /sys/bus
Jan 01 21:57:20 localhost udevadm[2522]: sd-device-enumerator: Scan all dirs
Jan 01 21:57:20 localhost udevadm[2522]: sd-device-enumerator: Scanning /sys/bus
Jan 01 21:57:21 localhost udevadm[2522]: sd-device-enumerator: Scanning /sys/class
Jan 01 21:57:21 localhost udevadm[2522]: sd-device-enumerator: Failed to scan /sys/class: No such file or directory
Jan 01 21:57:21 localhost udevadm[2522]: Failed to scan devices: No such file or directory
*******************************************************************************************************
(cherry picked from commit cfb6197bc31eb6b2631dec7bf8d7a253e7891016)
Commit 42cc2855ba2fe4c6f5d incorrectly removed the condition on sysfs in both
sys-fs-fuse-connections.mount and sys-kernel-config.mount. However there are
still needed in case modprobe of one of these modules is intentionally skipped
(due to lack of privs for example).
This patch restores the 2 conditions which should be safe for the common case,
since all conditions are only checked after all deps ordered before are
complete.
Follow-up for 42cc2855ba2fe4c6f5dc863507a1c843611350a0.
(cherry picked from commit 07ccf434e77b17b20d773ce8b2637083cd4fdafc)
As, both MOUNT_MOUNTING and MOUNT_MOUNTING_DONE are mapped to
UNIT_ACTIVATING.
Fixes#17570.
(cherry picked from commit db39a62784e8f857a67cb4a83ade28a906f79679)
These three syscalls are internally used by libc's memory allocation
logic, i.e. ultimately back malloc(). Allocating a bit of memory is so
basic, it should just be in the default set.
This fixes a couple of issues with asan/msan and the seccomp tests: when
asan/msan is used some additional, large memory allocations take place
in the background, and unless mmap/mmap2/brk are allowlisted these will
fail, aborting the test prematurely.
(cherry picked from commit 5abede3247591248718026cb8be6cd231de7728b)
udev requests to start the fs mount units when their respective module is
loaded. For that it monitors uevents of type "ADD" for the relevant fs modules.
However the uevent is sent by the kernel too early, ie before the init() of the
module is called hence before directories in /sys/fs/ are created.
This patch workarounds adds "Requires/After=modprobe@<fs-module>.service" to
the mount unit, which means that modprobe(8) will be called once the fs module
is announced to be loaded. This sounds pointless, but given that modprobe only
returns after the initialization of the module is complete, it should
workaround the issue.
As a side effect, the module will be automatically loaded if the mount unit is
started manually.
Fixes#17586.
(cherry picked from commit 42cc2855ba2fe4c6f5dc863507a1c843611350a0)
This reverts commit 9cbf1e58f9629af5c6b56777ee73dc6320306d6d.
The presence of /sys/module/%I directory can't be used to assert that the load
of a given module is complete and therefore the call to modprobe(8) can be
skipped. Indeed this directory is created before the init() function of the
module is called.
Users of modprobe@.service needs to be sure that once this service returns the
module is fully operational.
(cherry picked from commit b3e32582f67c68896b6b05893b138a975fa26454)
The configuration of networkd has a DHCPv6Client setting in its
[IPv6AcceptRA] section, which, according to the man page, can be
a boolean, or the special value "always". The man page states
that "true" is the default.
The default value is implemented in src/network/networkd-network.c
by setting field ipv6_accept_ra_start_dhcp6_client of network to
true. However, this field is not a boolean, but an enum type
IPv6AcceptRAStartDHCP6Client (src/network/networkd-ndisc.h).
Setting ipv6_accept_ra_start_dhcp6_client to true effectively
corresponds to the enum value IPV6_ACCEPT_RA_START_DHCP6_CLIENT_ALWAYS,
resulting in the DHCPv6Client setting having the default value
"always".
This patch changes the initialisation to the correct enum value
IPV6_ACCEPT_RA_START_DHCP6_CLIENT_YES.
(cherry picked from commit cabe57119f07a9f86ab281f6260bbb006b89a854)
If StartLimitIntervalSec is huge, or more specifically, set to "infinity", we need to take care about overflows.
(cherry picked from commit e2357b1c8a87b610066b8b2a59517bcfb20b832e)
":" is prettier, but meson 0.56+ doesn't like it:
src/systemd/meson.build:73: DEPRECATION: ":" is not allowed in test name "cc-sd-bus.h:c", it has been replaced with "_"
src/systemd/meson.build:73: DEPRECATION: ":" is not allowed in test name "cc-sd-bus.h:c-ansi", it has been replaced with "_"
...
Fixes#17568.
(cherry picked from commit ca121e20c42219e3bc4e5cb63dcc96cc5eae2879)
It's the mDNS top-level domain, hence don't consider it for LLMNR, ever.
Fixes: #16233
(cherry picked from commit 088648d081e9bc27f53c6471b91109569b29322f)
If we encounter an RR that has no matching signature, then we don't know
whether it was expanded from a wildcard or not. We need to accept that
and not make the NSEC test fail, just skip over the RR.
(cherry picked from commit 2f4c2db20ae02d750a6995e0afbff7231cd3a6b7)
The three answer sections can only carry up to UINT16_MAX entries, hence
put a hard upper limit on how far DnsAnswer can grow. The three count
fields in the DNS packet header are 16 bit only, hence the limit.
If code actually tries to add more than 64K RRs it will get ENOSPC with
this new checking.
And similar to DnsQuestion.
(cherry picked from commit 398c611833584632c6977e2f89746403108637c7)
[zjs: Replaces #17149.
I took half of the patch in
https://github.com/systemd/systemd/pull/17149#issuecomment-698399194,
hence I'm keeping Jonathan's authorship.
The original reasoning for 6c5496c492a8d74e54d22bf8824160cab1e63c10 was that we
enable remote-cryptsetup.target via presets, and since presets are not used for
the initrd, we need a different target. But since parts of the unit and target
tree are shared between the initramfs and the main system, we can't just create
a separate target for the initramfs. All the targets that depend on this one
would need to be split also. That condition is true for initrd-fs.target, but
not for sysinit.target.
So let's instead just uncoditionally pull in remote-cryptsetup.target in the
initramfs. It should normally be empty, so there should be no impact on boots
that don't have units in the target.
Jonathan's patch used initrd-root-fs.target, this version instead uses
initrd-root-device.target. initrd-root-device.target is ordered before
sysroot.mount, which means that the decrypted devices will be available earlier
too.]
(cherry picked from commit e921ebb57e0bc823ac167801cb5dd5f119f5d585)
We do not allow machine names with "_", so the command would fail as written.
Share the example with the systemd-nspawn page instead.
(cherry picked from commit 5fadff3352cfeb82844b6d475056bb18f2eba0dc)
This effectively reverts the commit 22fc2420b2a7220addcee33c2fa17ada44d87f9c.
The function `asynchronous_close()` confuses valgrind. Before this commit,
valgrind may report the following:
```
HEAP SUMMARY:
in use at exit: 384 bytes in 1 blocks
total heap usage: 4,787 allocs, 4,786 frees, 1,379,191 bytes allocated
384 bytes in 1 blocks are possibly lost in loss record 1 of 1
at 0x483CAE9: calloc (vg_replace_malloc.c:760)
by 0x401456A: _dl_allocate_tls (in /usr/lib64/ld-2.31.so)
by 0x4BD212E: pthread_create@@GLIBC_2.2.5 (in /usr/lib64/libpthread-2.31.so)
by 0x499B662: asynchronous_job (async.c:47)
by 0x499B7DC: asynchronous_close (async.c:102)
by 0x4CFA8B: client_initialize (sd-dhcp-client.c:696)
by 0x4CFC5E: client_stop (sd-dhcp-client.c:725)
by 0x4D4589: sd_dhcp_client_stop (sd-dhcp-client.c:2134)
by 0x493C2F: link_stop_clients (networkd-link.c:620)
by 0x4126DB: manager_free (networkd-manager.c:867)
by 0x40D193: manager_freep (networkd-manager.h:97)
by 0x40DAFC: run (networkd.c:20)
LEAK SUMMARY:
definitely lost: 0 bytes in 0 blocks
indirectly lost: 0 bytes in 0 blocks
possibly lost: 384 bytes in 1 blocks
still reachable: 0 bytes in 0 blocks
suppressed: 0 bytes in 0 blocks
For lists of detected and suppressed errors, rerun with: -s
ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
```
(cherry picked from commit 5a8775bb39526696d01d0e2ffd64e9509644fff1)
