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These system calls clearly fall in the @ipc category, hence should be listed
there, simply to avoid confusion and surprise by the user.
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The system call is already part in @default hence implicitly allowed anyway.
Also, if it is actually blocked then systemd couldn't execute the service in
question anymore, since the application of seccomp is immediately followed by
it.
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Timing and sleep are so basic operations, it makes very little sense to ever
block them, hence don't.
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Switch drivers uses phys_port_name attribute to pass front panel port
name to user. Use it to generate netdev names.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
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"Secondary arch" table for mips is entirely speculative…
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Lustre is also a remote file system that wants the network to be up before it is mounted.
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This introduces a new option, `tcrypt-veracrypt`, that sets the
corresponding VeraCrypt flag in the flags passed to cryptsetup.
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A pendant for #4481.
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systemd-escape manpage improvements
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The first example wasn't phrased with "To ..." as the other three are,
and the last example was lacking the colon.
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The option does more than the documentation gave it credit for.
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Not sure since when this is the default behavior, but my local tree is full
of such files. Let's ignore them for clarity.
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seccomp: also block shmat(..., SHM_EXEC) for MemoryDenyWriteExecute
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Document NoNewPrivileges default value
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Suggested by @keszybz in #4488.
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core: improve mount namespace and working directory setup
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detect-virt: add --private-users switch to check if a userns is active; add Condition=private-users
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This makes applying groups after applying the working directory, this
may allow some flexibility but at same it is not a big deal since we
don't execute or do anything between applying working directory and
droping groups.
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Improve apply_working_directory() and lets get the current working directory
inside of it.
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We updated 'fn' but checked 'v' instead.
From 698c5a17
Spotted with PVS
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Fix some formatting details in the merge.
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The mount fails, even though CAP_SYS_ADMIN is granted.
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Rewrite the function to be slightly simpler. In particular, if a specific
match is found (like ConditionVirtualization=yes), simply return an answer
immediately, instead of relying that "yes" will not be matched by any of
the virtualization names below.
No functional change.
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This can be useful to silence warnings about units which fail in userns
container.
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Various things don't work when we're running in a user namespace, but it's
pretty hard to reliably detect if that is true.
A function is added which looks at /proc/self/uid_map and returns false
if the default "0 0 UINT32_MAX" is found, and true if it finds anything else.
This misses the case where an 1:1 mapping with the full range was used, but
I don't know how to distinguish this case.
'systemd-detect-virt --private-users' is very similar to
'systemd-detect-virt --chroot', but we check for a user namespace instead.
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Invalid IP addresses would be passed through as-is:
$ networkctl status wlp3s0:
● 2: wlp3s0
Link File: /usr/lib/systemd/network/99-default.link
Network File: /etc/systemd/network/wlp3s0.network
Type: wlan
State: routable (configured)
Path: pci-0000:03:00.0
Driver: iwlwifi
Vendor: Intel Corporation
Model: Centrino Advanced-N 6205 [Taylor Peak] (Centrino Advanced-N 6205 AGN)
HW Address: XXXXXXXXXX (Intel Corporate)
Address: 192.168.2.103
XXXXXXXXXXX
Gateway: 192.168.2.1 (Arcadyan Technology Corporation)
DNS: 127.0.0.5553
Instead verify that DNS= has a valid list of addresses when parsing configuration.
Fixes #4462.
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To more correctly reflect current behaviour as well as to provide
a few more details.
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shmat(..., SHM_EXEC) can be used to create writable and executable
memory, so let's block it when MemoryDenyWriteExecute is set.
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Check if values filled up by KD_FONT_OP_GET ioctl make sense -
dummy driver for example doesn't implement required functionality
at all.
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... and that that content might be outdated.
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Fixes:
$ ls -l /bin/sh
lrwxrwxrwx 1 root root 4 Feb 17 2016 /bin/sh -> dash
$ ./autogen.sh c
./autogen.sh: 22: ./autogen.sh: [[: not found
...
checking whether make supports nested variables... (cached) yes
checking build system type... Invalid configuration `c': machine `c' not
recognized
configure: error: /bin/bash build-aux/config.sub c failed
this is a follow-up for a5e739a570081231
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two minor systemctl memleak fixes
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In case of running test-execute on systems with systemd < v232, several
tests like privatedevices or protectkernelmodules fail because
/run/systemd/inaccessible/ doesn't exist. In these cases, we should skip
tests to avoid unnecessary errors.
See also https://github.com/systemd/systemd/pull/4243#issuecomment-253665566
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(Also, let's not use the binary |= operator on "bool" variables).
Fix-up for 93a0884126146361ca078ec627da2cf766205a1c.
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various nss module/resolved fixes
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Fixes #4329.
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Various seccomp fixes and NEWS update.
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Properly synthesize -.slice and init.scope
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