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add missing syscalls for workers #2212

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merged 3 commits into from
Mar 28, 2024
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tugytur
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@tugytur tugytur commented Nov 7, 2023

Description

Since the binary split additional syscalls are getting blocked in relation to the workers.

With the hardened systemd file it shows the following warning:

Cannot fully enable landlock, a Linux kernel security feature. Running validation of malicious PVF code has a higher risk of compromising this machine. Consider upgrading the kernel version for maximum security. status=Ok(NotEnforced) abi=1

For it to work we need to allow additionally:

  • mount
  • umount2
  • pivot_root

and set RestrictNamespaces=false

Added new line SystemCallFilter=pivot_root because otherwise it would get blocked by ~@\privileged

@s0me0ne-unkn0wn
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This one could partially resolve #2728, it's a shame it got lost. Let's merge it.

@s0me0ne-unkn0wn s0me0ne-unkn0wn added R0-silent Changes should not be mentioned in any release notes T0-node This PR/Issue is related to the topic “node”. labels Mar 28, 2024
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@lovelaced could you please have a look?

@s0me0ne-unkn0wn s0me0ne-unkn0wn removed the request for review from AndreiEres March 28, 2024 13:32
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Looks sane to me, I would definitely prefer users do this rather than blanket-disable all systemd protections as was done in the other issue.

@paritytech paritytech deleted a comment from command-bot bot Mar 28, 2024
@bkchr bkchr enabled auto-merge March 28, 2024 13:42
@bkchr bkchr added this pull request to the merge queue Mar 28, 2024
Merged via the queue into paritytech:master with commit c106dbd Mar 28, 2024
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pgherveou pushed a commit that referenced this pull request Apr 2, 2024
# Description

Since the binary split additional syscalls are getting blocked in
relation to the workers.

With the hardened systemd file it shows the following warning:

```
Cannot fully enable landlock, a Linux kernel security feature. Running validation of malicious PVF code has a higher risk of compromising this machine. Consider upgrading the kernel version for maximum security. status=Ok(NotEnforced) abi=1
```

For it to work we need to allow additionally:
- mount
- umount2
- pivot_root

and set `RestrictNamespaces=false`

Added new line `SystemCallFilter=pivot_root` because otherwise it would
get blocked by ~\@\privileged

Co-authored-by: s0me0ne-unkn0wn <48632512+s0me0ne-unkn0wn@users.noreply.github.com>
Co-authored-by: Bastian Köcher <git@kchr.de>
dharjeezy pushed a commit to dharjeezy/polkadot-sdk that referenced this pull request Apr 9, 2024
# Description

Since the binary split additional syscalls are getting blocked in
relation to the workers.

With the hardened systemd file it shows the following warning:

```
Cannot fully enable landlock, a Linux kernel security feature. Running validation of malicious PVF code has a higher risk of compromising this machine. Consider upgrading the kernel version for maximum security. status=Ok(NotEnforced) abi=1
```

For it to work we need to allow additionally:
- mount
- umount2
- pivot_root

and set `RestrictNamespaces=false`

Added new line `SystemCallFilter=pivot_root` because otherwise it would
get blocked by ~\@\privileged

Co-authored-by: s0me0ne-unkn0wn <48632512+s0me0ne-unkn0wn@users.noreply.github.com>
Co-authored-by: Bastian Köcher <git@kchr.de>
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4 participants