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[GH-ISSUE #1971] "namespace support is disabled" in 0.9.54 #1326

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opened 2026-05-05 07:52:01 -06:00 by gitea-mirror · 4 comments

gitea-mirror commented

2026-05-05 07:52:01 -06:00

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Originally created by @Futureknows on GitHub (May 31, 2018).
Original GitHub issue: https://github.com/netblue30/firejail/issues/1971

Running firejail --version I noticed

0.9.52 reports user "namespace support is enabled"
0.9.54 reports user "namespace support is disabled"

Firetools confirms namespace is disable in each firejail running 0.9.54

OS Fedora 27 and Mint reproducible.

Originally created by @Futureknows on GitHub (May 31, 2018). Original GitHub issue: https://github.com/netblue30/firejail/issues/1971 Running `firejail --version` I noticed 0.9.52 reports user "namespace support is enabled" 0.9.54 reports user "namespace support is disabled" Firetools confirms namespace is disable in each firejail running 0.9.54 OS Fedora 27 and Mint reproducible.

gitea-mirror

2026-05-05 07:52:01 -06:00

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gitea-mirror commented

2026-05-05 07:52:06 -06:00

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@reinerh commented on GitHub (May 31, 2018):

From where did you get the package? Is it from your distribution or a deb/rpm from firejail?

Also I just see that in platform/rpm/firejail.spec (for building the rpms) userns support is explicitely disabled. Though I don't know why...

@reinerh commented on GitHub (May 31, 2018): From where did you get the package? Is it from your distribution or a deb/rpm from firejail? Also I just see that in platform/rpm/firejail.spec (for building the rpms) userns support is explicitely disabled. Though I don't know why...

gitea-mirror commented

2026-05-05 07:52:07 -06:00

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@SkewedZeppelin commented on GitHub (May 31, 2018):

@reinerh
It was disabled here in early 2016.

I tested with it enabled:

under Fedora 28 it works fine
under CentOS 7 the message is printed "Warning: cannot create a new user namespace, going forward without it...", and then continues just fine

If its just a minor warning under some systems and there are benefits to having it enabled I see no reason to not enable it again.

@SkewedZeppelin commented on GitHub (May 31, 2018): @reinerh It was disabled [here](https://github.com/netblue30/firejail/commit/1bb8fddae5c92dde1ba750f50e80b306dd9cc6a0#diff-c95419737801a34f6c1c0dc5213ff1a9R22) in early 2016. I tested with it enabled: - under Fedora 28 it works fine - under CentOS 7 the message is printed "Warning: cannot create a new user namespace, going forward without it...", and then continues just fine If its just a minor warning under some systems and there are benefits to having it enabled I see no reason to not enable it again.

gitea-mirror commented

2026-05-05 07:52:09 -06:00

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@netblue30 commented on GitHub (Jun 4, 2018):

CentOS 7 has a kernel 3.10 with a totally broken user namespace, so I disabled it when building rpm packages to be posted on SourceForge as part of the release. It should work fine on newer kernels on Fedora, but you have to compile it yourself.

@netblue30 commented on GitHub (Jun 4, 2018): CentOS 7 has a kernel 3.10 with a totally broken user namespace, so I disabled it when building rpm packages to be posted on SourceForge as part of the release. It should work fine on newer kernels on Fedora, but you have to compile it yourself.

gitea-mirror commented

2026-05-05 07:52:10 -06:00

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@Futureknows commented on GitHub (Jun 6, 2018):

Thanks! Can confirm fresh compiled 0.9.55 enables namespace support in Fedora and Ubuntu.

@Futureknows commented on GitHub (Jun 6, 2018): Thanks! Can confirm fresh compiled 0.9.55 enables namespace support in Fedora and Ubuntu.

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Reference: github-starred/firejail#1326

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