Hello-world snap gives "cannot bind-mount the mount namespace file" on Debian testing

snapd
1

I am getting similar symptoms to those described in an older forum post, but on a newer kernel and snapd.

Bear in mind this is my first ever experience with snapd and snaps in general, so please excuse any misunderstandings on my part.

$ /snap/bin/hello-world
cannot bind-mount the mount namespace file /proc/4674/ns/mnt -> hello-world.mnt: Permission denied
support process for mount namespace capture exited abnormally

This is running on Debian testing, with snapd 2.27.6-2. Kernel is 4.14.

Please let me know what further diagnostic info is needed, thanks in advance for assistance.

2

Hey there!

Debian testing as in sid or stretch? On Debian Stretch I’m seeing 4.9 and snapd 2.30 (via re-exec) and the hello snap works correctly. On Debian Sid I’m seeing 4.14 and snapd 2.6.27-2 (no reexec) and hello … breaks.

I think that 2.30 contains a fix for this issue but it’s not packaged yet.

3

Hi, this is Debian Sid. I guess I’ll wait for an update to snapd. Thanks for the prompt response!

4

We’ll find someone to do the update. Thanks and sorry!

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