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Snap building fails: swapon: /tmp/swap: swapon failed: Operation not permitted #3143

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xypron opened this issue Feb 11, 2025 · 1 comment

xypron commented Feb 11, 2025

I tried to build the snap from source on Ubuntu 25.04 riscv64 and saw this error:

+ mkswap /tmp/swap
mkswap: /tmp/swap: insecure permissions 0644, 0600 suggested.
Setting up swapspace version 1, size = 2 GiB (2097147904 bytes)
no label, UUID=aeb5e8db-442f-4b92-be51-2c6d9ed2bdf0
+ swapon /tmp/swap
swapon: /tmp/swap: insecure permissions 0644, 0600 suggested.
swapon: /tmp/swap: swapon failed: Operation not permitted
Failed to run 'override-build': Exit code was 255.

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xypron commented Feb 11, 2025 •

edited

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/tmp may reside in memory mounted as tmpfs. So putting swap into /tmp isn't a good choice. We should put it into /root.

Instead of using dd use truncate -s to create the file. So if swap is not used, nothing is written to disk.

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