/proc not mounting inside CageFS

Issue

/proc not mounting inside CageFS

/proc is listed in /etc/cagefs/cagefs.mp (line 8) but is not actually mounting inside the cage. When we test:

timeout 5 cagefsctl --enter crypt354vice26 -- cat /proc/version

The command hangs and times out (SIGTERM fired). This causes ZipArchive (libzip) to hang on system calls, which is why WordPress plugin/theme installation freezes server-wide.

CONFIRMED:
- /proc is in cagefs.mp ✓
- cagefsctl --remount-all was run ✓
- /proc still not accessible inside cage ✗
- ZipArchive hangs inside CageFS ✗
- WordPress using PclZip (pure PHP fallback) would fix this ✓

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Environment

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Solution

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Cause

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Why the issue/problem/
situation happened?

Useful links

WIP#277830 .