Error apply configuration with use jemalloc memory allocator and glibc 2.34

[Izorkin]

Error apply configuration with use jemalloc memory allocator and glibc 2.34. Testing on Ubuntu 21.10 and NixOS Unstable.

Steps To Reproduce

1. Install jemmalloc

   apt install libjemalloc2

2. Create file `/etc/ld.so.preload:

   /usr/lib/x86_64-linux-gnu/libjemalloc.so.2

3. Restart unit:

   systemctl restart unit

4. Write configuration config.json:

   {
   "type": "php",
   "root": "/www/blogs/scripts"
   }

5. Apply configuration:

   mkdir -p /www/blogs/scripts
   curl -X PUT --data-binary @config.json --unix-socket /var/run/control.unit.sock http://localhost/config/applications/blogs

Error:

{
        "error": "Failed to apply new configuration."
}

Debug log: unit-debug.log

OS: Ubuntu 21.10 Unit: 1.26.1 glibc: 2.34

This error also occurs on NixOS after updating glibc from version 2.33 to 2.34 - https://github.com/NixOS/nixpkgs/issues/167666

[tippexs]

Thanks for reaching out. From the debug log it looks like there is a problem with a pointer in the PHP Lang module. Could you try to use Unit with a minimal configuration:

{
    "listeners": {
        "127.0.0.1:8080": {
            "pass": "routes"
        }
    },
    "routes": [
        {
            "action": {
                "return": 204
            }
        }
    ]
}

This configuration will not call any application modules. That will help to locate the issue.

[Izorkin]

This config applied:

{
        "success": "Reconfiguration done."
}

[ac000]

I also see the same thing by simply doing (on Fedora 35, jemalloc 5.2.1, php 8.0.18)

$ LD_PRELOAD=/lib64/libjemalloc.so.2 php
free(): invalid pointer
Aborted (core dumped)