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Posted to users@httpd.apache.org by Robbie Roerbak <ro...@outlook.com> on 2024/02/05 16:15:41 UTC
[users@httpd] Re: mod_fcgid problem in chroot: (38)Function not implemented
Dear all,
To reply to myself: I resolved the problem by doing:
mount --rbind /dev /chroot/apache/dev/
Kind regards,
Robbie
________________________________
From: Robbie Roerbak <ro...@outlook.com>
Sent: 31 January 2024 17:45
To: users@httpd.apache.org <us...@httpd.apache.org>
Subject: [users@httpd] mod_fcgid problem in chroot: (38)Function not implemented
Dear all,
Wishing you a good day. My day could have been better, I've been battling a problem with mod_fcgid in combination with ModSecurity's SecChrootDir feature, which chroots the webserver into /chroot/apache. The virtualhosts live under this and it's a nice feature.
As soon as I enable mod_fcgid, Apache fails to start with the following error message:
[fcgid:emerg] [pid 5344] (38)Function not implemented: mod_fcgid: Can't create shared memory for size 1200712 bytes
My OS is Ubuntu 20.04 LTS.
I've tried:
*
ensuring /chroot/apache/var/run/fcgid_shm and fcgidsock exist with mode 1777
* creating /chroot/apache/dev/shm with mode 1777
*
using 'strace apache2ctl start' to see what syscall is being attempted, and hacking the apachectl script to start Apache directly even in the presence of $need_systemd so that it runs Apache directly - still I don't get any useful information from this
*
The error disappears whenever I disable the chroot functionality, but for security reasons I'd really like to keep the chroot enabled.
Can anyone give me a hint to further debug this problem?
Kind regards,
Robbie