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CONFIG_LDISC_AUTOLOAD: Automatically load TTY Line Disciplines

General informations

The Linux kernel configuration item CONFIG_LDISC_AUTOLOAD:

Help text

Historically the kernel has always automatically loaded any line discipline that is in a kernel module when a user asks for it to be loaded with the TIOCSETD ioctl, or through other means. This is not always the best thing to do on systems where you know you will not be using some of the more "ancient" line disciplines, so prevent the kernel from doing this unless the request is coming from a process with the CAP_SYS_MODULE permissions.

Say 'Y' here if you trust your userspace users to do the right thing, or if you have only provided the line disciplines that you know you will be using, or if you wish to continue to use the traditional method of on-demand loading of these modules by any user.

This functionality can be changed at runtime with the dev.tty.ldisc_autoload sysctl, this configuration option will only set the default value of this functionality.



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