grsec and PulseAudio (and Gentoo)

By Arun | Published: October 30, 2012

This problem seems to bite some of our hardened users a couple of times a year, so thought I’d blog about it. If you are using grsec and PulseAudio, you must not enable CONFIG_GRKERNSEC_SYSFS_RESTRICT in your kernel, else autodetection of your cards will fail.

PulseAudio’s module-udev-detect needs to access /sys to discover what cards are available on the system, and that kernel option disallows this for anyone but root.

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