Messages in this thread | | | Date | Fri, 6 Sep 2019 13:02:21 +0200 | From | Jean Delvare <> | Subject | /dev/mem and secure boot |
| |
I've been bitten recently by mcelog not working on machines started in secure boot mode. mcelog tries to read DMI information from /dev/mem and fails to open it.
This made me wonder: if not even root can read /dev/mem (nor, I suppose, /dev/kmem and /dev/port) in secure boot mode, why are we creating these device nodes at all in the first place? Can't we detect that we are in secure boot mode and skip that step, and reap the rewards (faster boot, lower memory footprint and less confusion)?
Thanks, -- Jean Delvare SUSE L3 Support
| |