|Summary:||Kernel Alt-sysrq functionality is _dangerous_|
|Product:||[Retired] Red Hat Linux||Reporter:||Chris Evans <chris>|
|Component:||kernel||Assignee:||Cristian Gafton <gafton>|
|Status:||CLOSED NEXTRELEASE||QA Contact:|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||1999-08-31 22:19:12 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Chris Evans 1999-05-16 22:17:12 UTC
Hi Before you punt this bug, let me give some background. It is common, especially in academia, to give console access to Linux workstations. It is also desirable for these machines to be secure. This is often done by locking the machine the keyboard/monitor is attached to, in a cupboard. In RH5.2, all console "dangers" could be turned off, e.g. ctrl-alt-del can be disabled in /etc/inittab RH6.0 introduces 2 new console dangers; reboot/halt via gdm and kernel alt-sysrq key. The former may be disabled by editing /etc/X11/gdm/gdm.conf, but the latter probably can't be turned off easily :-( So I log this bug so the issue is known about. Chris
Comment 1 Derek Tattersall 1999-05-20 15:38:59 UTC
Red Hat 6.0 ships with alt+sysreq key combination disabled. Unless you explicitly build a kernel with it enabled those keys do nothing. The gdm problem is another matter however.
Comment 2 Michael K. Johnson 1999-05-25 18:42:59 UTC
Correction: alt-sysrq is not disabled in Red Hat Linux 6.0 We need to create a kernel patch that creates a sysconf variable that controls whether alt-sysrq is enabled. We need to coordinate this with kernel folks, obviously...
Comment 3 Cristian Gafton 1999-06-16 15:25:59 UTC
Maybe Alan can take a look at this?
Comment 4 Bill Nottingham 1999-08-31 22:19:59 UTC
fixed in initscripts-4.34-1.