On Fri, 24 May 2019 23:43:49 +0200 arne <sp113...@telfort.nl> wrote: > On Fri, 24 May 2019 14:01:35 -0700 > Fred <f...@blakemfg.com> wrote: > > > Hello, > > I subscribe to the Devuan Linux mailing list. This posting just > > arrived and it appears quite important to Debian. > > > > -------- Forwarded Message -------- > > Subject: [DNG] Linux system can be brought down by sending > > SIGILL to Systemd > > Date: Fri, 24 May 2019 22:04:34 +0200 > > From: Martin Steigerwald <mar...@lichtvoll.de> > > To: DNG <d...@lists.dyne.org> > > > > > > > > Hi! > > > > Today in a Linux training a participant attempted to bring down > > Debian workstation with Systemd by sending signals to PID 1 as I > > invited them to try to bring down PID 1 while thinking for myself > > that this would not be possible from my past experiences about > > trying to bring down PID 1 – init – myself. > > # while true; do kill -ILL 1 ; echo -n "." ; sleep 0.5 ; done > ...........................^C > > no problem here > kernel 5.1.4 stretch amd64 with systemd >
Perhaps that test was a little too short so I let it run a little longer: # while true; do kill -ILL 1 ; echo -n "." ; sleep 0.5 ; done ..................................................................................................................................................................................................................................................................................................................................................................................................................................................^C again no problem here. I had no fear to run the script as I use systemd, so I know how to use the SysReq keys very well ;)
