Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd - PID 1 is killed it seems

2019-05-25 Thread arne
> > # while true; do kill -ILL 1 ; echo -n "." ; sleep 0.5 ; done > > > > I found out PID 1 is killed when I tried to reboot: > > # reboot > > Failed to open /dev/initctl: No such device or address > > Failed to talk to init daemon. > > > > So I will have to use SysReq keys > > > > Can somebody

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd - PID 1 is killed it seems

2019-05-25 Thread tomas
On Sat, May 25, 2019 at 08:35:45AM -0400, Kenneth Parker wrote: [...] > Can somebody, please link me to the Documentation Files on those SysReq > keys? Thanks! https://en.wikipedia.org/wiki/Magic_SysRq_key Cheers -- t signature.asc Description: Digital signature

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd - PID 1 is killed it seems

2019-05-25 Thread Kenneth Parker
On Sat, May 25, 2019, 5:45 AM arne wrote: > On Sat, 25 May 2019 00:21:07 +0200 > arne wrote: > > > On Fri, 24 May 2019 23:43:49 +0200 > > arne wrote: > > > > > On Fri, 24 May 2019 14:01:35 -0700 > > > Fred wrote: > > > > > > > Hello, > > > > I subscribe to the Devuan Linux mailing list. This

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd

2019-05-25 Thread tomas
On Sat, May 25, 2019 at 10:25:26AM +0300, Reco wrote: [...] > Seems harmless to me as one needs to be root to send signals to PID 1. This is *exactly* the point. If you are root, there are far more creative (and fun) ways to bring down your system, regardless of how your init process is called.

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd - PID 1 is killed it seems

2019-05-25 Thread arne
On Sat, 25 May 2019 00:21:07 +0200 arne wrote: > On Fri, 24 May 2019 23:43:49 +0200 > arne wrote: > > > On Fri, 24 May 2019 14:01:35 -0700 > > Fred wrote: > > > > > Hello, > > > I subscribe to the Devuan Linux mailing list. This posting just > > > arrived and it appears quite important to

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd

2019-05-25 Thread mick crane
On 2019-05-25 08:25, Reco wrote: again no problem here. Stretch's systemd: # kill -ILL 1 Message from syslogd@xxx at May 25 10:19:09 ... systemd[1]: Caught , dumped core as pid 822. ... systemd[1]: Freezing execution. The userspace and the kernel will work after this, but anything that's r

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd

2019-05-25 Thread Reco
Hi. On Sat, May 25, 2019 at 12:21:07AM +0200, arne wrote: > On Fri, 24 May 2019 23:43:49 +0200 > arne wrote: > > > On Fri, 24 May 2019 14:01:35 -0700 > > Fred wrote: > > > > > Hello, > > > I subscribe to the Devuan Linux mailing list. This posting just > > > arrived and it appears qui

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd

2019-05-24 Thread arne
On Fri, 24 May 2019 23:43:49 +0200 arne wrote: > On Fri, 24 May 2019 14:01:35 -0700 > Fred wrote: > > > Hello, > > I subscribe to the Devuan Linux mailing list. This posting just > > arrived and it appears quite important to Debian. > > > > Forwarded Message > > Subject:

Re: [DNG] Linux system can be brought down by sending SIGILL to Systemd

2019-05-24 Thread arne
On Fri, 24 May 2019 14:01:35 -0700 Fred 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 Sys