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Description of problem:

Due to race condition sadc can pass SIGINT to init process and cause unexpected reboot.

Version-Release number of selected component (if applicable):

sysstat-10.1.5-7.el7.x86_64


How reproducible:

Easily


Steps to Reproduce:
1. create script

# cat /tmp/sadc_loop.sh 
while true;do
  sar 10 2 -u -P ALL -r -n DEV
done

2. execute

# /tmp/sadc_loop.sh

3. press ^C often


Actual results:

ctrl-alt-del.target is invoked soon

Expected results:

No signal is passed to init process, no reboot can be invoked.

Additional info:

Upstream issue, patch candidate:

https://github.com/sysstat/sysstat/issues/33

https://github.com/sysstat/sysstat/commit/c3de69658006af0e0e3b7746e8646b8b4cdd2860

Reproduced on sysstat-10.1.5-7.el7, system was rebooted after pressing ctrl+c.
Verified on sysstat-10.1.5-11.el7. No reboot was invoked by pressing ctrl+c several times.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2327.html