LXC: Disabled dmesg, syslog still sees kernel messages

harvie

Member
Apr 5, 2017
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Hi!

I put syslog errno 1 line into the /usr/share/lxc/config/common.seccomp file and it does perfect job preventing containers to see what's in dmesg:
# dmesg
dmesg: read kernel buffer failed: Operation not permitted


but i had recently found, that the kernel messages are getting to syslog, so they can be read from /var/log/syslog file anyway... Where does the rsyslog in lxc get these messages when dmesg is disabled??? Is there way to prevent this completely?
 

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