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Message #112556
[Bug 1442609] Re: Guest session can't read "/proc/net/dev" and/or "/proc/*/net/dev"
Robert,
This is a sample of my /var/log/kern.log messages regarding xfce4
-netload-plugin attempts to read network traffic:
Apr 9 14:46:34 localhost kernel: [ 786.952187] audit: type=1400
audit(1428601594.953:805): apparmor="DENIED" operation="open"
profile="/usr/lib/lightdm/lightdm-guest-session"
name="/proc/23556/net/dev" pid=23556 comm="panel-2-netload"
requested_mask="r" denied_mask="r" fsuid=129 ouid=0
In the example above, PID 23556 belongs to command "/usr/lib/x86_64
-linux-gnu/xfce4/panel/wrapper-1.0 /usr/lib/x86_64-linux-
gnu/xfce4/panel/plugins/libnetload.so (...)"
In my experiments with apparmor profile for lightdm-guest-session, I've
found that just granting read access to /proc/[0-9]*/net/dev is enough.
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https://bugs.launchpad.net/bugs/1442609
Title:
Guest session can't read "/proc/net/dev" and/or "/proc/*/net/dev"
Status in Light Display Manager:
Triaged
Status in lightdm package in Ubuntu:
Triaged
Bug description:
I'm customizing my guest sessions in Xubuntu 15.04 and discovered that
xfce4-netload-plugin can't show current net traffic. After
investigating netload plugin source code, I've found that a possible
reason for this strange behaviour is that guest sessions are unable to
read /proc/net/dev and/or /proc/<PID>/net/dev.
Could you please review current apparmor profile for lightdm-guest-
session so it can get read access to /proc/net/dev?
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