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Bug 211065 - connecting using dialup connection cannot update /etc/resolve.conf
connecting using dialup connection cannot update /etc/resolve.conf
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Daniel Walsh
Ben Levenson
Depends On:
  Show dependency treegraph
Reported: 2006-10-16 23:50 EDT by Brian G. Anderson
Modified: 2018-04-11 15:36 EDT (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2007-03-20 11:56:24 EDT
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Brian G. Anderson 2006-10-16 23:50:04 EDT
Description of problem:
when I use the NM applet to connect a dialup connecition I get the following
message in /var/log/messages: 

Oct 16 20:31:31 porco kernel: audit(1161055891.481:36): avc:  denied  { write } 
for  pid=5934 comm="pppd" name="resolv.conf" dev=dm-0 ino=10542765 scontext=syst
em_u:system_r:pppd_t:s0 tcontext=user_u:object_r:pppd_etc_t:s0 tclass=file
Oct 16 20:31:31 porco NET[6003]: /etc/sysconfig/network-scripts/ifup-post : upda
ted /etc/resolv.conf

I do not get this if I bring the connection up using ifup.

The end result is that sometimes /etc/resolve.conf will not be updated properly.
 It looks like, instead of updating /etc/resolve/conf with the new dns server
info, it updates it with the last successful connection dns info.  So sometimes
all host resolution doesn't work.

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

How reproducible:
the avc failure occurs always when using NM to connect

Steps to Reproduce:
1. create a dailup configuration; mine was through a bluetooth modem
2. use NM to connect to dialup
Actual results:
avc denied message; with /etc/resolve.conf not always being update correctly.

Expected results:
no error

Additional info:
Comment 1 Nicola Soranzo 2007-02-15 18:44:04 EST
I have the same problem, but I have more SELinux denials like:
- SELinux is preventing the ppp daemon from inserting kernel modules. (3 times)
- SELinux is preventing /usr/sbin/pppd (pppd_t) "write" access to resolv.conf
- SELinux is preventing /bin/bash (NetworkManager_t) "read" access to ppp
(pppd_etc_t). (2 times)
- SELinux is preventing /bin/bash (NetworkManager_t) "search" access to ppp
Comment 2 Daniel Walsh 2007-03-09 11:19:02 EST
The problem here is that resolv.conf has the wrong label on it?  Is this
/etc/resolv.conf or something somewhere else?

resolv.conf should be labeled net_conf_t?
Comment 3 Daniel Walsh 2007-03-09 11:19:51 EST
restorecon /etc/resolv.conf should fix.  You can also run restorecond to
maintain the file context on this file.

service restorecond start.

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