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Bug 1277094 - ip neighbour segfaults if bad mac address is used
Summary: ip neighbour segfaults if bad mac address is used
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: iproute
Version: 7.2
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Phil Sutter
QA Contact: Jaroslav Aster
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-11-02 10:42 UTC by Jaroslav Aster
Modified: 2016-11-03 23:36 UTC (History)
2 users (show)

Fixed In Version: iproute-3.10.0-57.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1277102 (view as bug list)
Environment:
Last Closed: 2016-11-03 23:36:44 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2016:2162 0 normal SHIPPED_LIVE iproute bug fix and enhancement update 2016-11-03 13:14:33 UTC

Description Jaroslav Aster 2015-11-02 10:42:16 UTC 
Description of problem:

ip neighbour segfaults if bad mac address is used.

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

iproute-3.10.0-54.el7

How reproducible:

100%

Steps to Reproduce:

# ip link add test-iface type dummy
# ip link set test-iface up
# ip neigh add 192.168.100.3 lladdr 00:c0:7b:7d:00:c10 dev test-iface nud reachable
"c10" is invalid lladdr.
Segmentation fault
# ip link del test-iface

Actual results:

There is segfaults.

Expected results:

No segfaults.

Additional info:
Comment 5 Jaroslav Aster 2016-05-17 15:29:44 UTC 
Hi Phil,

bug seems to be fixed, but there is some a difference in the return code between RHEL-6 and RHEL-7. Is it ok?

RHEL-6:

:: [  BEGIN   ] :: Running 'ip neigh add 192.168.100.11 lladdr 00:c0:7b:7d:00:c16 dev test-iface nud permanent'
"c16" is invalid lladdr.
:: [   PASS   ] :: Command 'ip neigh add 192.168.100.11 lladdr 00:c0:7b:7d:00:c16 dev test-iface nud permanent' (Expected 255, got 255)

RHEL-7:

:: [  BEGIN   ] :: Running 'ip neigh add 192.168.100.11 lladdr 00:c0:7b:7d:00:c16 dev test-iface nud permanent'
"c16" is invalid lladdr.
:: [   FAIL   ] :: Command 'ip neigh add 192.168.100.11 lladdr 00:c0:7b:7d:00:c16 dev test-iface nud permanent' (Expected 255, got 1)

On RHEL-6 the return code is 255 and on RHEL-7 the return code is 1 (and I have expected 255).
Comment 6 Phil Sutter 2016-05-17 17:42:31 UTC 
Hi Jaroslav,

(In reply to Jaroslav Aster from comment #5) 
> bug seems to be fixed, but there is some a difference in the return code
> between RHEL-6 and RHEL-7. Is it ok?

Yes, this is OK. The reason is iproute2 since version 3.1 contains commit 7397944de6c11 ("ip: fix exit codes"), which changes the behaviour. The internal error code returned is -1, which previously was cast to unsigned (255) and now is inverted (1).

Cheers, Phil
Comment 9 errata-xmlrpc 2016-11-03 23:36:44 UTC 
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/RHEA-2016-2162.html
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