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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:
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).
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
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