[mpls-linux-general] Crash in getifaddrs() when using a mpls-enabled kernel

[Vincent U. <vin...@im...>]

Hi,

I'm experiencing the problem described in
http://sourceforge.net/mailarchive/forum.php?thread_id=3D6272612&forum_id=
=3D5051

In order to make sure I was not doing something wrong, I installed a
stock fedora core 2, used the rpm provided on the mpls-linux project
page.

Here are the steps to reproduce the crash:

[root@tom3 root]# cat /sys/mpls/version
1.946
[root@tom3 root]# mpls labelspace add dev eth0 labelspace 0
[root@tom3 root]# mpls ilm add label gen 10000 labelspace 0
[root@tom3 root]# mpls ilm show
ILM entry label gen 10000 labelspace 0 proto ipv4
        pop peek  (0 bytes, 0 pkts, 0 dropped)
[root@tom3 root]# tcpdump
Aborted
[root@tom3 root]# tcpdump -i eth0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
...
[root@tom3 root]# mpls ilm del label gen 10000 labelspace 0
[root@tom3 root]# tcpdump
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
...

Here's a stack trace:
(gdb) bt
#0  0xffffe410 in ?? ()
#1  0xbffff5b8 in ?? ()
#2  0x00000006 in ?? ()
#3  0x00000c9e in ?? ()
#4  0xb7eebe59 in raise () from /lib/tls/libc.so.6
#5  0xb7eed882 in abort () from /lib/tls/libc.so.6
#6  0xb7f9d3fb in getifaddrs () from /lib/tls/libc.so.6
#7  0x0808bedd in error ()
#8  0x0808d0b9 in pcap_setnonblock_fd ()
#9  0x08081264 in ?? ()
#10 0xbffff8c0 in ?? ()
#11 0xbffffa74 in ?? ()
#12 0x080b14a8 in _IO_stdin_used ()
#13 0x00000000 in ?? ()

I can always reproduce this. Is there anything I can do to help?

Thanks,

Vincent

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