Package: kernel-image-2.6.9-1-686
Version: 2.6.9-3
Kernel module ipip does not has the `used' mark, even if it's necessary.
As result, user(root) can rmmod it, while ipip tunnels still exists, so
ifconfig crashes.
On the other hand, 2.4.x kernels marks ipip module as used:
Here is the transcript:
2.4.27:
~# lsmod | grep ipip
~# iptunnel ls
~# iptunnel add mode ipip local 10.0.0.14 remote 10.0.0.1
~# lsmod | grep ipip
ipip 7072 1 (autoclean)
~# rmmod ipip
ipip: Device or resource busy
2.6.9:
~# lsmod | grep ipip
~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:04:61:4D:63:8C
inet addr:10.0.0.14 Bcast:10.255.255.255 Mask:255.255.255.0
inet6 addr: fe80::204:61ff:fe4d:638c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11000730 errors:0 dropped:0 overruns:0 frame:0
TX packets:15054777 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3690217319 (3.4 GiB) TX bytes:502053761 (478.7 MiB)
Interrupt:209 Base address:0xc000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:7795835 errors:0 dropped:0 overruns:0 frame:0
TX packets:7795835 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:596016686 (568.4 MiB) TX bytes:596016686 (568.4 MiB)
~# iptunnel ls
sit0: ipv6/ip remote any local any ttl 64 nopmtudisc
~# iptunnel add mode ipip local 10.0.0.14 remote 10.0.0.1
~# iptunnel ls
sit0: ipv6/ip remote any local any ttl 64 nopmtudisc
tunl0: ip/ip remote any local any ttl inherit nopmtudisc
tunl1: ip/ip remote 10.0.0.1 local 10.0.0.14 ttl inherit
~# lsmod | grep ipip
ipip 10596 0
xfrm4_tunnel 3844 1 ipip
~# rmmod ipip
~# ifconfig
Segmentation fault
~# modprobe ipip
~# iptunnel del tunl1
~# rmmod ipip
~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:04:61:4D:63:8C
inet addr:10.0.0.14 Bcast:10.255.255.255 Mask:255.255.255.0
inet6 addr: fe80::204:61ff:fe4d:638c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11001008 errors:0 dropped:0 overruns:0 frame:0
TX packets:15054937 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3690263066 (3.4 GiB) TX bytes:502066911 (478.8 MiB)
Interrupt:209 Base address:0xc000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:7795964 errors:0 dropped:0 overruns:0 frame:0
TX packets:7795964 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:596057611 (568.4 MiB) TX bytes:596057611 (568.4 MiB)
--
WBR, Alexander A. Vlasov
Gala.Net System Administrator
+38(039)2476081
nic-hdl: ZULU-UANIC
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