[mpls-linux-general] Problems with MPLS 128, kernel crash

[<pim...@in...>]

Hi James,

I am able to crash the kernel (2.4.17+MPLS128+(ftos&dscp) patches from
iptables-1.2.6a) if debugging is off.

Attached is the script that sets up the DS tree.

cat /proc/net/mpls* (only relevant bits)
0x00000003 0/0/0 2 SET_EXP(01) EXP2TC( EXP(0)->TC(ffff) EXP(1)->TC(00b8)
EXP(2)->TC(0028) EXP(3)->TC(0030) EXP(4)->TC(0048) EXP(5)->TC(0050)
EXP(6)->TC(0068) EXP(7)->TC(0070) ) PUSH(gen 21650) SET(eth2,10.0.4.1)
T21650/1        0x00000003

traffic is mapped on T21650/1 via iptables (default gateway on table 2)

ping -f 10.0.2.2
.... (couple packets are sent)
*crash*

[console]
length:4
warning: kfree pased on skb still on list from 0xc01f9e18
kernel BUG: at skbuff.c:321
...
kernel panic: Aiee killing the interrupt handler...

I want to stress the fact that I am only able to reproduce it when
debugging is off.
Let me know if you need additional information/want me to test
something.

Pim.

-- 
Pim Van Heuven            Ghent University - IMEC
Department  of  Information  Technology   (INTEC)
Sint-Pietersnieuwstraat, 41 B-9000, Gent, Belgium
pim...@in...
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