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SubjectRe: Linux 2.6.20-rc4
David Miller <> writes:

> From: Linus Torvalds <>
> Date: Sun, 7 Jan 2007 14:50:15 -0800 (PST)
> > David, there really *is* something screwy in netfilter.
> Sure, but from what I can see this bug appears unrelated to the one in
> kernel bugzilla #7781 that we've been discussing the past few days.
> First of all, the nf conntrack paths won't be used by normal
> users until 2.6.20-rc1 or so. The bz #7781 report is against
> 2.6.19 and all those backtraces have IP conntrack in them, not
> nf conntrack.
> So what are we compiling with here btw, gcc-4.1?
> I want to rule the compiler out in this and the bz #7781 case
> so that we can look at the code seriously.

The first crash was with gcc 4.1.1, but now I recompiled the kernel
with "gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-56.fc5)" and I
can still reproduce the same crash. The backtrace looks the same,
although the addresses are obviously different. Some hand copied data
from the oops:

BUG: unable to handle kernel paging request at virtual address 1d075089
eax: cc671e5c ebx: d58569a0 ecx: d58569a0 edx: 00000014
esi: 1d075021 edi: 00000001 ebp: cc671df0 esp: cc671ddc
ds: 007b es: 007b ss: 0068
EIP: ipv4_conntrack_help+0x8e/0x93

Peter Osterlund -
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