Re: xtables-addons: pknock extension crashes the kernel

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On Saturday 2011-01-29 20:12, jp@xxxxxxxxx wrote:

>Hi,
>
>I am using gentoo, hardened build, kernel version 2.6.34-r6. The pknock
>module does not load, instead, it crashes. GCC version is 4.4.4-r2,
>iptables version 1.4.10. Tried all xtables-addons versions from 1.28 to
>newest 1.32, same result for all builds.

It is possible that this is fixed in v1.34:

xt_pknock: avoid crash when hash TFM could not be allocated (commit 0ba44bd)

I can't say more because you have symbols disabled in your kernel image
so that the IP value - normally suffixed by the name of the function -
is of no use.
>BUG: unable to handle kernel NULL pointer dereference at 000000000000002e
>IP: [<ffffffffa002c0a3>]
>Pid: 8772, comm: modprobe Not tainted 2.6.34-hardened-r6 #3 /ProLiant
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