Bug#655314: linux-image-3.1.0-1-amd64: ICMPv6 debugging message

["Aleksi Suhonen" <ams@axu.tm>]

Package: linux-2.6
Version: 3.1.6-1
Severity: normal
Tags: ipv6

I'm running a Teredo relay/server using miredo-server and the
system logs are being filled with this message:

Jan 10 09:24:33 6to4 kernel: [93060.760149] icmpv6_send: no reply to icmp error
Jan 10 09:24:42 6to4 kernel: [93069.812879] icmpv6_send: no reply to icmp error

This message is generated when the kernel feels it should send
an ICMP error for a packet that itself was an ICMP error. RFC
says that you don't send errors for errors, so it's dropped, but
the developers have decided to put a debugging message in
that if-branch.

Normally that debugging message should never be displayed,
because under normal server conditions it should never occur.
However, due to the way Teredo works, this can and will happen
quite often. Would it be possible to remove or comment out
this particular debuggin message, because on normal servers
it has no value and on Teredo servers ... well ... it has no
value either but it fills the logs.

Or if it can't be removed, it should be possible to turn it
on and off using some sysctl.

-- Package-specific info:
** Kernel log: boot messages should be attached


-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.0.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=fi_FI.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages linux-image-3.1.0-1-amd64 depends on:
ii  debconf [debconf-2.0]                   1.5.41
ii  initramfs-tools [linux-initramfs-tool]  0.99
ii  linux-base                              3.4
ii  module-init-tools                       3.16-1

Versions of packages linux-image-3.1.0-1-amd64 recommends:
ii  firmware-linux-free  3

Versions of packages linux-image-3.1.0-1-amd64 suggests:
pn  grub-pc        1.99-14
pn  linux-doc-3.1  <none>

Versions of packages linux-image-3.1.0-1-amd64 is related to:
pn  firmware-bnx2           <none>
pn  firmware-bnx2x          <none>
pn  firmware-ipw2x00        <none>
pn  firmware-ivtv           <none>
pn  firmware-iwlwifi        <none>
pn  firmware-linux          <none>
pn  firmware-linux-nonfree  0.34
pn  firmware-qlogic         <none>
pn  firmware-ralink         <none>
pn  xen-hypervisor          <none>

-- debconf information excluded