Wireshark-bugs: [Wireshark-bugs] [Bug 1702] PPPoE packets in Ethernet captures on Linux have bogus payload lengths

From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Mon, 3 Sep 2007 09:33:37 +0000 (GMT)

http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1702


toralf.foerster@xxxxxx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED




------- Comment #2 from toralf.foerster@xxxxxx  2007-09-03 09:33 GMT -------
(In reply to comment #1)

> Either the PPPoE header on the wire is bad, or the Linux networking stack is
> somehow mangling it.  

You're right, I got last week a series of 7 patches from Herburt Xu related to
the problem. He wrote:

  "If he were using the kernel pppoe driver, then this is because
  PPP filtering is writing over a cloned skb without copying it.

  In fact, there seems to be quite a few bugs of this kind in
  the various ppp*.c files."

After applying his patches most of the issues with wrong checksums etc. went
away.


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