Date: Sun, 8 Feb 2009 20:16:56 +1100 From: Peter Jeremy <peter@vk2pj.dyndns.org> To: Danny Braniss <danny@cs.huji.ac.il> Cc: hackers@freebsd.org, freebsd-stable@freebsd.org Subject: Re: impossible packet length ... Message-ID: <20090208091656.GA31876@test71.vk2pj.dyndns.org> In-Reply-To: <E1LW5Ht-0000VH-D8@kabab.cs.huji.ac.il> References: <E1LW5Ht-0000VH-D8@kabab.cs.huji.ac.il>
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On 2009-Feb-08 10:45:13 +0200, Danny Braniss <danny@cs.huji.ac.il> wrote:
>Feb 6 18:00:13 warhol-00.cs.huji.ac.il kernel: bce0: discard frame w/o
>leading ethernet header (len 0 pkt len 0)
...
>Feb 6 19:00:00 warhol-00.cs.huji.ac.il amd[715]: Unknown $ sequence in
>"rhost:=${RHOST};type:=nfsl;fs:=${FS};rfs:=$huldig<C0>#^ZM-^KoM- abase"
>Feb 6 19:00:00 warhol-00.cs.huji.ac.il kernel: impossible packet length
>(2068989523) from nfs server sunfire:/dist
>
>which seems to point fingers at bce...
It does rather suggest that bce is not behaving. What happens if you
turn off checksum off-loading? This should make the kernel drop the
corrupt packets instead of trying to process them. If practical, you
could also try (temporarily) plugging in a different NIC.
--
Peter Jeremy
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