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From: John Goerzen <jgoerzen@complete•org>
To: nncp-devel@lists.cypherpunks.ru
Subject: Re: Unexpected EOF in 7.2.0
Date: Fri, 09 Jul 2021 11:42:27 -0500 [thread overview]
Message-ID: <87a6mvcubw.fsf@complete.org> (raw)
In-Reply-To: <87czrrcy0a.fsf@complete.org>
I'm fairly baffled by this. I ran it under strace, and there's no
syscall that's returning EOF. nncp-pkt is easier to analyze under
strace, and it does a 4096-byte read, gets a 4096-byte result,
then crashes with unexpected EOF.
I don't know Go, though... I'm also baffled at how the test at
pkt.go line 163 could cause an error.
- John
On Fri, Jul 09 2021, John Goerzen wrote:
> Hello,
>
> I have a 3GB packet that was transferred from its origin to my
> gateway machine
> via nncp-call. When called on it, nncp-check works fine and
> verifies its
> integrity. However:
>
> nncp@nncp:~$ nncp-toss -progress
> 2021-07-09T15:10:27Z ERROR Tossing
> mccoy/74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q:
> unmarshal: xdr:DecodeFixedOpaque: unexpected EOF while decoding
> 8 bytes - read:
> '[]'
>
> And the log shows:
>
> When: 2021-07-09T15:12:13.896311727Z
> Err: xdr:DecodeFixedOpaque: unexpected EOF while decoding 8
> bytes - read: '[]'
> Who: rx-unmarshal
> Node: NE2CD32WK62N3QWWQLJUZXVX2WZAIMM7DBIXQVJTFDSXHAWSULBQ
> Pkt: 74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q
> Nice: 226
> Msg: Tossing
> mccoy/74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q:
> unmarshal
>
> (this is a transitional packet)
>
> Also:
>
> nncp@nncp:~$ nncp-pkt -dump <
> /var/spool/nncp/NE2CD32WK62N3QWWQLJUZXVX2WZAIMM7DBIXQVJTFDSXHAWSULBQ/rx/74HUFHYZOB7J7MLU7SHKTRODN7OH7HRLSSTKWEEDKNMXLOJBDI2Q
> main.go:163: unexpected EOF
>
> These commands that return with "unexpected EOF" are returning
> almost
> immediately. They could not possibly have processed 3GB like
> nncp-check does.
> If I omit -dump from nncp-pkt, it works fine. I tried
> reblocking with dd, and
> that didn't help either.
>
> This occurs both with go 1.14 and go 1.15.
>
> The only unique thing here is that it's from a new node on my
> network.
>
> Other packets from that node were processed successfully, though
> they were much
> smaller. I tried removing the .hdr file and that didn't help
> either (it was
> recreated).
>
> Thanks!
>
> - John
next prev parent reply other threads:[~2021-07-09 16:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-09 15:23 Unexpected EOF in 7.2.0 John Goerzen
2021-07-09 16:42 ` John Goerzen [this message]
2021-07-09 20:23 ` John Goerzen
2021-07-10 7:38 ` Sergey Matveev
2021-07-10 13:04 ` John Goerzen
2021-07-10 13:38 ` Sergey Matveev
2021-07-10 22:38 ` John Goerzen