[pkg-fetchmail-maint] Bug#513695: fetchmail: race in MSG_PEEK

[Frans Pop]

On Monday 02 March 2009, Matthias Andree wrote:
> Am 27.02.2009, 12:03 Uhr, schrieb Frans Pop <elendil at planet.nl>:
> > On Friday 27 February 2009, you wrote:
> >> > I should be able to catch this in a TCP dump if needed.
> >>
> >> That would be nice, please do so.
> >
> > Would an strace help as well? If so, for what system calls?
>
> please check the tcpdump for "URG"ent data - that's likely triggering
> the messages. You could try to strace, the -e trace=network macro
> should do.

I have an strace and tcpdump for a fetchmail run that produces the error.
I don't see any URG data in the dump.

The syslog shows (account name removed):
Mar  3 20:38:01 elrond fetchmail[10659]: 3 messages (1 seen) for xxxxxxx at pop.planet.nl (29679 octets).
Mar  3 20:38:01 elrond kernel: TCP(fetchmail:10659): Application bug, race in MSG_PEEK.
Mar  3 20:38:01 elrond fetchmail[10659]: reading message xxxxxxx at pop.wxs.nl:2 of 3 (19564 octets) flushed
Mar  3 20:38:01 elrond fetchmail[10659]: reading message xxxxxxx at pop.wxs.nl:3 of 3 (4644 octets) flushed

As the traces contain private data, I don't want to attach them in the
BR or publish them, but if people want to analyze them, please mail me
privately and I'll send you the data.

Cheers,
FJP