[fetchmail-devel] Re: fetchmail segfault on 'empty' mail

[Daniel D. <ds...@ge...>]

Hi Sunil,

Sunil Shetye wrote:
> Please send the output of "fetchmail -v" before and after the patch
> when you have an empty mail in your mailbox. This will show that the
> patch indeed works correctly and only that empty mail is getting
> properly deleted when you have multiple mails in your mailbox.

I don't have any more of these mails right now, so this is fairly fabricated, 
but more or less accurate.

Before:

fetchmail: 6.2.5.2 querying aap.businessserve.co.uk (protocol POP3) at Wed, 07 
Dec 2005 13:20:02 +0000 (GMT): poll started
fetchmail: POP3< +OK <..>
fetchmail: POP3> CAPA
fetchmail: POP3< -ERR authorization first
fetchmail: authorization first
fetchmail: Repoll immediately on xxx
fetchmail: POP3< +OK <..>
fetchmail: POP3> USER xxx
fetchmail: POP3< +OK
fetchmail: POP3> PASS *
fetchmail: POP3< +OK
fetchmail: POP3> STAT
fetchmail: POP3< +OK 26 82969
fetchmail: POP3> LIST 1
fetchmail: POP3< +OK 1 1329
fetchmail: POP3> RETR 1
fetchmail: POP3< +OK 1329 octets follow.
reading message xyz:1 of 26 (1329 octets)
Segmentation fault

After:

fetchmail: 6.2.5.2 querying aap.businessserve.co.uk (protocol POP3) at Wed, 07 
Dec 2005 13:20:02 +0000 (GMT): poll started
fetchmail: POP3< +OK <..>
fetchmail: POP3> CAPA
fetchmail: POP3< -ERR authorization first
fetchmail: authorization first
fetchmail: Repoll immediately on xxx
fetchmail: POP3< +OK <..>
fetchmail: POP3> USER xxx
fetchmail: POP3< +OK
fetchmail: POP3> PASS *
fetchmail: POP3< +OK
fetchmail: POP3> STAT
fetchmail: POP3< +OK 26 82969
fetchmail: POP3> LIST 1
fetchmail: POP3< +OK 1 1329
fetchmail: POP3> RETR 1
fetchmail: POP3< +OK 1329 octets follow.
reading message xyz:1 of 26 (1329 octets)
***** message delimiter found while scanning headers
flushed
fetchmail: POP3> LIST 2
...

> Do you keep on getting such empty mails frequently? Or, did that
> happen only once?

This system has been running fetchmail for about a year, and this is the first 
time I have seen this. 5 of these mails were received in a short space of time.

Daniel