Re: Bug in pbsdbd hash function?

Is there still a bounty out for bugs ? :)

http://www.gossamer-threads.com/lists/qmail/users/133800

2010/6/25 Diego Chaparro González <[email protected]>

> [image: acens - the hosting company] <http://www.acens.com>
>
>
>
>                 Hi,
>
>
>
>                 We have been using pbsdbd for years without any problem,
> but some days ago it started to fail with the next message:
>
>
>
>                 “pbsdbd: fatal: cache corrupted”
>
>
>
>                 After analyzing the source code, we found that hash
> function in pbsdbd.c returns 0 for some IP addresses, which causes above
> message and makes pbsdbd to die and start again with an empty table. It can
> be reproduced inserting twice, for example next IP: 4.214.93.234.
>
>
>
>                 The probability to get a 0 in the hash function is low,
> about 0.00037% over 2^32 IP addresses, but it’s a real problem if one of
> your clients has one of these addresses.
>
>
>
>                 Have you ever had this problem? Do you know any way to fix
> it?
>
>
>
> Thanks in advance.
>
> Diego Chaparro González
> Departamento de Sistemas
> acens Technologies S.L.
>
> [email protected]
> Teléfono: 902 114 098
> Fax: 911 418 501
>
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