From: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com> |
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To: | Hitoshi Harada <umi(dot)tanuki(at)gmail(dot)com> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: date_in and buffer overrun |
Date: | 2012-10-02 08:05:06 |
Message-ID: | 506AA032.8@vmware.com |
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Thread: | |
Lists: | pgsql-hackers |
On 02.10.2012 01:30, Hitoshi Harada wrote:
> It seems date_in() has a risk of buffer overrun. If the input is '.',
> it sets field[0] to the beginning of workbuf and goes into
> DecodeDate(). This function checks null-termination of the head of
> string, but it can go beyond the end of string inside the first loop
> and replace some bytes with zero. The worst scenario we've seen is
> overwrite of the stack frame, in which the compiler rearranged the
> memory allocation of local variables in date_in() and work_buf is at
> lower address than field.
>
> I tried to attach a patch file but failed somehow, so I paste the fix here.
Thanks, applied to master and all supported back-branches.
- Heikki
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