Re: contrib/ buffer paranoia

From: Neil Conway <nconway(at)klamath(dot)dyndns(dot)org>
To: Alvaro Herrera <alvherre(at)atentus(dot)com>
Cc: PostgreSQL Patches <pgsql-patches(at)postgresql(dot)org>
Subject: Re: contrib/ buffer paranoia
Date: 2002-08-12 20:44:46
Message-ID: 87sn1jx0w1.fsf@klamath.dyndns.org
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Alvaro Herrera <alvherre(at)atentus(dot)com> writes:
> Neil Conway dijo:
> > Alvaro Herrera <alvherre(at)atentus(dot)com> writes:
> > > I think in dbase/dbf2pg.c the limit of 10 to pgdate should be 11
> > > (snprintf counts the \0 at the end).
> >
> > Yes, but so does the array declaration itself: a char[10] can hold at
> > most 9 characters plus the '\0' terminator. I think the original code
> > is buggy: if the author wants to store 10 characters plus a terminator
> > in the array, it should be declared as a char[11]. Using snprintf() of
> > length 11 with a char[10] would allow for a one-character overrun.
>
> I agree. Maybe it worked out of pure luck (or some alignment magic).
> But while you're at it, you can as well correct the bug.

Ok, a revised patch is attached that fixes the off-by-one bug in
dbase/dbf2pg.c

Thanks for the code review.

Cheers,

Neil

--
Neil Conway <neilconway(at)rogers(dot)com>
PGP Key ID: DB3C29FC

Attachment Content-Type Size
contrib-fixes-3.patch text/x-patch 29.8 KB

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