Re: psql Segfaults shortly after doing variable substitution

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: "William K(dot) Volkman" <wkvpsql(at)netshark(dot)com>
Cc: pgsql-patches(at)postgresql(dot)org
Subject: Re: psql Segfaults shortly after doing variable substitution
Date: 2002-06-14 04:46:01
Message-ID: 200206140446.g5E4k1s27508@candle.pha.pa.us
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Your patch has been added to the PostgreSQL unapplied patches list at:

http://candle.pha.pa.us/cgi-bin/pgpatches

I will try to apply it within the next 48 hours.

---------------------------------------------------------------------------

William K. Volkman wrote:
> Noted with versions 7.0.3, 7.1.3, and 7.2.1:
>
> The psql interpreter becomes unstable if variable substitutions
> are used. The debugger GDB was unable to help however mpatrol
> reports that the sprintf at mainloop.c:389 is steping one byte
> farther than the allocation.
>
> Patch file attached.
>
> Cheers,
> William.
>
>
>

> --- postgresql-7.1.3/src/bin/psql/mainloop.c~ Mon Mar 26 08:18:51 2001
> +++ postgresql-7.1.3/src/bin/psql/mainloop.c Tue May 28 15:00:12 2002
> @@ -379,7 +379,8 @@
> {
> out_length = strlen(value);
>
> - new = malloc(len + out_length - (1 + in_length) + 1);
> + /* Allow for 'after' character also 2002-05-27 */
> + new = malloc(len + out_length - (1 + in_length) + 1 + 1);
> if (!new)
> {
> psql_error("out of memory\n");

>
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--
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