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Re: segfault at aset.c:539

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Tomas Szepe <szepe(at)pinerecords(dot)com>
Cc: pgsql-bugs(at)postgresql(dot)org, gnotari(at)linkgroup(dot)it
Subject: Re: segfault at aset.c:539
Date: 2003-07-14 16:49:25
Message-ID: 2258.1058201365@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
Tomas Szepe <szepe(at)pinerecords(dot)com> writes:
> I'm getting an ugly non-deterministic segfault in postmaster
> at aset.c:539.
> ...
> Anyone with a fix? :)

Yech.  This is the *second* buffer-overrun bug we've found in to_ascii()
in the last couple months.  I've now taken a close look at that whole
file and I think the rest of it is okay, but ... :-(

Patch against 7.3.3 is attached.

			regards, tom lane

*** src/backend/utils/adt/ascii.c.orig	Wed Apr  2 16:08:07 2003
--- src/backend/utils/adt/ascii.c	Mon Jul 14 12:37:33 2003
***************
*** 94,100 ****
  {
  	pg_to_ascii(
  				(unsigned char *) VARDATA(data),		/* src */
! 				VARDATA(data) + VARSIZE(data),	/* src end */
  				(unsigned char *) VARDATA(data),		/* desc */
  				enc);			/* encoding */
  
--- 94,100 ----
  {
  	pg_to_ascii(
  				(unsigned char *) VARDATA(data),		/* src */
! 				(unsigned char *) (data) + VARSIZE(data),	/* src end */
  				(unsigned char *) VARDATA(data),		/* desc */
  				enc);			/* encoding */
  

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