BUG #4493: Memory leak in informix.c

Started by Aggroover 17 years ago2 messagesbugs
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#1Aggro
dvice_null@yahoo.com

The following bug has been logged online:

Bug reference: 4493
Logged by:
Email address: dvice_null@yahoo.com
PostgreSQL version: Latest cvs
Operating system: Error in source code
Description: Memory leak in informix.c
Details:

In file src/interfaces/ecpg/compatlib/informix.c:763

It seems to me that variable "temp" leaks memory here if initValue() fails:

temp = (char *) malloc(fmt_len + 1);

/* put all info about the long in a struct */
if (!temp || initValue(lng_val) == -1)
{
errno = ENOMEM;
return -1;
}

#2Michael Meskes
meskes@postgresql.org
In reply to: Aggro (#1)
Re: BUG #4493: Memory leak in informix.c

On Fri, Oct 24, 2008 at 08:04:24PM +0000, dvice_null@yahoo.com wrote:

In file src/interfaces/ecpg/compatlib/informix.c:763

It seems to me that variable "temp" leaks memory here if initValue() fails:

temp = (char *) malloc(fmt_len + 1);

/* put all info about the long in a struct */
if (!temp || initValue(lng_val) == -1)
{
errno = ENOMEM;
return -1;
}

Technically you're right and I will fix this in CVS. However, I doubt this
has any impact at all because there is only one failure possible in initValue
and that's ENOMEM. So an application might not free all its memory if it ever
runs out of memory. But given that the latter case will probably result in the
application being terminated the effect is nil for almost all use cases.

Michael
--
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