Re: Lack of Sanity Checking in file 'pctcl.c' for PostgreSQL 9.4.x

From: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
To: Bill Parker <wp02855(at)gmail(dot)com>
Cc: PostgreSQL mailing lists <pgsql-bugs(at)postgresql(dot)org>
Subject: Re: Lack of Sanity Checking in file 'pctcl.c' for PostgreSQL 9.4.x
Date: 2015-06-12 07:05:44
Message-ID: CAB7nPqRmXz2DymNd_BX8HkaRJuQCTUyhh2d5Zx+d0aHNvpTw0Q@mail.gmail.com
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On Fri, Jun 12, 2015 at 4:22 AM, Bill Parker wrote:
> In reviewing some code, in directory 'postgresql-9.4.3/src/pl/tcl',
> file 'pltcl.c', there are several instances where calls to malloc()
> are made, but no check for a return value of NULL is made, which
> would indicate failure. Additionally, it appears when malloc()
> returns NULL, previously allocated memory in function 'perm_fmgr_info'
> is not released, which could lead to memory leaks (even though the
> comment at the top says 'this routine is a crock' :)
>
> If you know how this problem might be fixed, list the solution below:
> Please feel free to review and comment on the above patch file...

Oh, nice catch again.

> I am attaching the patch file to this bug report

By the way, your patch does not compile properly and is not in-line
with the project's code format. See the updated patch attached ;)
--
Michael

Attachment Content-Type Size
20150612_pltcl_oom.patch text/x-diff 1.4 KB

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