Re: [PATCH] Fix crash when disabling auto commit - Mailing list pgadmin-hackers

From Ashesh Vashi
Subject Re: [PATCH] Fix crash when disabling auto commit
Date
Msg-id CAG7mmowqu6Pxm1vuN32obfQ8WBh=K-Kd7GrkRsBNzatDNaYv9Q@mail.gmail.com
Whole thread Raw
In response to Re: [PATCH] Fix crash when disabling auto commit  (Sanket Mehta <sanket.mehta@enterprisedb.com>)
Responses Re: [PATCH] Fix crash when disabling auto commit
List pgadmin-hackers

John,

As I understand correctly, 8th character will be '\0' (null character). Hence - wxIsAlpha() will come out of the loop in general.

But - it is possible every platform has different behaviour for wxWidgets. Can you please be specific about the operating system?

--
Thanks & Regards,

Ashesh Vashi
EnterpriseDB (Software Architect)

[Sent through mobile]

On Jun 14, 2015 2:41 PM, "Sanket Mehta" <sanket.mehta@enterprisedb.com> wrote:
Hi John,

I have tried the same, I am not getting any out of the bounds error, it simply comes out of the while loop.

Regards,
Sanket Mehta
Sr Software engineer
Enterprisedb

On Sun, Jun 14, 2015 at 2:00 PM, John Obaterspok <john.obaterspok@gmail.com> wrote:
Hello Sanket,

Just enter "rollback" and exec

The
     while(wxIsalpha(query.GetChar(wordlen)))
  wordlen++;

As the 'k' in rollback is a char it also tries the next character (worklen = 8) which causes out of bounds check.

-- john


2015-06-12 13:25 GMT+02:00 Sanket Mehta <sanket.mehta@enterprisedb.com>:
Hi John,

I have tried to reproduce the scenario but not able to reproduce the crash in my system.
can you please provide your steps which causes crash on your machine?

Regards,
Sanket Mehta
Sr Software engineer
Enterprisedb

On Fri, Jun 12, 2015 at 11:50 AM, Sanket Mehta <sanket.mehta@enterprisedb.com> wrote:
Hi,

I am looking into the same and few other issues in code and will send the patch soon.


Regards,
Sanket Mehta
Sr Software engineer
Enterprisedb

On Fri, Jun 12, 2015 at 1:49 AM, John Obaterspok <john.obaterspok@gmail.com> wrote:
Fix crash when string has only alphas (like 'rollback')

diff --git a/pgadmin/frm/frmQuery.cpp b/pgadmin/frm/frmQuery.cpp
index b5a2f56..110bbc7 100644
--- a/pgadmin/frm/frmQuery.cpp
+++ b/pgadmin/frm/frmQuery.cpp
@@ -2522,7 +2522,7 @@ bool frmQuery::isBeginNotRequired(wxString query)
  /*
  * Check word length (since "beginx" is not "begin").
  */
- while(wxIsalpha(query.GetChar(wordlen)))
+ while(wordlen < query.Length() && wxIsalpha(query.GetChar(wordlen)))
  wordlen++;
 
  /*




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