Re: Ask for two questions on psqlodbc - Mailing list pgsql-odbc

(2014/07/07 22:37), cobainpluto wrote:
> Dear,
>
> Could you please tell me when will you fix it?

I already fixed the first one.
Please look at
 http://git.postgresql.org/gitweb/?p=psqlodbc.git;a=commit;h=86198069efe4cffed05eecf8669c5772334d273d
.
As for the 2nd one, I don't understand how it occurs.
Anyway it may be safe to add some check.

regards,
Hiroshi Inoue

> Thanks!
>
> regards,
> Pluto Cobain>
>
>  > Date: Thu, 3 Jul 2014 23:35:33 +0900
>  > From: inoue@tpf.co.jp
>  > To: pluto_cbin@outlook.com; pgsql-odbc@postgresql.org
>  > Subject: Re: [ODBC] Ask for two questions on psqlodbc
>  >
>  > Hi,
>  >
>  > (2014/07/02 18:09), cobainpluto wrote:
>  > > Dear all，
>  > > Recently, I used Static Code Analyzer(Fortify) to analyze
>  > > psqlodbc-09.03.0300 codes, and found two potential Memory Leak
>  > > problems in qresult.c file.
>  > >
>  > > Details are as follows :
>  > > 1.Potential Memory Leak problem
>  > > qresult.c:962: in QR_next_tuple()
>  > > 962 mres = CC_send_query(conn, movecmd, NULL, 0, stmt);
>  > > There is a dynamically allocated memory in CC_send_query_append(...).
>  > > If follow the below path, from here to RETURN (-1), the applied memory
>  > > space is not free, so it is possiblehas to generate Memory
>  > > Leak.
>  > > ---------------------------------------------------------------
>  > > qresult.c:963 - BranchNotTaken : Branch not taken: (mres != 0)
>  > > qresult.c:971 - BranchTaken : Branch taken: (sscanf(mres->command,
> "MOVE
>  > > %lu", (&moved)) > 0)
>  > > qresult.c:974 - BranchTaken : Branch taken: (moved < movement)
>  > > qresult.c:993 - BranchTaken : Branch taken: (2 == self->move_direction)
>  > > qresult.c:998 - BranchTaken : Branch taken: (getNthValid(self,
> (<inline
>  > > expression> - 1), 4, self->move_offset, (&backpt)) < 0)
>  > > qresult.c:1004 - EndScope : RETURN(-1)
>  >
>  > It seems a memory leak.
>  > I would fix it.
>  >
>  > > ---------------------------------------------------------------
>  > >
>  > > 2、Potential Null Dereference problem
>  > > qresult.c:1691: in QR_read_a_tuple_from_db()
>  > > 1691 &this_keyset->blocknum, &this_keyset->offset);
>  > > qresult.c:1693: in QR_read_a_tuple_from_db()
>  > > 1693 this_keyset->oid = strtoul(buffer, NULL, 10);
>  > > Here reference to the this_keyset.
>  > > If follow the below path,value of this_keyset is always NULL before
>  > > referring to this_keyset, so it is possiblehas to generate Null
>  > > Dereference possible.
>  > > ---------------------------------------------------------------
>  > > qresult.c:1571 - Assigned null : KeySet *this_keyset = NULL;
>  > > qresult.c:1590 - BranchNotTaken : Branch not taken: (0 ==
> (self->flags & 1))
>  > > qresult.c:1624 - BranchTaken : Branch taken: (field_lf < ci_num_fields)
>  > > qresult.c:1668 - BranchNotTaken : Branch not taken: (isnull == 0)
>  > > qresult.c:1676 - BranchTaken : Branch taken: (field_lf >=
> effective_cols)
>  > > qresult.c:1687 - BranchTaken : Branch taken: (field_lf >=
> effective_cols)
>  >
>  > Though I'm suspcious if it could occur, I would check it.
>  >
>  > Thanks.
>  > Hiroshi Inoue
>  >
>  >
>  > --
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