Re: Plug minor memleak in pg_dump - Mailing list pgsql-hackers

Em qua., 9 de fev. de 2022 às 23:16, Michael Paquier <michael@paquier.xyz> escreveu:

On Wed, Feb 09, 2022 at 02:48:35PM -0300, Ranier Vilela wrote:
> IMO I think that still have troubles here.
>
> ReadStr can return NULL, so the fix can crash.

-           sscanf(tmp, "%u", &te->catalogId.tableoid);
-           free(tmp);
+           if (tmp)
+           {
+               sscanf(tmp, "%u", &te->catalogId.tableoid);
+               free(tmp);
+           }
+           else
+               te->catalogId.tableoid = InvalidOid;

This patch makes things worse, doesn't it? 

No.

 

Doesn't this localized
change mean that we expose ourselves more into *ignoring* TOC entries
if we mess up with this code in the future?

InvalidOid already used for "default".

If ReadStr fails and returns NULL, sscanf will crash.

Maybe in this case, better report to the user?

pg_log_warning?