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Commitb0ae6db

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psql: Fix memory leak with repeated calls of \bind
Calling \bind repeatedly would cause the memory allocated for the listof bind parameters to be leaked after each call, as the list is resetwhen beginning a single call.This issue is fixed by making the cleanup of the bind parameter listmore aggressive, refactoring it into a single routine called afterprocessing a query and before running an individual \bind.HEAD required more surgery and has been fixed by87eeada. Issueintroduced by5b66de3.Reported-by: Anthonin BonnefoyDiscussion:https://postgr.es/m/2e5b89af-a351-ff0a-000c-037ac28314ab@gmail.comBackpatch-through: 16
1 parent19b389c commitb0ae6db

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3 files changed

+23
-9
lines changed

3 files changed

+23
-9
lines changed

‎src/bin/psql/command.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -471,7 +471,7 @@ exec_command_bind(PsqlScanState scan_state, bool active_branch)
471471
intnparams=0;
472472
intnalloc=0;
473473

474-
pset.bind_params=NULL;
474+
clean_bind_state();
475475

476476
while ((opt=psql_scan_slash_option(scan_state,OT_NORMAL,NULL, false)))
477477
{

‎src/bin/psql/common.c

Lines changed: 21 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -1275,14 +1275,7 @@ SendQuery(const char *query)
12751275
}
12761276

12771277
/* clean up after \bind */
1278-
if (pset.bind_flag)
1279-
{
1280-
for (i=0;i<pset.bind_nparams;i++)
1281-
free(pset.bind_params[i]);
1282-
free(pset.bind_params);
1283-
pset.bind_params=NULL;
1284-
pset.bind_flag= false;
1285-
}
1278+
clean_bind_state();
12861279

12871280
/* reset \gset trigger */
12881281
if (pset.gset_prefix)
@@ -2252,6 +2245,26 @@ uri_prefix_length(const char *connstr)
22522245
return0;
22532246
}
22542247

2248+
/*
2249+
* Reset state related to \bind
2250+
*
2251+
* Clean up any state related to bind parameters and bind_flag. This needs
2252+
* to be called after processing a query or when running \bind.
2253+
*/
2254+
void
2255+
clean_bind_state(void)
2256+
{
2257+
if (pset.bind_flag)
2258+
{
2259+
for (inti=0;i<pset.bind_nparams;i++)
2260+
free(pset.bind_params[i]);
2261+
free(pset.bind_params);
2262+
}
2263+
2264+
pset.bind_params=NULL;
2265+
pset.bind_flag= false;
2266+
}
2267+
22552268
/*
22562269
* Recognized connection string either starts with a valid URI prefix or
22572270
* contains a "=" in it.

‎src/bin/psql/common.h

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -41,6 +41,7 @@ extern bool standard_strings(void);
4141
externconstchar*session_username(void);
4242

4343
externvoidexpand_tilde(char**filename);
44+
externvoidclean_bind_state(void);
4445

4546
externboolrecognized_connection_string(constchar*connstr);
4647

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