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Commit79048ca

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committed
Install check_stack_depth() protection in two recursive tsquery
processing routines. Per Heikki.
1 parentac20d3d commit79048ca

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2 files changed

+17
-5
lines changed

2 files changed

+17
-5
lines changed

‎src/backend/utils/adt/tsquery.c‎

Lines changed: 9 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,20 +7,22 @@
77
*
88
*
99
* IDENTIFICATION
10-
* $PostgreSQL: pgsql/src/backend/utils/adt/tsquery.c,v 1.1 2007/08/21 01:11:19 tgl Exp $
10+
* $PostgreSQL: pgsql/src/backend/utils/adt/tsquery.c,v 1.2 2007/08/31 02:26:29 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
1414

1515
#include"postgres.h"
1616

1717
#include"libpq/pqformat.h"
18+
#include"miscadmin.h"
1819
#include"tsearch/ts_locale.h"
1920
#include"tsearch/ts_type.h"
2021
#include"tsearch/ts_utils.h"
2122
#include"utils/memutils.h"
2223
#include"utils/pg_crc.h"
2324

25+
2426
/* parser's states */
2527
#defineWAITOPERAND 1
2628
#defineWAITOPERATOR2
@@ -234,11 +236,13 @@ pushval_asis(TSQueryParserState * state, int type, char *strval, int lenval, int
234236
}
235237

236238
#defineSTACKDEPTH32
239+
237240
/*
238241
* make polish notation of query
239242
*/
240243
staticint4
241-
makepol(TSQueryParserState*state,void (*pushval) (TSQueryParserState*,int,char*,int,int2))
244+
makepol(TSQueryParserState*state,
245+
void (*pushval) (TSQueryParserState*,int,char*,int,int2))
242246
{
243247
int4val=0,
244248
type;
@@ -248,6 +252,9 @@ makepol(TSQueryParserState * state, void (*pushval) (TSQueryParserState *, int,
248252
int4lenstack=0;
249253
int2weight=0;
250254

255+
/* since this function recurses, it could be driven to stack overflow */
256+
check_stack_depth();
257+
251258
while ((type=gettoken_query(state,&val,&lenval,&strval,&weight))!=END)
252259
{
253260
switch (type)

‎src/backend/utils/adt/tsvector_op.c‎

Lines changed: 8 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
*
88
*
99
* IDENTIFICATION
10-
* $PostgreSQL: pgsql/src/backend/utils/adt/tsvector_op.c,v 1.1 2007/08/21 01:11:19 tgl Exp $
10+
* $PostgreSQL: pgsql/src/backend/utils/adt/tsvector_op.c,v 1.2 2007/08/31 02:26:29 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -19,6 +19,7 @@
1919
#include"executor/spi.h"
2020
#include"funcapi.h"
2121
#include"mb/pg_wchar.h"
22+
#include"miscadmin.h"
2223
#include"tsearch/ts_type.h"
2324
#include"tsearch/ts_utils.h"
2425
#include"utils/builtins.h"
@@ -525,14 +526,18 @@ checkcondition_str(void *checkval, QueryItem * val)
525526
* check for boolean condition
526527
*/
527528
bool
528-
TS_execute(QueryItem*curitem,void*checkval,boolcalcnot,bool (*chkcond) (void*checkval,QueryItem*val))
529+
TS_execute(QueryItem*curitem,void*checkval,boolcalcnot,
530+
bool (*chkcond) (void*checkval,QueryItem*val))
529531
{
532+
/* since this function recurses, it could be driven to stack overflow */
533+
check_stack_depth();
534+
530535
if (curitem->type==VAL)
531536
returnchkcond(checkval,curitem);
532537
elseif (curitem->val== (int4)'!')
533538
{
534539
return (calcnot) ?
535-
((TS_execute(curitem+1,checkval,calcnot,chkcond)) ? false : true)
540+
!TS_execute(curitem+1,checkval,calcnot,chkcond)
536541
: true;
537542
}
538543
elseif (curitem->val== (int4)'&')

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