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Prevent stack overflow in query-type functions.

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The tsquery, ltxtquery and query_int data types have a common ancestor.
Having acquired check_stack_depth() calls independently, each was
missing at least one call.  Back-patch to 9.0 (all supported versions).
This commit is contained in:
Noah Misch 2015-10-05 10:06:30 -04:00
parent 0398e071ad
commit 682a25d41c
4 changed files with 13 additions and 0 deletions
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3
contrib/intarray/_int_bool.c
View File

@ -541,6 +541,9 @@ typedef struct
static void
infix(INFIX *in, bool first)
{
/* since this function recurses, it could be driven to stack overflow. */
check_stack_depth();
if (in->curpol->type == VAL)
{
RESIZEBUF(in, 11);

3
contrib/ltree/ltxtquery_io.c
View File

@ -420,6 +420,9 @@ while( ( (inf)->cur - (inf)->buf ) + (addsize) + 1 >= (inf)->buflen ) \
static void
infix(INFIX *in, bool first)
{
/* since this function recurses, it could be driven to stack overflow. */
check_stack_depth();
if (in->curpol->type == VAL)
{
char *op = in->op + in->curpol->distance;

4
contrib/ltree/ltxtquery_op.c
View File

@ -8,6 +8,7 @@
#include <ctype.h>
#include "ltree.h"
#include "miscadmin.h"
PG_FUNCTION_INFO_V1(ltxtq_exec);
PG_FUNCTION_INFO_V1(ltxtq_rexec);
@ -18,6 +19,9 @@ PG_FUNCTION_INFO_V1(ltxtq_rexec);
bool
ltree_execute(ITEM *curitem, void *checkval, bool calcnot, bool (*chkcond) (void *checkval, ITEM *val))
{
/* since this function recurses, it could be driven to stack overflow */
check_stack_depth();
if (curitem->type == VAL)
return (*chkcond) (checkval, curitem);
else if (curitem->val == (int4) '!')

3
src/backend/utils/adt/tsquery_cleanup.c
View File

@ -34,6 +34,9 @@ maketree(QueryItem *in)
{
NODE *node = (NODE *) palloc(sizeof(NODE));
/* since this function recurses, it could be driven to stack overflow. */
check_stack_depth();
node->valnode = in;
node->right = node->left = NULL;
if (in->type == QI_OPR)