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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 9286ff78f8
commit 28dea9485e
4 changed files with 13 additions and 0 deletions
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4
contrib/ltree/ltxtquery_op.c
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@ -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 == (int32) '!')