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82bbb60c30
The macaddr opclass stores two macaddr structs (each of size 6) in an index column that's declared as being of type gbtreekey16, ie 16 bytes. In the original coding this led to passing a palloc'd value of size 12 to the index insertion code, so that data would be fetched past the end of the allocated value during index tuple construction. This makes valgrind unhappy. In principle it could result in a SIGSEGV, though with the current implementation of palloc there's no risk since the 12-byte request size would be rounded up to 16 bytes anyway. To fix, add a field to struct gbtree_ninfo showing the declared size of the index datums, and use that in the palloc requests; and use palloc0 to be sure that any wasted bytes are cleanly initialized. Per report from Andres Freund. No back-patch since there's no current risk of a real problem.
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/*
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* contrib/btree_gist/btree_utils_num.h
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*/
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#ifndef __BTREE_UTILS_NUM_H__
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#define __BTREE_UTILS_NUM_H__
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#include "btree_gist.h"
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#include "access/gist.h"
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#include "utils/rel.h"
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#include <math.h>
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#include <float.h>
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typedef char GBT_NUMKEY;
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/* Better readable key */
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typedef struct
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{
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const GBT_NUMKEY *lower,
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*upper;
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} GBT_NUMKEY_R;
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/* for sorting */
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typedef struct
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{
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int i;
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GBT_NUMKEY *t;
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} Nsrt;
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/* type description */
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typedef struct
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{
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/* Attribs */
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enum gbtree_type t; /* data type */
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int32 size; /* size of type, 0 means variable */
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int32 indexsize; /* size of datums stored in index */
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/* Methods */
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bool (*f_gt) (const void *, const void *); /* greater than */
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bool (*f_ge) (const void *, const void *); /* greater or equal */
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bool (*f_eq) (const void *, const void *); /* equal */
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bool (*f_le) (const void *, const void *); /* less or equal */
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bool (*f_lt) (const void *, const void *); /* less than */
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int (*f_cmp) (const void *, const void *); /* key compare function */
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float8 (*f_dist) (const void *, const void *); /* key distance function */
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} gbtree_ninfo;
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/*
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* Numeric btree functions
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*/
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/*
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* Note: The factor 0.49 in following macro avoids floating point overflows
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*/
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#define penalty_num(result,olower,oupper,nlower,nupper) do { \
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double tmp = 0.0F; \
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(*(result)) = 0.0F; \
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if ( (nupper) > (oupper) ) \
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tmp += ( ((double)nupper)*0.49F - ((double)oupper)*0.49F ); \
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if ( (olower) > (nlower) ) \
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tmp += ( ((double)olower)*0.49F - ((double)nlower)*0.49F ); \
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if (tmp > 0.0F) \
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{ \
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(*(result)) += FLT_MIN; \
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(*(result)) += (float) ( ((double)(tmp)) / ( (double)(tmp) + ( ((double)(oupper))*0.49F - ((double)(olower))*0.49F ) ) ); \
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(*(result)) *= (FLT_MAX / (((GISTENTRY *) PG_GETARG_POINTER(0))->rel->rd_att->natts + 1)); \
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} \
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} while (0);
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/*
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* Convert an Interval to an approximate equivalent number of seconds
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* (as a double). Here because we need it for time/timetz as well as
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* interval. See interval_cmp_internal for comparison.
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*/
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#ifdef HAVE_INT64_TIMESTAMP
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#define INTERVAL_TO_SEC(ivp) \
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(((double) (ivp)->time) / ((double) USECS_PER_SEC) + \
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(ivp)->day * (24.0 * SECS_PER_HOUR) + \
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(ivp)->month * (30.0 * SECS_PER_DAY))
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#else
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#define INTERVAL_TO_SEC(ivp) \
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((ivp)->time + \
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(ivp)->day * (24.0 * SECS_PER_HOUR) + \
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(ivp)->month * (30.0 * SECS_PER_DAY))
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#endif
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#define GET_FLOAT_DISTANCE(t, arg1, arg2) Abs( ((float8) *((const t *) (arg1))) - ((float8) *((const t *) (arg2))) )
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#define SAMESIGN(a,b) (((a) < 0) == ((b) < 0))
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/*
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* check to see if a float4/8 val has underflowed or overflowed
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* borrowed from src/backend/utils/adt/float.c
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*/
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#define CHECKFLOATVAL(val, inf_is_valid, zero_is_valid) \
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do { \
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if (isinf(val) && !(inf_is_valid)) \
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ereport(ERROR, \
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), \
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errmsg("value out of range: overflow"))); \
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\
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if ((val) == 0.0 && !(zero_is_valid)) \
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ereport(ERROR, \
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), \
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errmsg("value out of range: underflow"))); \
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} while(0)
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extern Interval *abs_interval(Interval *a);
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extern bool gbt_num_consistent(const GBT_NUMKEY_R *key, const void *query,
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const StrategyNumber *strategy, bool is_leaf,
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const gbtree_ninfo *tinfo);
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extern float8 gbt_num_distance(const GBT_NUMKEY_R *key, const void *query,
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bool is_leaf, const gbtree_ninfo *tinfo);
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extern GIST_SPLITVEC *gbt_num_picksplit(const GistEntryVector *entryvec, GIST_SPLITVEC *v,
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const gbtree_ninfo *tinfo);
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extern GISTENTRY *gbt_num_compress(GISTENTRY *retval, GISTENTRY *entry,
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const gbtree_ninfo *tinfo);
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extern void *gbt_num_union(GBT_NUMKEY *out, const GistEntryVector *entryvec,
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const gbtree_ninfo *tinfo);
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extern bool gbt_num_same(const GBT_NUMKEY *a, const GBT_NUMKEY *b,
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const gbtree_ninfo *tinfo);
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extern void gbt_num_bin_union(Datum *u, GBT_NUMKEY *e,
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const gbtree_ninfo *tinfo);
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#endif
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