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ltree: Zero padding bytes when allocating memory for externally visible data.

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ltree/ltree_gist/ltxtquery's headers stores data at MAXALIGN alignment,
requiring some padding bytes. So far we left these uninitialized. Zero
those by using palloc0.

Author: Andres Freund
Reported-By: Andres Freund / valgrind / buildarm animal skink
Backpatch: 9.1-
This commit is contained in:
Andres Freund
2016-03-08 14:59:29 -08:00
parent 6041d388c4
commit 8457c69fea
5 changed files with 20 additions and 20 deletions
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10
contrib/ltree/ltree_gist.c
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@ -56,7 +56,7 @@ ltree_compress(PG_FUNCTION_ARGS)
ltree *val = (ltree *) DatumGetPointer(PG_DETOAST_DATUM(entry->key));
int32 len = LTG_HDRSIZE + VARSIZE(val);
key = (ltree_gist *) palloc(len);
key = (ltree_gist *) palloc0(len);
SET_VARSIZE(key, len);
key->flag = LTG_ONENODE;
memcpy((void *) LTG_NODE(key), (void *) val, VARSIZE(val));
@ -213,7 +213,7 @@ ltree_union(PG_FUNCTION_ARGS)
isleqr = (left == right || ISEQ(left, right)) ? true : false;
*size = LTG_HDRSIZE + ((isalltrue) ? 0 : SIGLEN) + VARSIZE(left) + ((isleqr) ? 0 : VARSIZE(right));
result = (ltree_gist *) palloc(*size);
result = (ltree_gist *) palloc0(*size);
SET_VARSIZE(result, *size);
result->flag = 0;
@ -386,7 +386,7 @@ ltree_picksplit(PG_FUNCTION_ARGS)
lu_l = LTG_GETLNODE(GETENTRY(entryvec, array[FirstOffsetNumber].index));
isleqr = (lu_l == lu_r || ISEQ(lu_l, lu_r)) ? true : false;
size = LTG_HDRSIZE + ((lisat) ? 0 : SIGLEN) + VARSIZE(lu_l) + ((isleqr) ? 0 : VARSIZE(lu_r));
lu = (ltree_gist *) palloc(size);
lu = (ltree_gist *) palloc0(size);
SET_VARSIZE(lu, size);
lu->flag = 0;
if (lisat)
@ -403,7 +403,7 @@ ltree_picksplit(PG_FUNCTION_ARGS)
ru_l = LTG_GETLNODE(GETENTRY(entryvec, array[1 + ((maxoff - FirstOffsetNumber + 1) / 2)].index));
isleqr = (ru_l == ru_r || ISEQ(ru_l, ru_r)) ? true : false;
size = LTG_HDRSIZE + ((risat) ? 0 : SIGLEN) + VARSIZE(ru_l) + ((isleqr) ? 0 : VARSIZE(ru_r));
ru = (ltree_gist *) palloc(size);
ru = (ltree_gist *) palloc0(size);
SET_VARSIZE(ru, size);
ru->flag = 0;
if (risat)
@ -445,7 +445,7 @@ gist_isparent(ltree_gist *key, ltree *query)
static ltree *
copy_ltree(ltree *src)
{
ltree *dst = (ltree *) palloc(VARSIZE(src));
ltree *dst = (ltree *) palloc0(VARSIZE(src));
memcpy(dst, src, VARSIZE(src));
return dst;