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anarazelanarazel
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ltree: Zero padding bytes when allocating memory for externally visible data.
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-
1 parent 61fd218 commit 7a1d4a2

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5 files changed

+20
-20
lines changed

5 files changed

+20
-20
lines changed

‎contrib/ltree/_ltree_gist.c

Lines changed: 7 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -85,7 +85,7 @@ _ltree_compress(PG_FUNCTION_ARGS)
8585
(errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
8686
errmsg("array must not contain nulls")));
8787

88-
key = (ltree_gist *) palloc(len);
88+
key = (ltree_gist *) palloc0(len);
8989
SET_VARSIZE(key, len);
9090
key->flag = 0;
9191

@@ -116,7 +116,7 @@ _ltree_compress(PG_FUNCTION_ARGS)
116116
PG_RETURN_POINTER(retval);
117117
}
118118
len = LTG_HDRSIZE;
119-
key = (ltree_gist *) palloc(len);
119+
key = (ltree_gist *) palloc0(len);
120120
SET_VARSIZE(key, len);
121121
key->flag = LTG_ALLTRUE;
122122

@@ -196,7 +196,7 @@ _ltree_union(PG_FUNCTION_ARGS)
196196
}
197197

198198
len = LTG_HDRSIZE + ((flag & LTG_ALLTRUE) ? 0 : ASIGLEN);
199-
result = (ltree_gist *) palloc(len);
199+
result = (ltree_gist *) palloc0(len);
200200
SET_VARSIZE(result, len);
201201
result->flag = flag;
202202
if (!LTG_ISALLTRUE(result))
@@ -333,26 +333,26 @@ _ltree_picksplit(PG_FUNCTION_ARGS)
333333
/* form initial .. */
334334
if (LTG_ISALLTRUE(GETENTRY(entryvec, seed_1)))
335335
{
336-
datum_l = (ltree_gist *) palloc(LTG_HDRSIZE);
336+
datum_l = (ltree_gist *) palloc0(LTG_HDRSIZE);
337337
SET_VARSIZE(datum_l, LTG_HDRSIZE);
338338
datum_l->flag = LTG_ALLTRUE;
339339
}
340340
else
341341
{
342-
datum_l = (ltree_gist *) palloc(LTG_HDRSIZE + ASIGLEN);
342+
datum_l = (ltree_gist *) palloc0(LTG_HDRSIZE + ASIGLEN);
343343
SET_VARSIZE(datum_l, LTG_HDRSIZE + ASIGLEN);
344344
datum_l->flag = 0;
345345
memcpy((void *) LTG_SIGN(datum_l), (void *) LTG_SIGN(GETENTRY(entryvec, seed_1)), sizeof(ABITVEC));
346346
}
347347
if (LTG_ISALLTRUE(GETENTRY(entryvec, seed_2)))
348348
{
349-
datum_r = (ltree_gist *) palloc(LTG_HDRSIZE);
349+
datum_r = (ltree_gist *) palloc0(LTG_HDRSIZE);
350350
SET_VARSIZE(datum_r, LTG_HDRSIZE);
351351
datum_r->flag = LTG_ALLTRUE;
352352
}
353353
else
354354
{
355-
datum_r = (ltree_gist *) palloc(LTG_HDRSIZE + ASIGLEN);
355+
datum_r = (ltree_gist *) palloc0(LTG_HDRSIZE + ASIGLEN);
356356
SET_VARSIZE(datum_r, LTG_HDRSIZE + ASIGLEN);
357357
datum_r->flag = 0;
358358
memcpy((void *) LTG_SIGN(datum_r), (void *) LTG_SIGN(GETENTRY(entryvec, seed_2)), sizeof(ABITVEC));

‎contrib/ltree/_ltree_op.c

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -211,7 +211,7 @@ _ltree_extract_isparent(PG_FUNCTION_ARGS)
211211
PG_RETURN_NULL();
212212
}
213213

214-
item = (ltree *) palloc(VARSIZE(found));
214+
item = (ltree *) palloc0(VARSIZE(found));
215215
memcpy(item, found, VARSIZE(found));
216216

217217
PG_FREE_IF_COPY(la, 0);
@@ -234,7 +234,7 @@ _ltree_extract_risparent(PG_FUNCTION_ARGS)
234234
PG_RETURN_NULL();
235235
}
236236

237-
item = (ltree *) palloc(VARSIZE(found));
237+
item = (ltree *) palloc0(VARSIZE(found));
238238
memcpy(item, found, VARSIZE(found));
239239

240240
PG_FREE_IF_COPY(la, 0);
@@ -257,7 +257,7 @@ _ltq_extract_regex(PG_FUNCTION_ARGS)
257257
PG_RETURN_NULL();
258258
}
259259

260-
item = (ltree *) palloc(VARSIZE(found));
260+
item = (ltree *) palloc0(VARSIZE(found));
261261
memcpy(item, found, VARSIZE(found));
262262

263263
PG_FREE_IF_COPY(la, 0);
@@ -280,7 +280,7 @@ _ltxtq_extract_exec(PG_FUNCTION_ARGS)
280280
PG_RETURN_NULL();
281281
}
282282

283-
item = (ltree *) palloc(VARSIZE(found));
283+
item = (ltree *) palloc0(VARSIZE(found));
284284
memcpy(item, found, VARSIZE(found));
285285

286286
PG_FREE_IF_COPY(la, 0);

‎contrib/ltree/ltree_gist.c

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -56,7 +56,7 @@ ltree_compress(PG_FUNCTION_ARGS)
5656
ltree *val = (ltree *) DatumGetPointer(PG_DETOAST_DATUM(entry->key));
5757
int32 len = LTG_HDRSIZE + VARSIZE(val);
5858

59-
key = (ltree_gist *) palloc(len);
59+
key = (ltree_gist *) palloc0(len);
6060
SET_VARSIZE(key, len);
6161
key->flag = LTG_ONENODE;
6262
memcpy((void *) LTG_NODE(key), (void *) val, VARSIZE(val));
@@ -213,7 +213,7 @@ ltree_union(PG_FUNCTION_ARGS)
213213
isleqr = (left == right || ISEQ(left, right)) ? true : false;
214214
*size = LTG_HDRSIZE + ((isalltrue) ? 0 : SIGLEN) + VARSIZE(left) + ((isleqr) ? 0 : VARSIZE(right));
215215

216-
result = (ltree_gist *) palloc(*size);
216+
result = (ltree_gist *) palloc0(*size);
217217
SET_VARSIZE(result, *size);
218218
result->flag = 0;
219219

@@ -386,7 +386,7 @@ ltree_picksplit(PG_FUNCTION_ARGS)
386386
lu_l = LTG_GETLNODE(GETENTRY(entryvec, array[FirstOffsetNumber].index));
387387
isleqr = (lu_l == lu_r || ISEQ(lu_l, lu_r)) ? true : false;
388388
size = LTG_HDRSIZE + ((lisat) ? 0 : SIGLEN) + VARSIZE(lu_l) + ((isleqr) ? 0 : VARSIZE(lu_r));
389-
lu = (ltree_gist *) palloc(size);
389+
lu = (ltree_gist *) palloc0(size);
390390
SET_VARSIZE(lu, size);
391391
lu->flag = 0;
392392
if (lisat)
@@ -403,7 +403,7 @@ ltree_picksplit(PG_FUNCTION_ARGS)
403403
ru_l = LTG_GETLNODE(GETENTRY(entryvec, array[1 + ((maxoff - FirstOffsetNumber + 1) / 2)].index));
404404
isleqr = (ru_l == ru_r || ISEQ(ru_l, ru_r)) ? true : false;
405405
size = LTG_HDRSIZE + ((risat) ? 0 : SIGLEN) + VARSIZE(ru_l) + ((isleqr) ? 0 : VARSIZE(ru_r));
406-
ru = (ltree_gist *) palloc(size);
406+
ru = (ltree_gist *) palloc0(size);
407407
SET_VARSIZE(ru, size);
408408
ru->flag = 0;
409409
if (risat)
@@ -445,7 +445,7 @@ gist_isparent(ltree_gist *key, ltree *query)
445445
static ltree *
446446
copy_ltree(ltree *src)
447447
{
448-
ltree *dst = (ltree *) palloc(VARSIZE(src));
448+
ltree *dst = (ltree *) palloc0(VARSIZE(src));
449449

450450
memcpy(dst, src, VARSIZE(src));
451451
return dst;

‎contrib/ltree/ltree_op.c

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -211,7 +211,7 @@ inner_subltree(ltree *t, int32 startpos, int32 endpos)
211211
ptr = LEVEL_NEXT(ptr);
212212
}
213213

214-
res = (ltree *) palloc(LTREE_HDRSIZE + (end - start));
214+
res = (ltree *) palloc0(LTREE_HDRSIZE + (end - start));
215215
SET_VARSIZE(res, LTREE_HDRSIZE + (end - start));
216216
res->numlevel = endpos - startpos;
217217

@@ -268,7 +268,7 @@ ltree_concat(ltree *a, ltree *b)
268268
{
269269
ltree *r;
270270

271-
r = (ltree *) palloc(VARSIZE(a) + VARSIZE(b) - LTREE_HDRSIZE);
271+
r = (ltree *) palloc0(VARSIZE(a) + VARSIZE(b) - LTREE_HDRSIZE);
272272
SET_VARSIZE(r, VARSIZE(a) + VARSIZE(b) - LTREE_HDRSIZE);
273273
r->numlevel = a->numlevel + b->numlevel;
274274

@@ -450,7 +450,7 @@ lca_inner(ltree **a, int len)
450450
l1 = LEVEL_NEXT(l1);
451451
}
452452

453-
res = (ltree *) palloc(reslen);
453+
res = (ltree *) palloc0(reslen);
454454
SET_VARSIZE(res, reslen);
455455
res->numlevel = num;
456456

‎contrib/ltree/ltxtquery_io.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -350,7 +350,7 @@ queryin(char *buf)
350350
errmsg("ltxtquery is too large")));
351351
commonlen = COMPUTESIZE(state.num, state.sumlen);
352352

353-
query = (ltxtquery *) palloc(commonlen);
353+
query = (ltxtquery *) palloc0(commonlen);
354354
SET_VARSIZE(query, commonlen);
355355
query->size = state.num;
356356
ptr = GETQUERY(query);

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