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Fix member access within misaligned address in chunk_update_colstats

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The array argument passed to array_length is treated as AnyArrayType
which is a union of ArrayType and ExpandedArrayHeader, which lead to
member access within misaligned address when used on the argument
passed to array_length by chunk_update_colstats which is ArrayType.
This commit is contained in:
Sven Klemm 2020-10-09 01:08:42 +02:00 committed by Sven Klemm
parent 4b4db04c1e
commit e79c0648cf
1 changed files with 14 additions and 14 deletions
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28
tsl/src/chunk_api.c
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@ -4,25 +4,26 @@
* LICENSE-TIMESCALE for a copy of the license. * LICENSE-TIMESCALE for a copy of the license.
*/ */
#include <postgres.h> #include <postgres.h>
#include <utils/jsonb.h>
#include <utils/lsyscache.h>
#include <utils/syscache.h>
#include <utils/builtins.h>
#include <catalog/indexing.h>
#include <catalog/pg_type.h>
#include <catalog/pg_class.h>
#include <catalog/pg_inherits.h>
#include <catalog/pg_operator.h>
#include <catalog/pg_namespace.h>
#include <access/htup.h>
#include <access/htup_details.h> #include <access/htup_details.h>
#include <access/htup.h>
#include <access/multixact.h>
#include <access/visibilitymap.h> #include <access/visibilitymap.h>
#include <access/xact.h> #include <access/xact.h>
#include <access/multixact.h> #include <catalog/indexing.h>
#include <catalog/pg_class.h>
#include <catalog/pg_inherits.h>
#include <catalog/pg_namespace.h>
#include <catalog/pg_operator.h>
#include <catalog/pg_type.h>
#include <commands/vacuum.h> #include <commands/vacuum.h>
#include <fmgr.h> #include <fmgr.h>
#include <funcapi.h> #include <funcapi.h>
#include <miscadmin.h> #include <miscadmin.h>
#include <utils/array.h>
#include <utils/builtins.h>
#include <utils/jsonb.h>
#include <utils/lsyscache.h>
#include <utils/syscache.h>
#include <catalog.h> #include <catalog.h>
#include <compat.h> #include <compat.h>
@ -949,8 +950,7 @@ chunk_update_colstats(Chunk *chunk, int16 attnum, float nullfract, int32 width,
Assert(HeapTupleIsValid(type_tuple)); Assert(HeapTupleIsValid(type_tuple));
type = (Form_pg_type) GETSTRUCT(type_tuple); type = (Form_pg_type) GETSTRUCT(type_tuple);
Assert(slot_values[k] != NULL); Assert(slot_values[k] != NULL);
nelems = DatumGetInt32( nelems = ARR_DIMS(slot_values[k])[0];
DirectFunctionCall2(array_length, PointerGetDatum(slot_values[k]), Int32GetDatum(1)));
decoded_data = palloc0(nelems * sizeof(Datum)); decoded_data = palloc0(nelems * sizeof(Datum));