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Bug#44684: valgrind reports invalid reads in

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Item_func_spatial_collection::val_str
        
When the concatenation function for geometry data collections
reads the binary data it was not rigorous in checking that there
is data available, leading to invalid reads and crashes.
Fixed by making checking stricter.
This commit is contained in:
Martin Hansson
2009-06-17 16:58:33 +02:00
parent eecf06873e
commit e33e01e516
3 changed files with 82 additions and 3 deletions
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48
mysql-test/r/gis.result
View File

@@ -984,4 +984,52 @@ f4 geometry YES NULL
f5 datetime YES NULL
drop view v1;
drop table t1;
SELECT MultiPoint(12345,'');
MultiPoint(12345,'')
NULL
SELECT MultiPoint(123451,'');
MultiPoint(123451,'')
NULL
SELECT MultiPoint(1234512,'');
MultiPoint(1234512,'')
NULL
SELECT MultiPoint(12345123,'');
MultiPoint(12345123,'')
NULL
SELECT MultiLineString(12345,'');
MultiLineString(12345,'')
NULL
SELECT MultiLineString(123451,'');
MultiLineString(123451,'')
NULL
SELECT MultiLineString(1234512,'');
MultiLineString(1234512,'')
NULL
SELECT MultiLineString(12345123,'');
MultiLineString(12345123,'')
NULL
SELECT LineString(12345,'');
LineString(12345,'')
NULL
SELECT LineString(123451,'');
LineString(123451,'')
NULL
SELECT LineString(1234512,'');
LineString(1234512,'')
NULL
SELECT LineString(12345123,'');
LineString(12345123,'')
NULL
SELECT Polygon(12345,'');
Polygon(12345,'')
NULL
SELECT Polygon(123451,'');
Polygon(123451,'')
NULL
SELECT Polygon(1234512,'');
Polygon(1234512,'')
NULL
SELECT Polygon(12345123,'');
Polygon(12345123,'')
NULL
End of 5.1 tests

24
mysql-test/t/gis.test
View File

@@ -667,4 +667,28 @@ desc v1;
drop view v1;
drop table t1;
#
# Bug#44684: valgrind reports invalid reads in
# Item_func_spatial_collection::val_str
#
SELECT MultiPoint(12345,'');
SELECT MultiPoint(123451,'');
SELECT MultiPoint(1234512,'');
SELECT MultiPoint(12345123,'');
SELECT MultiLineString(12345,'');
SELECT MultiLineString(123451,'');
SELECT MultiLineString(1234512,'');
SELECT MultiLineString(12345123,'');
SELECT LineString(12345,'');
SELECT LineString(123451,'');
SELECT LineString(1234512,'');
SELECT LineString(12345123,'');
SELECT Polygon(12345,'');
SELECT Polygon(123451,'');
SELECT Polygon(1234512,'');
SELECT Polygon(12345123,'');
--echo End of 5.1 tests

13
sql/item_geofunc.cc
View File

@@ -416,7 +416,10 @@ String *Item_func_spatial_collection::val_str(String *str)
else
{
enum Geometry::wkbType wkb_type;
const char *data= res->ptr() + 4/*SRID*/ + 1;
const uint data_offset= 4/*SRID*/ + 1;
if (res->length() < data_offset + sizeof(uint32))
goto err;
const char *data= res->ptr() + data_offset;
/*
In the case of named collection we must check that items
@@ -439,7 +442,7 @@ String *Item_func_spatial_collection::val_str(String *str)
break;
case Geometry::wkb_linestring:
if (str->append(data, POINT_DATA_SIZE, 512))
if (len < POINT_DATA_SIZE || str->append(data, POINT_DATA_SIZE, 512))
goto err;
break;
case Geometry::wkb_polygon:
@@ -448,11 +451,15 @@ String *Item_func_spatial_collection::val_str(String *str)
double x1, y1, x2, y2;
const char *org_data= data;
if (len < 4 + 2 * POINT_DATA_SIZE)
if (len < 4)
goto err;
n_points= uint4korr(data);
data+= 4;
if (n_points < 2 || len < 4 + n_points * POINT_DATA_SIZE)
goto err;
float8get(x1, data);
data+= SIZEOF_STORED_DOUBLE;
float8get(y1, data);