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[bugfix](vectorized) vectorized write: invalid memory access caused by podarray resize #9556

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merged 1 commit into from
May 14, 2022
Merged

[bugfix](vectorized) vectorized write: invalid memory access caused by podarray resize #9556

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77 changes: 51 additions & 26 deletions be/src/vec/olap/olap_data_convertor.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -192,26 +192,43 @@ Status OlapBlockDataConvertor::OlapColumnDataConvertorBitMap::convert_to_olap()
}

assert(column_bitmap);
BitmapValue* bitmap_value_cur =
BitmapValue* bitmap_value =
const_cast<BitmapValue*>(column_bitmap->get_data().data() + _row_pos);
BitmapValue* bitmap_value_cur = bitmap_value;
BitmapValue* bitmap_value_end = bitmap_value_cur + _num_rows;

size_t total_size = 0;
if (_nullmap) {
const UInt8* nullmap_cur = _nullmap + _row_pos;
while (bitmap_value_cur != bitmap_value_end) {
if (!*nullmap_cur) {
total_size += bitmap_value_cur->getSizeInBytes();
}
++nullmap_cur;
++bitmap_value_cur;
}
} else {
while (bitmap_value_cur != bitmap_value_end) {
total_size += bitmap_value_cur->getSizeInBytes();
++bitmap_value_cur;
}
}
_raw_data.resize(total_size);

bitmap_value_cur = bitmap_value;
size_t slice_size;
size_t old_size;
char* raw_data;
char* raw_data = _raw_data.data();
Slice* slice = _slice.data();
if (_nullmap) {
const UInt8* nullmap_cur = _nullmap + _row_pos;
while (bitmap_value_cur != bitmap_value_end) {
if (!*nullmap_cur) {
slice_size = bitmap_value_cur->getSizeInBytes();
old_size = _raw_data.size();
_raw_data.resize(old_size + slice_size);

raw_data = _raw_data.data() + old_size;
bitmap_value_cur->write(raw_data);

slice->data = raw_data;
slice->size = slice_size;
raw_data += slice_size;
} else {
// TODO: this may not be neccessary, check and remove later
slice->data = nullptr;
Expand All @@ -225,14 +242,11 @@ Status OlapBlockDataConvertor::OlapColumnDataConvertorBitMap::convert_to_olap()
} else {
while (bitmap_value_cur != bitmap_value_end) {
slice_size = bitmap_value_cur->getSizeInBytes();
old_size = _raw_data.size();
_raw_data.resize(old_size + slice_size);

raw_data = _raw_data.data() + old_size;
bitmap_value_cur->write(raw_data);

slice->data = raw_data;
slice->size = slice_size;
raw_data += slice_size;

++slice;
++bitmap_value_cur;
Expand All @@ -256,26 +270,42 @@ Status OlapBlockDataConvertor::OlapColumnDataConvertorHLL::convert_to_olap() {
}

assert(column_hll);
HyperLogLog* hll_value_cur = const_cast<HyperLogLog*>(column_hll->get_data().data() + _row_pos);
HyperLogLog* hll_value = const_cast<HyperLogLog*>(column_hll->get_data().data() + _row_pos);
HyperLogLog* hll_value_cur = hll_value;
HyperLogLog* hll_value_end = hll_value_cur + _num_rows;

size_t total_size = 0;
if (nullmap) {
const UInt8* nullmap_cur = nullmap + _row_pos;
while (hll_value_cur != hll_value_end) {
if (!*nullmap_cur) {
total_size += hll_value_cur->max_serialized_size();
}
++nullmap_cur;
++hll_value_cur;
}
} else {
while (hll_value_cur != hll_value_end) {
total_size += hll_value_cur->max_serialized_size();
++hll_value_cur;
}
}
_raw_data.resize(total_size);

size_t slice_size;
size_t old_size;
char* raw_data;
char* raw_data = _raw_data.data();
Slice* slice = _slice.data();

hll_value_cur = hll_value;
if (nullmap) {
const UInt8* nullmap_cur = nullmap + _row_pos;
while (hll_value_cur != hll_value_end) {
if (!*nullmap_cur) {
slice_size = hll_value_cur->max_serialized_size();
old_size = _raw_data.size();
_raw_data.resize(old_size + slice_size);

raw_data = _raw_data.data() + old_size;
slice_size = hll_value_cur->serialize((uint8_t*)raw_data);
_raw_data.resize(old_size + slice_size);

slice->data = raw_data;
slice->size = slice_size;
raw_data += slice_size;
} else {
// TODO: this may not be neccessary, check and remove later
slice->data = nullptr;
Expand All @@ -288,16 +318,11 @@ Status OlapBlockDataConvertor::OlapColumnDataConvertorHLL::convert_to_olap() {
assert(nullmap_cur == nullmap + _row_pos + _num_rows && slice == _slice.get_end_ptr());
} else {
while (hll_value_cur != hll_value_end) {
slice_size = hll_value_cur->max_serialized_size();
old_size = _raw_data.size();
_raw_data.resize(old_size + slice_size);

raw_data = _raw_data.data() + old_size;
slice_size = hll_value_cur->serialize((uint8_t*)raw_data);
_raw_data.resize(old_size + slice_size);

slice->data = raw_data;
slice->size = slice_size;
raw_data += slice_size;

++slice;
++hll_value_cur;
Expand Down