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[fix](BufferedReader) fix BufferedReader::_read_once call memcpy function using null pointor _buffer #27775

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merged 1 commit into from
Mar 15, 2024
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[fix](BufferedReader) fix BufferedReader::_read_once call memcpy function using null pointor _buffer #27775

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7 changes: 7 additions & 0 deletions be/src/io/buffered_reader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -132,8 +132,15 @@ Status BufferedReader::_read_once(int64_t position, int64_t nbytes, int64_t* byt
return Status::OK();
}
}

int64_t len = std::min(_buffer_limit - position, nbytes);
int64_t off = position - _buffer_offset;
if (_buffer == nullptr || out == nullptr || off + len > _buffer_size) {
return Status::BufferAllocFailed(
"BufferedReader copy argument invaild: _buffer:{},\
out:{},_buffer_size:{},off:{},len:{}",
_buffer, out, _buffer_size, off, len);
}
memcpy(out, _buffer + off, len);
*bytes_read = len;
_cur_offset = position + *bytes_read;
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