hardfault erros

i m using freertos on stm32f103. i m getting hardfault exception when i debug.
what should i do now

hardfault erros

That is very, very little information to provide to expect a useful reply.  All I can suggest is that you start by making sure you have read the documentation – starting with the documentation page for the demo you are using (or started with), and then the FAQ:  http://www.freertos.org/FAQHelp.html Regards.