When such right extends to causing any harm other than death is defined under section 101 of ipc. Provisions under IPC section 101 explained here:
What is Section 101 IPC:
If the offence be not of any of the descriptions enumerated in the last preceding section, the right of private defence of the body does not extend to the voluntary causing of death to the assailant, but does extend, under the restrictions mentioned in section 99, to the voluntary causing to the assailant of any harm other than death.
Section 101 IPC Explanation:
This section means except for the cirumstances mentioned under the previous section (100) private defence can extend upto causing any harm other than death, but can extend upto the conditions mentioned under section 99.