Passport renewal needed while I 797 C is available

Hello there,
I have applied for U visa and my I-797 C receipt is with me. However I am out of legal status and my application is still pending. I am residing in California and waiting upon my U visa approval. Meanwhile my passport is about to expire in next 6 months. What are my options to get Indian passport while I am in USA? Also, will I -797 C suffice the need to apply for passport? If not what is the process, will I get help from Indian Embassy/ Please guide. Thank you in advance.

You can apply for passport renewal online at below link. You can call/email VFS if you have any questions.