I took Seacord's virtual class (CMU SEI? Can't remember) on Secure C coding a few years back and own, love, and regularly use the The CERT C Secure Coding Standard.
I learned from K&R, but highly recommend Seacord's books if you're looking for how to write secure C and a more modern take on some of the trickier parts of C.
I learned from K&R, but highly recommend Seacord's books if you're looking for how to write secure C and a more modern take on some of the trickier parts of C.