>> Can a passed null pointer really work in this function? >> >> https://elixir.bootlin.com/linux/v4.16-rc2/source/include/crypto/hash.h#L684 >> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/crypto/hash.h?id=0f9da844d87796ac31b04e81ee95e155e9043132#n751 >> >> static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm) >> { >> return &tfm->base; >> } > > Yes. It's not a dereference, Do any processors treat the zero address still special there? > it's just doing pointer math to get the address. Can eventually happen anything unexpected? Can it be nicer to avoid such a software behaviour concern generally just by adjusting a few jump labels (as I proposed it)? Regards, Markus
