Re: [0/8] target-iSCSI: Adjustments for several function implementations

SF Markus Elfring
2018-02-23T11:50:50Z

>> 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\x0f9da844d87796ac31b04e81ee95e155e9043132#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