Re: [PATCH] net: tls: Fix possible NULL-pointer dereference in tls_decrypt_device() and tls_decrypt_sw()

From: Jakub Kicinski
Date: Wed Oct 25 2023 - 17:31:00 EST


On Wed, 25 Oct 2023 23:20:23 +0200 Sabrina Dubroca wrote:
> There's already a comment above tls_decrypt_sg that (pretty much) says
> out_iov is only used in zero-copy mode.
>
> * [...] The input parameter 'darg->zc' indicates if
> * zero-copy mode needs to be tried or not. With zero-copy mode, either
> * out_iov or out_sg must be non-NULL.
>
> Do we need another just above the call to tls_decrypt_sg?

Sounds good. Right next to a line of code that people will try to
modify when whatever static checker they have tells them this is
buggy :S Call site of tls_decrypt_sg() seems like a good bet.