Re: [RFC] call_with_creds()

[David Howells]

Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> and then read/write/open could just inc/dec the cred_poison counter
> (when the debug option is set).

As I may have said, I have tried modifying the kernel to pass the cred pointer
down.  The drivers and ioctl() implementations are/were particularly nasty in
this respect.  So many of them were doing checks against the current thread,
not f_cred.

I think I need to work out some way to automate the process of adding in the
extra parameter as it's not something that I think can be trivially done with
coccinelle.

David