[PATCH 2/5] exec: Directly call security_bprm_set_creds from __do_execve_file

Linus Torvalds torvalds at linux-foundation.org
Sat May 9 20:07:48 UTC 2020

On Sat, May 9, 2020 at 12:44 PM Eric W. Biederman <ebiederm at xmission.com> wrote:
> Now that security_bprm_set_creds is no longer responsible for calling
> cap_bprm_set_creds, security_bprm_set_creds only does something for
> the primary file that is being executed (not any interpreters it may
> have).  Therefore call security_bprm_set_creds from __do_execve_file,
> instead of from prepare_binprm so that it is only called once, and
> remove the now unnecessary called_set_creds field of struct binprm.

Ahh, good, this patch removes the 'called_set_creds' logic from the
security subsystems.

So it does half of what I asked for: please also just rename that
"security_bprm_set_creds()" to be "security_primary_bprm_set_creds()"
so that the change of semantics also shows up that way.

And so that there is no confusion about the fact that
"cap_bprm_set_creds()" has absolutely nothing to do with
"security_bprm_set_creds()" any more.


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