Re: [PATCH] kernel/sys.c: fix and improve control flow in __sys_setres[ug]id()

Andrew Morton [off-list ref] writes:

On Wed, 15 Feb 2023 14:18:07 +0100 Ondrej Mosnacek [off-list ref] wrote:

quoted

1. First determine if CAP_SET[UG]ID is required and only then call
   ns_capable_setid(), to avoid bogus LSM (SELinux) denials.

Can we please have more details on the selinux failures?  Under what
circumstances?  What is the end-user impact?

It is puzzling the structure with having the capability check first
dates to 2.1.104 (when a hand coded test for root was replaced
with capable(CAP_SETID).  Which means the basic structure and logic
of the code is even older than that.

Eric