linux-kernel - Re: [PATCH v4 3/4] sched_setattr: switch to copy_struct_from

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Message-ID: <20191001023300.2melco5qvojypsup@wittgenstein>
Date:   Tue, 1 Oct 2019 04:33:01 +0200
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     Aleksa Sarai <cyphar@...har.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        libc-alpha@...rceware.org, linux-api@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/4] sched_setattr: switch to copy_struct_from_user()

On Tue, Oct 01, 2019 at 11:10:54AM +1000, Aleksa Sarai wrote:
> The change is very straightforward, and helps unify the syscall
> interface for struct-from-userspace syscalls. Ideally we could also
> unify sched_getattr(2)-style syscalls as well, but unfortunately the
> correct semantics for such syscalls are much less clear (see [1] for
> more detail). In future we could come up with a more sane idea for how
> the syscall interface should look.
> 
> [1]: commit 1251201c0d34 ("sched/core: Fix uclamp ABI bug, clean up and
>      robustify sched_read_attr() ABI logic and code")
> 
> Reviewed-by: Kees Cook <keescook@...omium.org>
> Signed-off-by: Aleksa Sarai <cyphar@...har.com>

Reviewed-by: Christian Brauner <christian.brauner@...ntu.com>