linux-kernel - Re: WARNING in arch_install_hw

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Message-ID: <20191210092300.kigvxforfirpqitc@wittgenstein>
Date:   Tue, 10 Dec 2019 10:23:01 +0100
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     syzbot <syzbot+370a6b0f11867bf13515@...kaller.appspotmail.com>,
        acme@...nel.org, akpm@...ux-foundation.org, arnd@...db.de,
        bp@...en8.de, bp@...e.de, christian@...uner.io, cyphar@...har.com,
        dhowells@...hat.com, dvyukov@...gle.com, ebiederm@...ssion.com,
        frederic@...nel.org, gustavo@...eddedor.com, hpa@...or.com,
        jannh@...gle.com, jolsa@...hat.com, linux-kernel@...r.kernel.org,
        luto@...nel.org, mark.rutland@....com, mhiramat@...nel.org,
        mingo@...nel.org, mingo@...hat.com, mtk.manpages@...il.com,
        namhyung@...nel.org, oleg@...hat.com, peterz@...radead.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        torvalds@...ux-foundation.org, viro@...iv.linux.org.uk,
        x86@...nel.org
Subject: Re: WARNING in arch_install_hw_breakpoint

On Mon, Dec 09, 2019 at 04:10:13PM -0800, Kees Cook wrote:
> On Sun, Dec 08, 2019 at 07:33:00AM -0800, syzbot wrote:
> > syzbot suspects this bug was fixed by commit:
> > 
> > commit b3e5838252665ee4cfa76b82bdf1198dca81e5be
> > Author: Christian Brauner <christian@...uner.io>
> > Date:   Wed Mar 27 12:04:15 2019 +0000
> > 
> >     clone: add CLONE_PIDFD
> 
> That seems ... unlikely? I suspect this WARN should just be pr_err or

Very much so. :)

Christian