linux-kernel - Re: general protection fault in __handle_mm

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Message-ID: <20181009170517.GA2821@splinter>
Date:   Tue, 9 Oct 2018 20:05:17 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>, aneesh.kumar@...ux.ibm.com,
        syzbot+1577fbe983d20fe2e88f@...kaller.appspotmail.com,
        David Miller <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        LKML <linux-kernel@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        syzkaller-bugs@...glegroups.com,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kirill.shutemov@...ux.intel.com
Subject: Re: general protection fault in __handle_mm_fault

On Tue, Oct 09, 2018 at 12:02:58PM -0400, Willem de Bruijn wrote:
> On Tue, Oct 9, 2018 at 11:00 AM Eric Dumazet <eric.dumazet@...il.com> wrote:
> > Well, this is a C repro, you can test this yourself instead of asking Willem who
> > already did a painful bisection.
> 
> Thanks Eric. It does take some effort to get the syzkaller environment
> up and running [1] and I happen to have it ready, so I don't mind testing
> a few patches.

It is possible to ask syzbot to test the patch. I sent a couple of
patches and got a response in 20-30 minutes. Very convenient.

It is mentioned at the bottom of the report:

"
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
"