linux-kernel - Re: [PATCH] ANDROID: binder: prevent transactions into own process.

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Message-ID: <CAB0TPYF_zs=rL5qQ=C737rBVx_Z0utaihJhv9dnRqvpJ0sp7Hw@mail.gmail.com>
Date:   Wed, 28 Mar 2018 11:06:54 +0200
From:   Martijn Coenen <maco@...roid.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     John Stultz <john.stultz@...aro.org>, Todd Kjos <tkjos@...gle.com>,
        Arve Hjønnevåg <arve@...roid.com>,
        Amit Pundir <amit.pundir@...aro.org>,
        "open list:ANDROID DRIVERS" <devel@...verdev.osuosl.org>,
        Martijn Coenen <maco@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ANDROID: binder: prevent transactions into own process.

On Wed, Mar 28, 2018 at 10:19 AM, Greg KH <gregkh@...uxfoundation.org> wrote:
> Does this need to go to older kernels as well?

Yes, this should apply cleanly to 4.14 as well. It won't apply to
pre-4.14 kernels because of the fine-grained locking changes, but the
same issue exists there and I suspect it would cause the same crash.
Do you want me to send a separate patch for pre-4.14?

Also, I'm going to send a v2 for this because it can be a bit cleaner
(avoiding a deref).

Thanks,
Martijn

>
> I have a script that picks up everything the syzbot finds and tries to
> backport them, after they are applied in Linus's tree.  Might as well
> catch things before we have to rely on my script :)
>
> thanks,
>
> greg k-h