linux-kernel - Re: fanotify use after free.

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Message-ID: <CA+55aFwzb7rJate=r0Sgi_N7FStNtJS_PvfgPSGaczPPgeUZvg@mail.gmail.com>
Date:	Wed, 22 Jan 2014 16:08:52 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Jan Kara <jack@...e.cz>
Cc:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Jiri Kosina <jkosina@...e.cz>
Subject: Re: fanotify use after free.

On Wed, Jan 22, 2014 at 3:36 PM, Jan Kara <jack@...e.cz> wrote:
>
> But refcounting seems like an overkill for this - there is exactly one
> fanotify_response_event structure iff it is a permission event. So
> something like the (completely untested) attached patch should fix the
> problem. But I agree it's a bit ugly so we might want something different.
> I'll try to think about something better tomorrow.

Ok, In the meantime, Dave, can you verify whether this hacky patch
fixes your problem?

              Linus
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