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Date: Mon, 27 Nov 2023 18:47:41 +0000
From: Greg KH <gregkh@linuxfoundation.org>
To: Hagar Gamal Halim Hemdan <hagarhem@amazon.com>
Cc: stable@vger.kernel.org
Subject: Re: [PATCH] vmci: prevent speculation leaks by sanitizing event in
 event_deliver()
Message-ID: <2023112728-footless-overkill-3732@gregkh>
References: <20231127183745.94955-1-hagarhem@amazon.com>
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In-Reply-To: <20231127183745.94955-1-hagarhem@amazon.com>

On Mon, Nov 27, 2023 at 06:37:45PM +0000, Hagar Gamal Halim Hemdan wrote:
> Coverity spotted that event_msg is controlled by user-space,
> event_msg->event_data.event is passed to event_deliver() and used
> as an index without sanitization.
> 
> This change ensures that the event index is sanitized to mitigate any
> possibility of speculative information leaks.
> 
> Fixes: 1d990201f9bb ("VMCI: event handling implementation")
> 
> Signed-off-by: Hagar Gamal Halim Hemdan <hagarhem@amazon.com>
> ---
>  drivers/misc/vmw_vmci/vmci_event.c | 6 +++++-
:  1 file changed, 5 insertions(+), 1 deletion(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>