linux-kernel - Re: [PATCH] misc/vmw_vmci: bail out earlier on too big queue allocation

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Message-ID: <X9EaIdgBeU/QBazh@kroah.com>
Date:   Wed, 9 Dec 2020 19:40:33 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     nslusarek@....net
Cc:     jhansen@...are.com, arnd@...db.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] misc/vmw_vmci: bail out earlier on too big queue
 allocation

On Sun, Nov 22, 2020 at 06:40:57PM +0100, nslusarek@....net wrote:
> From: Norbert Slusarek <nslusarek@....net>
> Date: Sun, 22 Nov 2020 19:16:41 +0100
> Subject: [PATCH] misc/vmw_vmci: bail out earlier on too big queue allocation
> 
> For the allocation of a queue pair in qp_host_alloc_queue() an arbitrary value can be
> passed for produce_size, which can lead to miscalculation of memory we'd like to allocate
> in one take. A warning is triggered at __alloc_pages_nodemask() in mm/page_alloc.c:4737
> which aborts the false allocation, but it results in a VMware machine freezing
> for an infinite time.
> 
> Signed-off-by: Norbert Slusarek <nslusarek@....net>
> 

<snip>

Can you resend this in a non-html format, so that we can apply it, and
so it will show up on the public mailing lists?

thanks,

greg k-h