linux-kernel - Re: [PATCH] xen-swiotlb: use actually allocated size on check physical contiguous

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Date:   Tue, 4 Sep 2018 21:13:30 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Joe Jin <joe.jin@...cle.com>
Cc:     Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        John Sobecki <john.sobecki@...cle.com>,
        "DONGLI.ZHANG" <dongli.zhang@...cle.com>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH] xen-swiotlb: use actually allocated size on check
 physical contiguous

On Tue, Sep 04, 2018 at 11:16:58AM -0700, Joe Jin wrote:
> xen_swiotlb_{alloc,free}_coherent() actually allocate/free size by order
> but used the required size to check if address is physical contiguous,
> if first pages are physical contiguous also passed
> range_straddles_page_boundary() check, but others were not it will
> lead kernel panic.
> 
> Signed-off-by: Joe Jin <joe.jin@...cle.com>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> ---
>  drivers/xen/swiotlb-xen.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 

<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>