Re: [PATCH net] tun: fix recovery from gup errors

[Neil Horman]

On Sun, Jun 23, 2013 at 05:19:03PM +0300, Michael S. Tsirkin wrote:
> get user pages might fail partially in tun zero copy
> mode. To recover we need to put all pages that we got,
> but code used a wrong index resulting in double-free
> errors.
> 
> Reported-by: Brad Hubbard <bhubbard@xxxxxxxxxx>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
> ---
> 
> I haven't figured out why do we get failures,
> but recovery is clearly wrong.
> 
> This is also -stable material.
> 
>  drivers/net/tun.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx>

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