Re: [PATCH] macvtap: fix TUNSETSNDBUF values > 64k

[David Miller]

From: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Date: Fri, 18 Sep 2015 13:41:09 +0300

> Upon TUNSETSNDBUF,  macvtap reads the requested sndbuf size into
> a local variable u.
> commit 39ec7de7092b ("macvtap: fix uninitialized access on
> TUNSETIFF") changed its type to u16 (which is the right thing to
> do for all other macvtap ioctls), breaking all values > 64k.
> 
> The value of TUNSETSNDBUF is actually a signed 32 bit integer, so
> the right thing to do is to read it into an int.
> 
> Cc: David S. Miller <davem@xxxxxxxxxxxxx>
> Fixes: 39ec7de7092b ("macvtap: fix uninitialized access on TUNSETIFF")
> Reported-by: Mark A. Peloquin
> Bisected-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxxxxxxx>
> Reported-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>

Applied and queued up for -stable, thanks.
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