[Intel-wired-lan] [PATCH][V3] e1000: avoid null pointer dereference on invalid stat type

[Brown, Aaron F]

> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at osuosl.org] On Behalf
> Of Colin King
> Sent: Friday, September 22, 2017 10:14 AM
> To: Kirsher, Jeffrey T <jeffrey.t.kirsher at intel.com>; intel-wired-
> lan at lists.osuosl.org; netdev at vger.kernel.org
> Cc: kernel-janitors at vger.kernel.org; linux-kernel at vger.kernel.org
> Subject: [Intel-wired-lan] [PATCH][V3] e1000: avoid null pointer dereference
> on invalid stat type
> 
> From: Colin Ian King <colin.king at canonical.com>
> 
> Currently if the stat type is invalid then data[i] is being set
> either by dereferencing a null pointer p, or it is reading from
> an incorrect previous location if we had a valid stat type
> previously.  Fix this by skipping over the read of p on an invalid
> stat type.
> 
> Detected by CoverityScan, CID#113385 ("Explicit null dereferenced")
> 
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> ---
>  drivers/net/ethernet/intel/e1000/e1000_ethtool.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)

Tested-by: Aaron Brown <aaron.f.brown at intel.com>