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

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Date:   Sat, 14 Oct 2017 01:44:02 +0000
From:   "Brown, Aaron F" <aaron.f.brown@...el.com>
To:     Colin King <colin.king@...onical.com>,
        "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH][V3] e1000: avoid null pointer
 dereference    on invalid stat type

> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...osl.org] On Behalf
> Of Colin King
> Sent: Friday, September 22, 2017 10:14 AM
> To: Kirsher, Jeffrey T <jeffrey.t.kirsher@...el.com>; intel-wired-
> lan@...ts.osuosl.org; netdev@...r.kernel.org
> Cc: kernel-janitors@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [Intel-wired-lan] [PATCH][V3] e1000: avoid null pointer dereference
> on invalid stat type
> 
> From: Colin Ian King <colin.king@...onical.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@...onical.com>
> ---
>  drivers/net/ethernet/intel/e1000/e1000_ethtool.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)

Tested-by: Aaron Brown <aaron.f.brown@...el.com>