From: Dan Carpenter <dan.carpenter@oracle.com>
To: Dan Murphy <dmurphy@ti.com>
Cc: Colin King <colin.king@canonical.com>,
Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, kernel-janitors@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH][next] net: phy: dp83869: fix unsigned comparisons against less than zero values
Date: Tue, 6 Oct 2020 21:26:28 +0300 [thread overview]
Message-ID: <20201006182628.GI4282@kadam> (raw)
In-Reply-To: <1ffbf497-cb07-4302-8a79-236338f00383@ti.com>
On Fri, Oct 02, 2020 at 12:26:49PM -0500, Dan Murphy wrote:
> Colin
>
> On 10/2/20 11:54 AM, Colin King wrote:
> > From: Colin Ian King <colin.king@canonical.com>
> >
> > Currently the comparisons of u16 integers value and sopass_val with
> > less than zero for error checking is always false because the values
> > are unsigned. Fix this by making these variables int. This does not
> > affect the shift and mask operations performed on these variables
> >
> > Addresses-Coverity: ("Unsigned compared against zero")
> > Fixes: 49fc23018ec6 ("net: phy: dp83869: support Wake on LAN")
> > Signed-off-by: Colin Ian King <colin.king@canonical.com>
> > ---
> > drivers/net/phy/dp83869.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/phy/dp83869.c b/drivers/net/phy/dp83869.c
> > index 0aee5f645b71..cf6dec7b7d8e 100644
> > --- a/drivers/net/phy/dp83869.c
> > +++ b/drivers/net/phy/dp83869.c
> > @@ -305,7 +305,7 @@ static int dp83869_set_wol(struct phy_device *phydev,
> > static void dp83869_get_wol(struct phy_device *phydev,
> > struct ethtool_wolinfo *wol)
> > {
> > - u16 value, sopass_val;
> > + int value, sopass_val;
> > wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC |
> > WAKE_MAGICSECURE);
>
> Wonder why this was not reported before as the previous comparison issue
> reported by zero day.
It was reported on Sep 25. I forward those zero day bot emails.
https://lore.kernel.org/lkml/20200925123858.GX18329@kadam/
regards,
dan carpenter
next prev parent reply other threads:[~2020-10-06 18:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-02 16:54 [PATCH][next] net: phy: dp83869: fix unsigned comparisons against less than zero values Colin King
2020-10-02 17:26 ` Dan Murphy
2020-10-02 17:39 ` Andrew Lunn
2020-10-06 18:26 ` Dan Carpenter [this message]
2020-10-04 0:09 ` David Miller
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