netdev - Re: [PATCH][next] net: aquantia: fix unintention integer overflow on left shift

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Message-Id: <20191029.104814.1303198183585893748.davem@davemloft.net>
Date:   Tue, 29 Oct 2019 10:48:14 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     colin.king@...onical.com
Cc:     epomozov@...vell.com, igor.russkikh@...antia.com,
        dmitry.bezrukov@...antia.com, sergey.samoilenko@...antia.com,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] net: aquantia: fix unintention integer overflow
 on left shift

From: Colin King <colin.king@...onical.com>
Date: Fri, 25 Oct 2019 12:58:11 +0100

> From: Colin Ian King <colin.king@...onical.com>
> 
> Shifting the integer value 1 is evaluated using 32-bit
> arithmetic and then used in an expression that expects a 64-bit
> value, so there is potentially an integer overflow. Fix this
> by using the BIT_ULL macro to perform the shift and avoid the
> overflow.
> 
> Addresses-Coverity: ("Unintentional integer overflow")
> Fixes: 04a1839950d9 ("net: aquantia: implement data PTP datapath")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Applied.