linux-kernel - Re: [PATCH] scsi: bnx2fc: fix incorrect cast to u64 on shift operation

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Message-ID: <yq18sv9dkox.fsf@oracle.com>
Date:   Tue, 14 May 2019 13:12:30 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Colin King <colin.king@...onical.com>
Cc:     QLogic-Storage-Upstream@...gic.com,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: bnx2fc: fix incorrect cast to u64 on shift operation


Colin,

> Currently an int is being shifted and the result is being cast to a
> u64 which leads to undefined behaviour if the shift is more than 31
> bits. Fix this by casting the integer value 1 to u64 before the shift
> operation.

Applied to 5.2/scsi-fixes, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering