linux-kernel - Re: [PATCH] usb: storage: sddr55: avoid integer overflow

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Message-ID: <53bc0584-51eb-8bb7-de48-ca07fccafc19@gmail.com>
Date:   Mon, 6 Feb 2023 23:04:54 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...il.com>
To:     Alan Stern <stern@...land.harvard.edu>,
        Karina Yankevich <k.yankevich@....ru>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, usb-storage@...ts.one-eyed-alien.net,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH] usb: storage: sddr55: avoid integer overflow

Hello!

On 2/3/23 11:48 PM, Alan Stern wrote:
[...]
>> We're possibly losing information by shifting an int.
>> Fix it by adding the necessary cast.
> 
> Nonsense.  The card's _total_ capacity is no larger than 128 MB, so a 
> page address can't possibly overflow an int.

   Then the 'address' variables shouldn't be declared *unsigned long*, right?
That should fix the SVACE's report as well. Would you accept such a patch?

> Alan Stern

[...]

MBR, Sergey