linux-kernel - Re: [PATCH 1/5] usb: mtu3: fix coverity of string buffer

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Message-ID: <YsvHD6dpU3O7gQD4@kroah.com>
Date:   Mon, 11 Jul 2022 08:45:35 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Felipe Balbi <balbi@...nel.org>,
        Eddie Hung <eddie.hung@...iatek.com>
Subject: Re: [PATCH 1/5] usb: mtu3: fix coverity of string buffer

On Mon, Jul 11, 2022 at 02:39:10PM +0800, Chunfeng Yun wrote:
> On Fri, 2022-07-08 at 09:26 +0200, Greg Kroah-Hartman wrote:
> > On Fri, Jul 08, 2022 at 03:18:59PM +0800, Chunfeng Yun wrote:
> > > Use snprintf instead of sprintf which could cause buffer overflow.
> > 
> > How can it cause an overflow?
> Maybe I didn't describe it clearly, this patch is used to fix coverity
> check warning of string buffer, in fact no overflow happens.

Then perhaps the coverity warning is useless and
yet-another-false-positive that that tool is known to spit out?

Don't make code changes just because broken tools say to do so.

thanks,

greg k-h