linux-kernel - Re: [PATCH] vt: fix memory overlapping when deleting chars in the buffer

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Date:   Tue, 28 Jun 2022 16:59:22 +0800
From:   Yangxi Xiang <xyangxi5@...il.com>
To:     Jiri Slaby <jirislaby@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johan Hovold <johan@...nel.org>,
        Igor Matheus Andrade Torrente <igormtorrente@...il.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        nick black <dankamongmen@...il.com>
Subject: Re: [PATCH] vt: fix memory overlapping when deleting chars in the buffer

>> Both of them works, and I pick one of them.
>
> Sorry, I don't understand.

We can use both scr_memcpyw() and scr_memmovew() for the not
overlapping case (cp <= nr), which is more likely to happen.
In this case I keep using scr_memcpyw().

Yangxi Xiang