linux-kernel - Re: [PATCH] staging: speakup: fix wraparound in uaccess length check

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Date:   Sat, 7 Jul 2018 10:32:19 +0200
From:   Samuel Thibault <samuel.thibault@...-lyon.org>
To:     Jann Horn <jannh@...gle.com>
Cc:     w.d.hubbs@...il.com, chris@...-brannons.com, kirk@...sers.ca,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        speakup@...ux-speakup.org, devel@...verdev.osuosl.org
Subject: Re: [PATCH] staging: speakup: fix wraparound in uaccess length check

Jann Horn, le sam. 07 juil. 2018 10:22:52 +0200, a ecrit:
> Or should I rewrite the
> patch to be simple and just bail out on `count < 3`?

Our mails have crossed :)

I believe what I sent is correct: for softsynth it does not make sense
to have room for less than 1 (non-unicode) or 3 (unicode) bytes.

Samuel