linux-kernel - Re: [mdiobus_free] BUG: KASAN: slab-out-of-bounds in _copy_from

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Message-ID: <CA+55aFz2jUuebxfVzMThucPbLhsQHWP-hy4VeM5+oMtxwUz8gA@mail.gmail.com>
Date:   Tue, 7 Nov 2017 08:04:25 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Fengguang Wu <fengguang.wu@...el.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Roger Quadros <rogerq@...com>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Uwe Kleine-König <uwe@...ine-koenig.org>,
        Jon Mason <jon.mason@...adcom.com>,
        Fabio Estevam <fabio.estevam@....com>,
        Network Development <netdev@...r.kernel.org>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: Re: [mdiobus_free] BUG: KASAN: slab-out-of-bounds in _copy_from_user+0x5d/0x8f

On Tue, Nov 7, 2017 at 4:15 AM, Fengguang Wu <fengguang.wu@...el.com> wrote:
> Sorry please ignore this report -- according to Andrey, old gcc may
> well generate false KASAN reports.

Oh wow, this gcc is even older than the other one that caused slob problems..

>> Linux version 4.14.0-rc8 (kbuild@...el11) (gcc version 4.6.4 (Debian 4.6.4-7))

Yeah, please do upgrade your compilers to something from this decade.

          Linus