netdev - Re: [PATCH net,stable] net: cdc_ether: fix divide by 0 on bad descriptors

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Message-ID: <1509978940.2024.34.camel@suse.com>
Date:   Mon, 06 Nov 2017 15:35:40 +0100
From:   Oliver Neukum <oneukum@...e.com>
To:     Bjørn Mork <bjorn@...k.no>,
        netdev@...r.kernel.org
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>, syzkaller@...glegroups.com,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH net,stable] net: cdc_ether: fix divide by 0 on bad
 descriptors

Am Montag, den 06.11.2017, 15:37 +0100 schrieb Bjørn Mork :
> Setting dev->hard_mtu to 0 will cause a divide error in
> usbnet_probe. Protect against devices with bogus CDC Ethernet
> functional descriptors by ignoring a zero wMaxSegmentSize.
> 
> Signed-off-by: Bjørn Mork <bjorn@...k.no>
Acked-by: Oliver Neukum <oneukum@...e.com>