linux-kernel - Re: UBSAN: Undefined behaviour in linux-4.7.2/drivers/usb/core/devio.c:1713:25

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Message-ID: <Pine.LNX.4.44L0.1608231457400.2093-100000@iolanthe.rowland.org>
Date:   Tue, 23 Aug 2016 14:58:36 -0400 (EDT)
From:   Alan Stern <stern@...land.harvard.edu>
To:     Vittorio Zecca <zeccav@...il.com>
cc:     Bjørn Mork <bjorn@...k.no>,
        Jiri Slaby <jslaby@...e.cz>, <stable@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: UBSAN: Undefined behaviour in linux-4.7.2/drivers/usb/core/devio.c:1713:25

On Tue, 23 Aug 2016, Vittorio Zecca wrote:

> After applying the patch above the UBSAN issue in devio.c disappeared.
> 
> However, I got the following messages in dmesg, probably due to a NetworkManager
> malfunctioning, and if I click on the NetworkManager icon I get
> "NetworkManager is not running"
> but maybe this is another issue and your patch did solve the devio.c problem.
> Unfortunately I cannot use the 4.7.2 kernel with ubsan and asan because
> I need the networkmanager running, as it is doing now on kernel version 4.6.6

The NetworkManager problem does look like something completely 
separate.

So thanks for testing the patch, and I will submit it soon.

Alan Stern