linux-kernel - Re: [PATCH] xhci-ring: Fix Null pointer dereference

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Message-ID: <CAPybu_3jtJDXw1rJOQVoc2G9UmDXqeaLW-aNvfO=y306XQoXjQ@mail.gmail.com>
Date:	Mon, 1 Sep 2014 12:26:51 +0200
From:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:	Mathias Nyman <mathias.nyman@...el.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux USB Mailing List <linux-usb@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] xhci-ring: Fix Null pointer dereference

Well, it is hard to say. rc2 without the patch showed more warnings,
but never crashed badly (queuecommand_lck....).

The sample size is not big enough. maybe rc2 also has the
queuecommand_lck bug, but I havent hit it.

On Mon, Sep 1, 2014 at 12:37 PM, Mathias Nyman <mathias.nyman@...el.com> wrote:
> On 09/01/2014 12:36 PM, Ricardo Ribalda Delgado wrote:
>> After some time of use (one hour or so) my system started to behave
>> "weird". I did check  dmesg and I was receiving the following line
>> again and again:
>>
>> usb-storage: Error in queuecommand_lck: us->sfb= ffff8805bd61ccc0
>>
>> I did disconnect the usb device and the whole computer crashed :S
>>
>
> Ok, thanks.
>
> Would you say things work better after the patch?
>
> I still think the patch solves part of the issue, i.e. how we handle halted endpoints
> in reset, but I don't know the reason why the endpoints stall in the first place
>
> -Mathias
>
>



-- 
Ricardo Ribalda
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