Re: [Xen-devel] Null-pointer access in netback_uevent

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

On 05/28/2010 02:03 AM, Bastian Blank wrote:
> On Fri, May 28, 2010 at 10:47:48AM +1000, James Harper wrote:
>   
>>>> I noticed this just after I posted (subject "oops starting domain on 4.0.0
>>>> + 2.6.32.13-gf6fe658"). I'm getting the same error.
>>>>         
>>> Actually my error is occurring because 'be' is NULL in netback_uevent (eg
>>> dev_get_drvdata returns NULL)
>>>       
>> Looking into this further, I suspect that the trigger here is a newer 
>> version of udev or something in that area. netback_uevent is getting called 
>> before the call to netback_probe containing the call to dev_set_drvdata.
>>     
> There are two problems there. And yes, the uevent routine can be called
> at any time.
>   

So would it be correct for it to just return if either of those are
NULL?  Will it get called again later once the device info is available?

    J

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