* Re: Race condition in kobject_get_path()
[not found] <abc55eae-1e78-4389-e60c-db984ad8ed50@quicinc.com>
@ 2022-03-30 9:22 ` Greg KH
2022-03-30 9:24 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Greg KH @ 2022-03-30 9:22 UTC (permalink / raw)
To: Mukesh Ojha; +Cc: Rafael J. Wysocki, linux-kernel
On Wed, Mar 30, 2022 at 02:47:20PM +0530, Mukesh Ojha wrote:
> Hi All,
>
> We are facing one issue where one driver is trying to register its device
> from driver probe
> and from another path dev_set_name() done from driver probe of the added
> device whose
> length can be more than earlier which could result in redzone overwritten
> issue.
What drivers are doing this so we can see the code? This should be
happening in order and not at the same time.
>
> Can we get your suggestion here ? is this case of a race here ?
>
>
> p1 p2
>
> *kobject_get_path* <https://opengrok.qualcomm.com/source/s?refs=kobject_get_path&project=KERNEL.PLATFORM.1.0>
>
>
> => get_kobj_path_length (length is calculated
> from this path)
> dev_set_name(same dev name)
> => fill_kobj_path (path is copied here)
I do not understand this trace, sorry. What code are you referring to?
confused,
greg k-h
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Race condition in kobject_get_path()
2022-03-30 9:22 ` Race condition in kobject_get_path() Greg KH
@ 2022-03-30 9:24 ` Greg KH
0 siblings, 0 replies; 2+ messages in thread
From: Greg KH @ 2022-03-30 9:24 UTC (permalink / raw)
To: Mukesh Ojha; +Cc: Rafael J. Wysocki, linux-kernel
On Wed, Mar 30, 2022 at 11:22:59AM +0200, Greg KH wrote:
> On Wed, Mar 30, 2022 at 02:47:20PM +0530, Mukesh Ojha wrote:
> > Hi All,
> >
> > We are facing one issue where one driver is trying to register its device
> > from driver probe
> > and from another path dev_set_name() done from driver probe of the added
> > device whose
> > length can be more than earlier which could result in redzone overwritten
> > issue.
>
> What drivers are doing this so we can see the code? This should be
> happening in order and not at the same time.
>
> >
> > Can we get your suggestion here ? is this case of a race here ?
> >
> >
> > p1 p2
> >
> > *kobject_get_path* <https://opengrok.qualcomm.com/source/s?refs=kobject_get_path&project=KERNEL.PLATFORM.1.0>
> >
> >
> > => get_kobj_path_length (length is calculated
> > from this path)
> > dev_set_name(same dev name)
> > => fill_kobj_path (path is copied here)
>
> I do not understand this trace, sorry. What code are you referring to?
Also, the above link does not work for me :(
^ permalink raw reply [flat|nested] 2+ messages in thread
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