Re: [uio] panic in name_show()
- Date: Fri, 11 Aug 2017 13:54:42 -0700
- From: Francesco Ruggeri <fruggeri@xxxxxxxxxx>
- Subject: Re: [uio] panic in name_show()
On Fri, Aug 11, 2017 at 11:29 AM, Francesco Ruggeri <fruggeri@xxxxxxxxxx> wrote:
> I have run into this panic while some devices were being hotunplugged,
> and I am able to easily reproduce it with the attached module, which
> creates a dummy uio device (in my case /sys/class/uio/uio74).
> The panic is the result of a race between uio_unregister_device(),
> which sets idev->info to NULL,
Never mind. The code that is setting idev->info to NULL is coming from
a non-standard driver.
Sorry for the noise.
> and name_show() which dereferences it.
> Seen in 4.9, 3.18 and 3.4.
> Francesco Ruggeri