Re: [PATCH] HID: logitech-dj: fix wrong detection of bad DJ_SHORT output report

[Lee Jones <lee@kernel.org>]

On Fri, 10 Apr 2026, Jiri Kosina wrote:

> On Fri, 10 Apr 2026, Benjamin Tissoires wrote:
> 
> > commit b6a57912854e ("HID: logitech-dj: Prevent REPORT_ID_DJ_SHORT
> > related user initiated OOB write") assumed that all HID devices attached
> > to the logitech-dj driver was having an output report of DJ_SHORT.
> > 
> > However, on the receiver itself, we have 2 other HID device we attach
> > here: the mouse emulation and the keyboard emulation. For those devices
> > the value of rep is NULL and we are triggered a segfault here.
> > 
> > This is doubly required because logitech-dj also handles non DJ devices
> > that might not have the DJ collection.
> > 
> > Fixes: b6a57912854e ("HID: logitech-dj: Prevent REPORT_ID_DJ_SHORT related user initiated OOB write")
> > Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
> 
> Thanks a lot Benjamin, your CI be praised!

Thanks Benjamin.  I appreciate your work.

If it's not too late:

  Reviewed-by: Lee Jones <lee@kernel.org>

-- 
Lee Jones [李琼斯]