Re: [PATCH v2] HID: core: demote warning to debug level

[Lee Jones <lee@kernel.org>]

On Wed, 10 Jun 2026, Jiri Kosina wrote:

> On Sat, 23 May 2026, Matteo Croce wrote:
> 
> > From: Matteo Croce <teknoraver@meta.com>
> > 
> > The log level for short  messages was changed from debug to warning,
> > flooding syslog on systems with devices that regularly send
> > short reports, in my case an UPS:
> > 
> >     $ dmesg |grep -c 'Event data for report .* was too short'
> >     35
> > 
> > Demote it back to debug level.
> > 
> > Fixes: 0a3fe972a7cb ("HID: core: Mitigate potential OOB by removing bogus memset()")
> > Signed-off-by: Matteo Croce <teknoraver@meta.com>
> 
> Applied, thanks.

FWIW, I'd like to contest this patch.

The warning is real.  It means that the HID report was rejected and as
such something on the system will be now be non-functional.  Silencing
the warning is not helpful.  It does not fix the issue, and now the user
/ admin has no idea that its even happening.

This warning has caught a bunch of genuine issues related to testing
infrastructure and incorrectly coded firmware that have subsequently
been rectified.

Please don't hide this issue.  Fix the root cause instead.

-- 
Lee Jones