[lvc-project] [PATCH] platform/x86: intel_telemetry: initialize default trace verbosity

[Fedor Pchelkin]

On Mon, 14. Sep 12:43, Aleksandrova Alyona wrote:
> telemetry_def_get_trace_verbosity() returns success without initializing
> the output verbosity value.
> 
> The default telemetry operations are installed when the core driver is
> initialized and again by telemetry_clear_pltdata() when the platform
> driver is removed. The telemetry debugfs files can remain available after
> the platform driver removal.
> 
> A subsequent read of pss_trace_verbosity or ioss_trace_verbosity calls
> telemetry_get_trace_verbosity(), which may use the default callback and
> return success without setting verbosity. The uninitialized value is then
> passed to seq_printf().
> 
> Validate the output pointer and initialize the default verbosity to zero
> so callers never use an uninitialized value after a successful call.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 378f956e3f93 ("platform/x86: Add Intel Telemetry Core Driver")
> Signed-off-by: Aleksandrova Alyona <aga at itb.spb.ru>
> ---
>  drivers/platform/x86/intel_telemetry_core.c | 4 ++++

Если готовите патч под апстрим, просьба это делать поверх актуального
состояния master ветки, а не 5.10.  В master другой путь у затрагиваемого
файла.