linux-kernel - Re: [PATCH V2 3/3] perf/x86/intel/uncore: Validate MMIO address before accessing

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Date:   Thu, 28 May 2020 07:02:26 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     "Liang, Kan" <kan.liang@...ux.intel.com>
Cc:     David Laight <David.Laight@...lab.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 3/3] perf/x86/intel/uncore: Validate MMIO address
 before accessing

> > > +
> > > +	pr_warn_once("perf uncore: Access invalid address of %s.\n",
> > > +		     box->pmu->type->name);
> > 
> > Pretty hard to debug without the invalid offset.
> > 
> 
> I will dump the box->io_addr and offset for debugging.

Please don't overengineer.

-Andi