linux-kernel - Re: [PATCH v8 09/28] x86/insn-eval: Do not BUG on invalid register type

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Message-ID: <1504816041.30780.8.camel@linux.intel.com>
Date:   Thu, 07 Sep 2017 13:27:21 -0700
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Borislav Petkov <bp@...e.de>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Brian Gerst <brgerst@...il.com>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Huang Rui <ray.huang@....com>, Jiri Slaby <jslaby@...e.cz>,
        Jonathan Corbet <corbet@....net>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Chen Yucong <slaoub@...il.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        x86@...nel.org, Adam Buchbinder <adam.buchbinder@...il.com>,
        Colin Ian King <colin.king@...onical.com>,
        Lorenzo Stoakes <lstoakes@...il.com>,
        Qiaowei Ren <qiaowei.ren@...el.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Kees Cook <keescook@...omium.org>,
        Thomas Garnier <thgarnie@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH v8 09/28] x86/insn-eval: Do not BUG on invalid register
 type

On Thu, 2017-09-07 at 19:54 +0200, Borislav Petkov wrote:
> 
> Also, I meant to add it to pr_fmt. Feel free to merge this hunk ontop
> of
> yours:
> 
> ---
> diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
> index 3919458fecbf..d46034ddfbb7 100644
> --- a/arch/x86/lib/insn-eval.c
> +++ b/arch/x86/lib/insn-eval.c
> @@ -10,6 +10,9 @@
>  #include <asm/insn.h>
>  #include <asm/insn-eval.h>
>  
> +#undef pr_fmt
> +#define pr_fmt(fmt) "insn: " fmt
> +
>  enum reg_type {
>         REG_TYPE_RM = 0,
>         REG_TYPE_INDEX,
> @@ -86,7 +89,7 @@ static int get_reg_offset(struct insn *insn, struct
> pt_regs *regs,
>                 break;
>  
>         default:
> -               pr_err_ratelimited("insn: x86: invalid register
> type");
> +               pr_err_ratelimited("invalid register type: %d\n",
> type);
>                 return -EINVAL;
>         }
>  

Oh, I didn't understand your comment initially. Sure, I will add merge
this on top of my patch.

Thanks and BR,
Ricardo