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From: Borislav Petkov <bp@alien8.de>
To: Jann Horn <jannh@google.com>
Cc: Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	the arch/x86 maintainers <x86@kernel.org>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Alexander Potapenko <glider@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	kasan-dev <kasan-dev@googlegroups.com>,
	kernel list <linux-kernel@vger.kernel.org>,
	Andrey Konovalov <andreyknvl@google.com>,
	Andy Lutomirski <luto@kernel.org>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH v3 2/4] x86/traps: Print non-canonical address on #GP
Date: Wed, 20 Nov 2019 13:41:01 +0100	[thread overview]
Message-ID: <20191120124101.GF2634@zn.tnic> (raw)
In-Reply-To: <CAG48ez26RGztX7O9Ej5rbz2in0KBAEnj1ic5C-8ie7=hzc+d=w@mail.gmail.com>

On Wed, Nov 20, 2019 at 01:25:30PM +0100, Jann Horn wrote:
> On Wed, Nov 20, 2019 at 12:24 PM Borislav Petkov <bp@alien8.de> wrote:
> > On Wed, Nov 20, 2019 at 12:18:59PM +0100, Ingo Molnar wrote:
> > > How was this maximum string length of '90' derived? In what way will
> > > that have to change if someone changes the message?
> >
> > That was me counting the string length in a dirty patch in a previous
> > thread. We probably should say why we decided for a certain length and
> > maybe have a define for it.
> 
> Do you think something like this would be better?
> 
> char desc[sizeof(GPFSTR) + 50 + 2*sizeof(unsigned long) + 1] = GPFSTR;

Yap, and the 50 is a sufficiently large number so that all possible
string combinations in this case can fit in the resulting string array.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette

  reply	other threads:[~2019-11-20 12:41 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-20 10:36 [PATCH v3 1/4] x86/insn-eval: Add support for 64-bit kernel mode Jann Horn
2019-11-20 10:36 ` [PATCH v3 2/4] x86/traps: Print non-canonical address on #GP Jann Horn
2019-11-20 11:18   ` Ingo Molnar
2019-11-20 11:24     ` Borislav Petkov
2019-11-20 12:25       ` Jann Horn
2019-11-20 12:41         ` Borislav Petkov [this message]
2019-11-20 13:16         ` Ingo Molnar
2019-11-20 13:23           ` Jann Horn
2019-11-20 14:05             ` Ingo Molnar
2019-11-20 12:14     ` Jann Horn
2019-11-20 12:30       ` Ingo Molnar
2019-11-20 12:39         ` Borislav Petkov
2019-11-20 12:42           ` Jann Horn
2019-11-20 13:28           ` Ingo Molnar
2019-11-20 13:39             ` Borislav Petkov
2019-11-20 16:21               ` Sean Christopherson
2019-11-20 17:37                 ` Borislav Petkov
2019-11-20 10:36 ` [PATCH v3 3/4] x86/dumpstack: Split out header line printing from __die() Jann Horn
2019-11-20 10:36 ` [PATCH v3 4/4] x86/kasan: Print original address on #GP Jann Horn

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