From: Borislav Petkov <bp@alien8.de>
To: Dmitry Vyukov <dvyukov@google.com>, Jann Horn <jannh@google.com>
Cc: 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>,
kasan-dev <kasan-dev@googlegroups.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrey Konovalov <andreyknvl@google.com>,
Andy Lutomirski <luto@kernel.org>,
Sean Christopherson <sean.j.christopherson@intel.com>
Subject: Re: [PATCH v2 2/3] x86/traps: Print non-canonical address on #GP
Date: Mon, 18 Nov 2019 18:38:50 +0100 [thread overview]
Message-ID: <20191118173850.GL6363@zn.tnic> (raw)
In-Reply-To: <20191118164407.GH6363@zn.tnic>
On Mon, Nov 18, 2019 at 05:44:07PM +0100, Borislav Petkov wrote:
> [ 2.523708] Write protecting the kernel read-only data: 16384k
> [ 2.524729] Freeing unused kernel image (text/rodata gap) memory: 2040K
> [ 2.525594] Freeing unused kernel image (rodata/data gap) memory: 368K
> [ 2.541414] x86/mm: Checked W+X mappings: passed, no W+X pages found.
>
> <--- important first splat starts here:
>
> [ 2.542218] [*] general protection fault while derefing a non-canonical address 0xdfff000000000001: 0000 [#1] PREEMPT SMP
^
Btw, tglx just suggested on IRC to simply slap the die_counter number here so
that you have
[ 2.543343] [1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.0-rc8+ #8
[ 2.544138] [1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.1-1 04/01/2014
...
which also tells you to which splat the line belongs to.
Also useful.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2019-11-18 17:38 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-15 19:17 [PATCH v2 1/3] x86/insn-eval: Add support for 64-bit kernel mode Jann Horn
2019-11-15 19:17 ` [PATCH v2 2/3] x86/traps: Print non-canonical address on #GP Jann Horn
2019-11-18 14:21 ` Borislav Petkov
2019-11-18 16:02 ` Dmitry Vyukov
2019-11-18 16:19 ` Jann Horn
2019-11-18 16:29 ` Dmitry Vyukov
2019-11-18 16:40 ` error attribution for stalls [was: [PATCH v2 2/3] x86/traps: Print non-canonical address on #GP] Jann Horn
2019-11-18 16:44 ` [PATCH v2 2/3] x86/traps: Print non-canonical address on #GP Borislav Petkov
2019-11-18 17:38 ` Borislav Petkov [this message]
2019-11-20 11:41 ` Ingo Molnar
2019-11-20 11:40 ` Ingo Molnar
2019-11-20 11:52 ` Borislav Petkov
2019-11-20 4:25 ` Andi Kleen
2019-11-20 10:31 ` Jann Horn
2019-11-20 13:56 ` Andi Kleen
2019-11-20 14:24 ` Jann Horn
2019-11-23 23:07 ` Andy Lutomirski
2019-11-27 20:27 ` Jann Horn
2019-11-28 5:23 ` Andy Lutomirski
2019-11-15 19:17 ` [PATCH v2 3/3] x86/kasan: Print original " Jann Horn
2019-11-18 8:36 ` Dmitry Vyukov
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