From: Andy Lutomirski <luto@kernel.org>
To: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Andrew Lutomirski <luto@kernel.org>,
Borislav Petkov <bp@alien8.de>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Greg KH <gregkh@linuxfoundation.org>,
rafael.tinoco@linaro.org, Shuah Khan <shuah@kernel.org>,
Ingo Molnar <mingo@kernel.org>
Subject: Re: qemu-system-x86_64: mov_ss_trap_64 PANIC: double fault, error_code: 0x0
Date: Mon, 25 Jun 2018 08:47:40 -0700 [thread overview]
Message-ID: <CALCETrWZ=sipwoVic16LM08+-FKV5knO7Cv3pSM_5w=KLCqTKw@mail.gmail.com> (raw)
In-Reply-To: <CA+G9fYu0E0fM+WaFim1WKup5BZvjtGZ_4ii5FhTUjNZEqaAuwA@mail.gmail.com>
On Sun, Jun 24, 2018 at 10:41 PM Naresh Kamboju
<naresh.kamboju@linaro.org> wrote:
>
> Kselftest test case mov_ss_trap_64 is causing kernel panic on
> qemu-system-x86_64 and PASS on real x86_64 hardware.
>
> Test code snippet,
> main() {
> <>
> printf("[RUN]\tMOV SS; CS CS INT3\n");
> asm volatile ("mov %[ss], %%ss; .byte 0x2e, 0x2e; int3" :: [ss] "m" (ss));
> <>
> }
>
This smells like CVE-2018-1087. Can you confirm that your *host*
kernel is patched?
CVE-2018-1087 is extremely severe, and if your host kernel is not
patched, I think you need to apply some serious pressure on your
vendor to get with the program.
--Andy
next prev parent reply other threads:[~2018-06-25 15:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-25 5:41 qemu-system-x86_64: mov_ss_trap_64 PANIC: double fault, error_code: 0x0 Naresh Kamboju
2018-06-25 15:47 ` Andy Lutomirski [this message]
2018-06-26 17:06 ` Dan Rue
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