From: Logan Gunthorpe <logang@deltatee.com>
To: Kees Cook <keescook@chromium.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Stephen Smalley <sds@tycho.nsa.gov>,
Ingo Molnar <mingo@kernel.org>, Ingo Molnar <mingo@redhat.com>,
the arch/x86 maintainers <x86@kernel.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
Denys Vlasenko <dvlasenk@redhat.com>,
Brian Gerst <brgerst@gmail.com>
Subject: Re: PROBLEM: Resume form hibernate broken by setting NX on gap
Date: Fri, 10 Jun 2016 12:16:17 -0600 [thread overview]
Message-ID: <575B03F1.3060206@deltatee.com> (raw)
In-Reply-To: <CAGXu5jK15P5CAQd09NzG31YMPEKJGXbhXiYDQ2sRC=WBhAFTrA@mail.gmail.com>
Hey,
On 10/06/16 12:09 PM, Kees Cook wrote:
>> restore_code: ffff880157c3b000
>> jump_addr: ffffffff81446be0
>>
>>
>> diff --git a/arch/x86/power/hibernate_64.c b/arch/x86/power/hibernate_64.c
>> index 009947d..6efedb7 100644
>> --- a/arch/x86/power/hibernate_64.c
>> +++ b/arch/x86/power/hibernate_64.c
>> @@ -92,6 +92,9 @@ int swsusp_arch_resume(void)
>> memcpy(relocated_restore_code, &core_restore_code,
>> &restore_registers - &core_restore_code);
>>
>> + pr_info("restore_code: %p\n", relocated_restore_code);
>> + pr_info("jump_addr: %lx\n", restore_jump_address);
>> +
>
> Also interesting would be the "relocated_restore_code" address, as
> well as a dump of /sys/kernel/debug/kernel_page_tables (from
> CONFIG_X86_PTDUMP).
Is that not what I printed? If not, can you give me a better hint as to
what you're looking for so I can spin another kernel? I'll also provide
the kernel_page_tables once I do that.
> I'm baffled by the problem, but the best I can understand is the the
> relocated_restore_code range isn't executable (which should be visible
> from finding it in /sys/kernel/debug/kernel_page_tables), but I don't
> see how to solve that since my original patch didn't work.
Yeah this is definitely a baffling problem.
Thanks,
Logan
next prev parent reply other threads:[~2016-06-10 18:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <573DF82D.50006@deltatee.com>
2016-05-20 7:15 ` PROBLEM: Resume form hibernate broken by setting NX on gap Ingo Molnar
2016-05-20 11:34 ` Rafael J. Wysocki
2016-05-20 13:56 ` Stephen Smalley
2016-05-20 21:46 ` Rafael J. Wysocki
2016-05-20 21:59 ` Kees Cook
2016-05-20 22:16 ` Kees Cook
[not found] ` <573FC081.20006@deltatee.com>
2016-05-21 16:39 ` Kees Cook
[not found] ` <575A3E95.5090100@deltatee.com>
2016-06-10 18:09 ` Kees Cook
2016-06-10 18:16 ` Logan Gunthorpe [this message]
2016-06-10 18:18 ` Kees Cook
2016-06-10 21:27 ` Rafael J. Wysocki
2016-06-10 22:29 ` Rafael J. Wysocki
2016-06-10 22:28 ` Logan Gunthorpe
2016-06-10 22:33 ` Rafael J. Wysocki
2016-06-11 0:13 ` Rafael J. Wysocki
2016-06-11 1:47 ` Rafael J. Wysocki
2016-06-11 11:48 ` Rafael J. Wysocki
2016-06-11 16:35 ` Logan Gunthorpe
2016-06-11 17:39 ` Logan Gunthorpe
2016-06-12 1:05 ` Rafael J. Wysocki
2016-06-12 4:48 ` Logan Gunthorpe
2016-06-12 14:31 ` Rafael J. Wysocki
2016-06-12 16:11 ` Logan Gunthorpe
2016-06-13 13:43 ` Rafael J. Wysocki
2016-06-10 22:11 ` Rafael J. Wysocki
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