linux-kernel - Re: [PATCH v9 00/21] Introduce ACPI for ARM64 based on ACPI 5.1

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 27 Feb 2015 15:05:47 -0600
From:	Timur Tabi <timur@...eaurora.org>
To:	Ard Biesheuvel <ard.biesheuvel@...aro.org>
CC:	Hanjun Guo <hanjun.guo@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Will Deacon <will.deacon@....com>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Ashwin Chaugule <ashwinc@...eaurora.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Robert Richter <rric@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
	Marc Zyngier <marc.zyngier@....com>,
	Jon Masters <jcm@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Mark Brown <broonie@...nel.org>,
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
	Sudeep Holla <Sudeep.Holla@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9 00/21] Introduce ACPI for ARM64 based on ACPI 5.1

On 02/27/2015 02:50 AM, Ard Biesheuvel wrote:
> On 27 February 2015 at 03:20, Timur Tabi <timur@...eaurora.org> wrote:
>> On 02/25/2015 02:39 AM, Hanjun Guo wrote:
>>>
>>> Changes since v8:
>>
>>
>> I'm still debugging it, but v9 on the 4.0-rc1 kernel crashes after calling
>> the UEFI boot time services exit function.  That is, this line:
>>
>> status = sys_table->boottime->exit_boot_services(handle, mmap_key);
>>
>> in allocate_new_fdt_and_exit_boot() gets called, and then soon after it
>> returns, the kernel crashes.  It's really early because the UEFI exception
>> handler is called.
>>
>> I did not have this problem with v8 patchset on 3.19.
>>
>
> Are you not seeing this on v4.0-rc1 without the patchset applied?

You're right -- I get the same crash even without the patchset applied.

> Could the crash be inside the subsequent call to
> SetVirtualAddressMap() instead of inside ExitBootServices()?

It looks that way.  I'm going to have to debug that.

> If so, you have a firmware bug: Mark Rutland spotted a similar bug in
> the AMD Seattle firmware, which has been fixed in the mean time.
> It has to do with the firmware dereferencing the virtual mapping as it
> is being installed, which violates the UEFI spec.

Thanks.

-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/