linux-kernel - Re: [RFC] arm64: failed when run the command: timedatectl set-timezone Asia/Shanghai

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Message-ID: <5695A57B.1060905@huawei.com>
Date:	Wed, 13 Jan 2016 09:16:43 +0800
From:	Xishi Qiu <qiuxishi@...wei.com>
To:	Steve Capper <steve.capper@...aro.org>
CC:	Mark Rutland <mark.rutland@....com>,
	zhong jiang <zhongjiang@...wei.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC] arm64: failed when run the command: timedatectl set-timezone
 Asia/Shanghai

On 2016/1/12 18:59, Steve Capper wrote:

> On 12 January 2016 at 03:32, Xishi Qiu <qiuxishi@...wei.com> wrote:
>> On 2016/1/12 10:47, Xishi Qiu wrote:
>>
>>> Failed when run the command: timedatectl set-timezone Asia/Shanghai
>>> But CONFIG_PGTABLE_LEVELS=3 is OK, and CONFIG_PGTABLE_LEVELS=4 is failed.
>>> The kernel is v4.1, and this command need the lib polikit.
>>>
>>> Is this the bug of kernel?
>>>
>>> Thanks,
>>> Xishi Qiu
>>
>> [  241.310558] polkitd[3531]: unhandled level 0 translation fault (11) at 0x7fff9010c040, esr 0x92000004
>> [  241.319838] pgd = ffff801fb3e05000
>> [  241.323259] [7fff9010c040] *pgd=0000000000000000
>>
>> [  241.329407] CPU: 0 PID: 3531 Comm: polkitd Not tainted 4.1.12+ #1
>> [  241.336312] Hardware name: Huawei Taishan 2160 /BC11SPCA, BIOS 1.12 12/30/2015
>> [  241.343566] task: ffff801fb8772f00 ti: ffff80003f454000 task.ti: ffff80003f454000
>> [  241.351089] PC is at 0xffff91d281ec
>> [  241.354594] LR is at 0xffff91cb5b24
>> [  241.358099] pc : [<0000ffff91d281ec>] lr : [<0000ffff91cb5b24>] pstate: 20000000
>> [  241.365526] sp : 0000ffffd47a4380
>> [  241.368858] x29: 0000ffffd47a47c0 x28: 0000000078e8107e
>> [  241.374215] x27: 0000aaaafaf68020 x26: 00007fff9010c040
>> [  241.379571] x25: 0000aaaafaf6c2b0 x24: 0000ffff91ed4000
>> [  241.384931] x23: 0000000000000005 x22: 0000000000000000
>> [  241.390288] x21: 0000000000000000 x20: 0000000000000008
>> [  241.395644] x19: 0000ffff91ed4000 x18: 00000000000007df
>> [  241.401004] x17: 0000ffff91ed5740 x16: 0000ffff91ce84ec
>> [  241.406360] x15: 0000ffffd47a46a0 x14: 0000ffff91c07370
>> [  241.411716] x13: 00000000000003d0 x12: 0000ffff92340000
>> [  241.417074] x11: 0000000000000000 x10: 0101010101010101
>> [  241.422431] x9 : 0000ffff90108218 x8 : 00000000f20217f7
>> [  241.427786] x7 : 0000aaaafaf6db40 x6 : 0000ffff90109060
>> [  241.433146] x5 : 0000000000000000 x4 : 0000aaaafaf6dc30
>> [  241.438502] x3 : 0000000000000001 x2 : 0000000000000008
>> [  241.443858] x1 : 0000aaaafaf68020 x0 : 00007fff9010c040
>>
>>
>>
> 
> Hi Xishi,
> This looks like a bug in the Mozilla Javascript engine (which is used
> by polkitd). It incorrectly assumes that virtual addresses are at most
> 47 bit and uses the upper bits for pointer tagging.
> When we enable a 48-bit VA on arm64, this then exacerbates the problem
> (your VA of 0x7fff9010c040 should likely be 0xffff9010c040).
> 
> I have raised this issue at:
> https://bugzilla.mozilla.org/show_bug.cgi?id=1143022
> 
> I'm not sure as to the best way of getting this fixed, I would suggest
> adding to the bug report above as a first step.
> 

Hi Steve,

I find another issue at:
https://bugzilla.redhat.com/show_bug.cgi?id=1242326

In your issue, Tom Schuster said it sounds like bug 910845
https://bugzilla.mozilla.org/show_bug.cgi?id=910845
Does "__ia64__" mean Itanium arch or all the 64-bit arch?

I'm not familiar with these rpms, so which fix is correct?

Thanks,
Xishi Qiu

> Cheers,