linux-kernel - Re: [BUG] can't boot up: unable to handle kernel paging request at ffffffffff340003

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20140210175246.GB2887@console-pimps.org>
Date:	Mon, 10 Feb 2014 17:52:46 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Madper Xie <cxie@...hat.com>
Cc:	Matt Fleming <matt.fleming@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Adam Williamson <awilliam@...hat.com>
Subject: Re: [BUG] can't boot up: unable to handle kernel paging request at
 ffffffffff340003

On Mon, 10 Feb, at 03:23:33PM, Madper Xie wrote:
> Howdy,
> 
> With old kernel (from 3.10 to 3.14-rc1), my hp box shows following
> outputs:
> ~~~
> [    0.009166] Freeing SMP alternatives memory: 20K (ffffffff82234000 - ffffffff82239000)
> [    0.010302] ioremap: invalid physical address 1376e01800000001
> [    0.010303] ------------[ cut here ]------------
> [    0.010308] WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:83 __ioremap_caller+0x357/0x380()

OK, this looks like a bogus BGRT address, that's a 64-bit physical
address. I suspect the BGRT address is actually 0x1376e018, but that's
just a guess. This looks like a BIOS bug.

> ~~~
> However the box can boot up and works well.
> After I update kernel to 3.14-rc2, it panic when booting. Here is
> console output:
> ~~~
> [    0.010366] BUG: unable to handle kernel paging request at ffffffffff340003
> [    0.017376] IP: [<ffffffff81d85ba4>] efi_bgrt_init+0x9d/0x133
> [    0.023153] PGD 159eb067 PUD 159ed067 PMD 16240067 PTE 9376e01800000163
> [    0.029842] Oops: 0009 [#1] SMP 

Well, nuts. I think this is my bad. Does reverting commit 081cd62a010f
("x86/efi: Allow mapping BGRT on x86-32") make things work? Or at least,
work as well as they did prior to -rc2?

I wonder if we're calling early_memremap() when the fixmap slots are no
longer valid. Could you try building the 'urgent' branch at,

  git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git

-- 
Matt Fleming, Intel Open Source Technology Center
--
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/