From: Matthew Garrett <mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
To: Lingzhu Xiang <lxiang-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Matt Fleming
<matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>,
linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Matthew Garrett <mjg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Jeremy Kerr <jeremy.kerr-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>,
Andy Whitcroft <apw-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>,
Jan Beulich <JBeulich-IBi9RG/b67k@public.gmane.org>,
Chun-Yi Lee
<joeyli.kernel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Matt Fleming
<matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: efivarfs allows non-canonical GUID and duplicate filenames
Date: Tue, 29 Jan 2013 05:25:32 +0000 [thread overview]
Message-ID: <20130129052532.GA15383@srcf.ucam.org> (raw)
In-Reply-To: <51075B56.5050408-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Tue, Jan 29, 2013 at 01:17:10PM +0800, Lingzhu Xiang wrote:
> On 01/29/2013 12:44 PM, Matthew Garrett wrote:
> >>[root@qemu-ovmf efivars]# touch BootOrder-8BE4DF61-93CA-11D2-AA0D-00E098032B8C
> >
> >Ha ok. Other than the change in name over unmount, does this one cause
> >any problems?
>
> This demonstrates how to create two files with the same name in efivarfs.
>
> [root@qemu-ovmf efivars]# ll BootOrder*
> -rw-r--r--. 1 root root 12 Jan 25 14:56
> BootOrder-8be4df61-93ca-11d2-aa0d-00e098032b8c
> -rw-r--r--. 1 root root 12 Jan 25 14:56
> BootOrder-8be4df61-93ca-11d2-aa0d-00e098032b8c
Huh. The firmware permits two variables with the same GUID in different
cases?
--
Matthew Garrett | mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org
next prev parent reply other threads:[~2013-01-29 5:25 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-26 7:51 [PATCH 00/20] EFI changes for v3.8 Matt Fleming
[not found] ` <1351237923-10313-1-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2012-10-26 7:51 ` [PATCH 01/20] efi: Add support for a UEFI variable filesystem Matt Fleming
[not found] ` <1351237923-10313-2-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2012-10-26 10:10 ` Alan Cox
[not found] ` <20121026111039.4802a3c2-38n7/U1jhRXW96NNrWNlrekiAK3p4hvP@public.gmane.org>
2012-10-26 10:45 ` Matt Fleming
2012-11-02 8:53 ` [PATCH v2 " Matt Fleming
[not found] ` <1351846416.14888.155.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2012-11-03 0:22 ` Alan Cox
[not found] ` <20121103002249.63eb4142-38n7/U1jhRXW96NNrWNlrekiAK3p4hvP@public.gmane.org>
2012-11-03 0:21 ` Matthew Garrett
[not found] ` <20121103002132.GB18691-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2012-11-04 20:27 ` Matt Fleming
[not found] ` <1352060878.14888.193.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2012-11-04 20:34 ` Matthew Garrett
[not found] ` <20121104203437.GA23130-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2012-11-04 20:47 ` Matt Fleming
[not found] ` <1352062026.14888.199.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2012-11-04 20:55 ` Matthew Garrett
2012-11-09 19:39 ` Matt Fleming
2012-11-04 21:06 ` Alan Cox
[not found] ` <20121104210627.6f57662a-38n7/U1jhRXW96NNrWNlrekiAK3p4hvP@public.gmane.org>
2012-11-05 7:42 ` Matt Fleming
2012-12-21 5:54 ` [PATCH " Lingzhu Xiang
[not found] ` <50D3F995.5000705-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-04 20:58 ` Matt Fleming
[not found] ` <1357333116.8203.50.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2013-01-05 5:59 ` [PATCH] efivarfs: Drop link count of the right inode Lingzhu Xiang
[not found] ` <44edfa54b80aedb674bdb482eef4f559030d9bf7.1357365172.git.lxiang-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-07 13:41 ` joeyli
2013-01-07 16:15 ` Matt Fleming
2012-12-21 11:05 ` General protection fault in efivarfs Lingzhu Xiang
[not found] ` <50D44279.7010008-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-12-24 11:00 ` joeyli
[not found] ` <1356346840.6113.45.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2012-12-25 2:24 ` Lingzhu Xiang
[not found] ` <50D90E61.40702-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-12-25 4:13 ` joeyli
[not found] ` <1356408784.6113.68.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2012-12-26 6:02 ` joeyli
[not found] ` <1356501732.6113.213.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2012-12-26 9:21 ` efivarfs: unlinking open files results in spinlock corruption Lingzhu Xiang
[not found] ` <50DAC19A.8060500-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-12-26 10:16 ` joeyli
[not found] ` <1356516962.6113.232.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2012-12-26 10:40 ` Lingzhu Xiang
2013-01-11 13:22 ` General protection fault in efivarfs Matt Fleming
2013-01-25 7:01 ` efivarfs allows non-canonical GUID and duplicate filenames Lingzhu Xiang
[not found] ` <51022DD7.4010701-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-29 4:44 ` Matthew Garrett
[not found] ` <20130129044418.GD14395-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-01-29 5:17 ` Lingzhu Xiang
[not found] ` <51075B56.5050408-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-29 5:25 ` Matthew Garrett [this message]
[not found] ` <20130129052532.GA15383-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-01-29 5:46 ` Lingzhu Xiang
[not found] ` <51076220.5080001-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-31 19:52 ` Matt Fleming
2012-10-26 7:51 ` [PATCH 02/20] efi: Handle deletions and size changes in efivarfs_write_file Matt Fleming
[not found] ` <1351237923-10313-3-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2012-12-26 10:29 ` File lingers after deletion with efivarfs_write_file Lingzhu Xiang
2012-10-26 7:51 ` [PATCH 03/20] efi: add efivars kobject to efi sysfs folder Matt Fleming
[not found] ` <1351237923-10313-4-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2012-10-26 10:13 ` Alan Cox
[not found] ` <20121026111347.209c11c5-38n7/U1jhRXW96NNrWNlrekiAK3p4hvP@public.gmane.org>
2012-10-26 11:13 ` Matt Fleming
[not found] ` <1351250024.5303.68.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2012-10-29 6:55 ` joeyli
2012-11-02 8:53 ` [PATCH v2 " Matt Fleming
2012-10-26 7:51 ` [PATCH 04/20] efivarfs: Add documentation for the EFI variable filesystem Matt Fleming
2012-10-26 7:51 ` [PATCH 05/20] x86, mm: Include the entire kernel memory map in trampoline_pgd Matt Fleming
2012-10-26 7:51 ` [PATCH 06/20] x86, efi: 1:1 pagetable mapping for virtual EFI calls Matt Fleming
2012-10-26 7:51 ` [PATCH 07/20] x86/kernel: remove tboot 1:1 page table creation code Matt Fleming
2012-10-26 7:51 ` [PATCH 08/20] x86-64/efi: Use EFI to deal with platform wall clock (again) Matt Fleming
2012-10-26 7:51 ` [PATCH 09/20] efivarfs: efivarfs_file_read ensure we free data in error paths Matt Fleming
2012-10-26 7:51 ` [PATCH 10/20] efivarfs: efivarfs_create() ensure we drop our reference on inode on error Matt Fleming
2012-10-26 7:51 ` [PATCH 11/20] efivarfs: efivarfs_fill_super() fix inode reference counts Matt Fleming
2012-10-26 7:51 ` [PATCH 12/20] efivarfs: efivarfs_fill_super() ensure we free our temporary name Matt Fleming
2012-10-26 7:51 ` [PATCH 13/20] efivarfs: efivarfs_fill_super() ensure we clean up correctly on error Matt Fleming
2012-10-26 7:51 ` [PATCH 14/20] efivarfs: Implement exclusive access for {get,set}_variable Matt Fleming
2012-10-26 7:51 ` [PATCH 15/20] efi: Clarify GUID length calculations Matt Fleming
2012-10-26 7:51 ` [PATCH 16/20] efivarfs: Return an error if we fail to read a variable Matt Fleming
[not found] ` <1351237923-10313-17-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2012-11-02 8:53 ` [PATCH v2 " Matt Fleming
[not found] ` <1351846434.14888.157.camel-ZqTwcBeJ+wsBof6jY8KHXm7IUlhRatedral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2012-12-21 7:08 ` Lingzhu Xiang
[not found] ` <50D40ADF.4050700-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-11 13:24 ` Matt Fleming
2012-10-26 7:52 ` [PATCH 17/20] efivarfs: Replace magic number with sizeof(attributes) Matt Fleming
[not found] ` <1351237923-10313-18-git-send-email-matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2012-12-26 9:24 ` Lingzhu Xiang
[not found] ` <50DAC252.5030308-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-11 13:30 ` Matt Fleming
2012-10-26 7:52 ` [PATCH 18/20] efivarfs: Add unique magic number Matt Fleming
2012-10-26 7:52 ` [PATCH 19/20] efivarfs: Make 'datasize' unsigned long Matt Fleming
2012-10-26 7:52 ` [PATCH 20/20] efivarfs: Return a consistent error when efivarfs_get_inode() fails Matt Fleming
2012-11-02 8:54 ` [PATCH 21/20] efivarfs: Fix return value of efivarfs_file_write() Matt Fleming
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