firefly-linux-kernel-4.4.55.git
10 years agoarm64: add EFI runtime services
Mark Salter [Wed, 16 Apr 2014 01:59:30 +0000 (21:59 -0400)]
arm64: add EFI runtime services

This patch adds EFI runtime support for arm64. This runtime support allows
the kernel to access various EFI runtime services provided by EFI firmware.
Things like reboot, real time clock, EFI boot variables, and others.

This functionality is supported for little endian kernels only. The UEFI
firmware standard specifies that the firmware be little endian. A future
patch is expected to add support for big endian kernels running with
little endian firmware.

Signed-off-by: Mark Salter <msalter@redhat.com>
[ Remove unnecessary cache/tlb maintenance. ]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit f84d02755f5a9f3b88e8d15d6384da25ad6dcf5e)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/arm64/Kconfig
arch/arm64/kernel/Makefile

10 years agoefi: fdt: Do not report an error during boot if UEFI is not available
Catalin Marinas [Tue, 8 Jul 2014 15:54:18 +0000 (16:54 +0100)]
efi: fdt: Do not report an error during boot if UEFI is not available

Currently, fdt_find_uefi_params() reports an error if no EFI parameters
are found in the DT. This is however a valid case for non-UEFI kernel
booting. This patch checks changes the error reporting to a
pr_info("UEFI not found") when no EFI parameters are found in the DT.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 29e2435fd6d71e0136e2c2ff0433b7dbeeaaccfd)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi/arm64: efistub: remove local copy of linux_banner
Ard Biesheuvel [Fri, 13 Jun 2014 11:11:51 +0000 (13:11 +0200)]
efi/arm64: efistub: remove local copy of linux_banner

The shared efistub code for ARM and arm64 contains a local copy of
linux_banner, allowing it to be referenced from separate executables
such as the ARM decompressor. However, this introduces a dependency on
generated header files, causing unnecessary rebuilds of the stub itself
and, in case of arm64, vmlinux which contains it.

On arm64, the copy is not actually needed since we can reference the
original symbol directly, and as it turns out, there may be better ways
to deal with this for ARM as well, so let's remove it from the shared
code. If it still needs to be reintroduced for ARM later, it should live
under arch/arm anyway and not in shared code.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit a55c072dfe520f8fa03cf11b07b9268a8a17820a)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Fix compiler warnings (unused, const, type)
Catalin Marinas [Mon, 2 Jun 2014 10:31:06 +0000 (11:31 +0100)]
efi: Fix compiler warnings (unused, const, type)

This patch fixes a few compiler warning in the efi code for unused
variable, discarding const qualifier and wrong pointer type:

drivers/firmware/efi/fdt.c|66 col 22| warning: unused variable ‘name’ [-Wunused-variable]
drivers/firmware/efi/efi.c|368 col 3| warning: passing argument 3 of ‘of_get_flat_dt_prop’ from incompatible pointer type [enabled by default]
drivers/firmware/efi/efi.c|368 col 8| warning: assignment discards ‘const’ qualifier from pointer target type [enabled by default]

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 6fb8cc82c096fd5ccf277678639193cae07125a0)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi/arm64: ignore dtb= when UEFI SecureBoot is enabled
Ard Biesheuvel [Thu, 3 Apr 2014 15:46:58 +0000 (17:46 +0200)]
efi/arm64: ignore dtb= when UEFI SecureBoot is enabled

Loading unauthenticated FDT blobs directly from storage is a security hazard,
so this should only be allowed when running with UEFI Secure Boot disabled.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 345c736edd07b657a8c48190baed2719b85d0938)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoarm64: efi: add EFI stub
Mark Salter [Wed, 16 Apr 2014 02:47:52 +0000 (22:47 -0400)]
arm64: efi: add EFI stub

This patch adds PE/COFF header fields to the start of the kernel
Image so that it appears as an EFI application to UEFI firmware.
An EFI stub is included to allow direct booting of the kernel
Image.

Signed-off-by: Mark Salter <msalter@redhat.com>
[Add support in PE/COFF header for signed images]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 3c7f255039a2ad6ee1e3890505caf0d029b22e29)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/arm64/Kconfig
arch/arm64/kernel/Makefile

10 years agoarm64: Expand arm64 image header
Roy Franz [Wed, 14 Aug 2013 23:10:00 +0000 (00:10 +0100)]
arm64: Expand arm64 image header

Expand the arm64 image header to allow for co-existance with
PE/COFF header required by the EFI stub.  The PE/COFF format
requires the "MZ" header to be at offset 0, and the offset
to the PE/COFF header to be at offset 0x3c.  The image
header is expanded to allow 2 instructions at the beginning
to accommodate a benign intruction at offset 0 that includes
the "MZ" header, a magic number, and the offset to the PE/COFF
header.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit 4370eec05a887b0cd4392cd5dc5b2713174745c0)
Signed-off-by: Mark Brown <broonie@linaro.org>
(cherry picked from commit 3033aae67ae55a86e2a0b73199984ff060effa7b)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Move facility flags to struct efi
Matt Fleming [Wed, 15 Jan 2014 13:21:22 +0000 (13:21 +0000)]
efi: Move facility flags to struct efi

As we grow support for more EFI architectures they're going to want the
ability to query which EFI features are available on the running system.
Instead of storing this information in an architecture-specific place,
stick it in the global 'struct efi', which is already the central
location for EFI state.

While we're at it, let's change the return value of efi_enabled() to be
bool and replace all references to 'facility' with 'feature', which is
the usual word used to describe the attributes of the running system.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 3e909599215456928e6b42a04f11c2517881570b)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/x86/platform/efi/efi.c

10 years agoia64/efi: Implement efi_enabled()
Matt Fleming [Wed, 15 Jan 2014 13:49:51 +0000 (13:49 +0000)]
ia64/efi: Implement efi_enabled()

There's no good reason to keep efi_enabled() under CONFIG_X86 anymore,
since nothing about the implementation is specific to x86.

Set EFI feature flags in the ia64 boot path instead of claiming to
support all features. The old behaviour was actually buggy since
efi.memmap never points to a valid memory map, so we shouldn't be
claiming to support EFI_MEMMAP.

Fortunately, this bug was never triggered because EFI_MEMMAP isn't used
outside of arch/x86 currently, but that may not always be the case.

Reviewed-and-tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 092063808c498eccac8e891973bf143e7b60d723)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Add separate 32-bit/64-bit definitions
Matt Fleming [Fri, 10 Jan 2014 13:47:37 +0000 (13:47 +0000)]
efi: Add separate 32-bit/64-bit definitions

The traditional approach of using machine-specific types such as
'unsigned long' does not allow the kernel to interact with firmware
running in a different CPU mode, e.g. 64-bit kernel with 32-bit EFI.

Add distinct EFI structure definitions for both 32-bit and 64-bit so
that we can use them in the 32-bit and 64-bit code paths.

Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 677703cef0a148ba07d37ced649ad25b1cda2f78)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
include/linux/efi.h

10 years agoefivars: Add compatibility code for compat tasks
Matt Fleming [Mon, 17 Mar 2014 15:36:37 +0000 (15:36 +0000)]
efivars: Add compatibility code for compat tasks

It seems people are using 32-bit efibootmgr on top of 64-bit kernels,
which will currently fail horribly when using the efivars interface,
which is the traditional efibootmgr backend (the other being efivarfs).

Since there is no versioning info in the data structure, figure out when
we need to munge the structure data via judicious use of
is_compat_task().

Cc: Mike Waychison <mikew@google.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit e33655a386ed3b26ad36fb97a47ebb1c2ca1e928)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars: Refactor sanity checking code into separate function
Matt Fleming [Mon, 17 Mar 2014 15:08:34 +0000 (15:08 +0000)]
efivars: Refactor sanity checking code into separate function

Move a large chunk of code that checks the validity of efi_variable into
a new function, because we'll also need to use it for the compat code.

Cc: Mike Waychison <mikew@google.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 54d2fbfb0c9d341c891926100ed0e5d4c4b0c987)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars: Stop passing a struct argument to efivar_validate()
Matt Fleming [Mon, 17 Mar 2014 10:57:00 +0000 (10:57 +0000)]
efivars: Stop passing a struct argument to efivar_validate()

In preparation for compat support, we can't assume that user variable
object is represented by a 'struct efi_variable'. Convert the validation
functions to take the variable name as an argument, which is the only
piece of the struct that was ever used anyway.

Cc: Mike Waychison <mikew@google.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit a5d92ad32dad94fd8f3f61778561d532bb3a2f77)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars: Check size of user object
Matt Fleming [Mon, 17 Mar 2014 09:17:28 +0000 (09:17 +0000)]
efivars: Check size of user object

Unbelieavably there are no checks to see whether the data structure
passed to 'new_var' and 'del_var' is the size that we expect. Let's add
some for better robustness.

Cc: Mike Waychison <mikew@google.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit e003bbee2a6a19a4c733335989284caf1b179e0d)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars: Use local variables instead of a pointer dereference
Matt Fleming [Sun, 16 Mar 2014 12:14:49 +0000 (12:14 +0000)]
efivars: Use local variables instead of a pointer dereference

In order to support a compat interface we need to stop passing pointers
to structures around, since the type of structure is going to depend on
whether the current task is a compat task.

Cc: Mike Waychison <mikew@google.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit bafc84d539c0ffa916037840df54428623abc3e6)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Use NULL instead of 0 for pointer
Daeseok Youn [Thu, 13 Feb 2014 08:16:36 +0000 (17:16 +0900)]
efi: Use NULL instead of 0 for pointer

Fix following sparse warnings:

drivers/firmware/efi/efivars.c:230:66: warning:
 Using plain integer as NULL pointer
drivers/firmware/efi/efi.c:236:27: warning:
 Using plain integer as NULL pointer

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 69e608411473ac56358ef35277563982d0565381)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars, efi-pstore: Hold off deletion of sysfs entry until the scan is completed
Seiji Aguchi [Wed, 30 Oct 2013 19:27:26 +0000 (15:27 -0400)]
efivars, efi-pstore: Hold off deletion of sysfs entry until the scan is completed

Currently, when mounting pstore file system, a read callback of
efi_pstore driver runs mutiple times as below.

- In the first read callback, scan efivar_sysfs_list from head and pass
  a kmsg buffer of a entry to an upper pstore layer.
- In the second read callback, rescan efivar_sysfs_list from the entry
  and pass another kmsg buffer to it.
- Repeat the scan and pass until the end of efivar_sysfs_list.

In this process, an entry is read across the multiple read function
calls. To avoid race between the read and erasion, the whole process
above is protected by a spinlock, holding in open() and releasing in
close().

At the same time, kmemdup() is called to pass the buffer to pstore
filesystem during it. And then, it causes a following lockdep warning.

To make the dynamic memory allocation runnable without taking spinlock,
holding off a deletion of sysfs entry if it happens while scanning it
via efi_pstore, and deleting it after the scan is completed.

To implement it, this patch introduces two flags, scanning and deleting,
to efivar_entry.

On the code basis, it seems that all the scanning and deleting logic is
not needed because __efivars->lock are not dropped when reading from the
EFI variable store.

But, the scanning and deleting logic is still needed because an
efi-pstore and a pstore filesystem works as follows.

In case an entry(A) is found, the pointer is saved to psi->data.  And
efi_pstore_read() passes the entry(A) to a pstore filesystem by
releasing  __efivars->lock.

And then, the pstore filesystem calls efi_pstore_read() again and the
same entry(A), which is saved to psi->data, is used for resuming to scan
a sysfs-list.

So, to protect the entry(A), the logic is needed.

[    1.143710] ------------[ cut here ]------------
[    1.144058] WARNING: CPU: 1 PID: 1 at kernel/lockdep.c:2740 lockdep_trace_alloc+0x104/0x110()
[    1.144058] DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))
[    1.144058] Modules linked in:
[    1.144058] CPU: 1 PID: 1 Comm: systemd Not tainted 3.11.0-rc5 #2
[    1.144058]  0000000000000009 ffff8800797e9ae0 ffffffff816614a5 ffff8800797e9b28
[    1.144058]  ffff8800797e9b18 ffffffff8105510d 0000000000000080 0000000000000046
[    1.144058]  00000000000000d0 00000000000003af ffffffff81ccd0c0 ffff8800797e9b78
[    1.144058] Call Trace:
[    1.144058]  [<ffffffff816614a5>] dump_stack+0x54/0x74
[    1.144058]  [<ffffffff8105510d>] warn_slowpath_common+0x7d/0xa0
[    1.144058]  [<ffffffff8105517c>] warn_slowpath_fmt+0x4c/0x50
[    1.144058]  [<ffffffff8131290f>] ? vsscanf+0x57f/0x7b0
[    1.144058]  [<ffffffff810bbd74>] lockdep_trace_alloc+0x104/0x110
[    1.144058]  [<ffffffff81192da0>] __kmalloc_track_caller+0x50/0x280
[    1.144058]  [<ffffffff815147bb>] ? efi_pstore_read_func.part.1+0x12b/0x170
[    1.144058]  [<ffffffff8115b260>] kmemdup+0x20/0x50
[    1.144058]  [<ffffffff815147bb>] efi_pstore_read_func.part.1+0x12b/0x170
[    1.144058]  [<ffffffff81514800>] ? efi_pstore_read_func.part.1+0x170/0x170
[    1.144058]  [<ffffffff815148b4>] efi_pstore_read_func+0xb4/0xe0
[    1.144058]  [<ffffffff81512b7b>] __efivar_entry_iter+0xfb/0x120
[    1.144058]  [<ffffffff8151428f>] efi_pstore_read+0x3f/0x50
[    1.144058]  [<ffffffff8128d7ba>] pstore_get_records+0x9a/0x150
[    1.158207]  [<ffffffff812af25c>] ? selinux_d_instantiate+0x1c/0x20
[    1.158207]  [<ffffffff8128ce30>] ? parse_options+0x80/0x80
[    1.158207]  [<ffffffff8128ced5>] pstore_fill_super+0xa5/0xc0
[    1.158207]  [<ffffffff811ae7d2>] mount_single+0xa2/0xd0
[    1.158207]  [<ffffffff8128ccf8>] pstore_mount+0x18/0x20
[    1.158207]  [<ffffffff811ae8b9>] mount_fs+0x39/0x1b0
[    1.158207]  [<ffffffff81160550>] ? __alloc_percpu+0x10/0x20
[    1.158207]  [<ffffffff811c9493>] vfs_kern_mount+0x63/0xf0
[    1.158207]  [<ffffffff811cbb0e>] do_mount+0x23e/0xa20
[    1.158207]  [<ffffffff8115b51b>] ? strndup_user+0x4b/0xf0
[    1.158207]  [<ffffffff811cc373>] SyS_mount+0x83/0xc0
[    1.158207]  [<ffffffff81673cc2>] system_call_fastpath+0x16/0x1b
[    1.158207] ---[ end trace 61981bc62de9f6f4 ]---

Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com>
Tested-by: Madper Xie <cxie@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit e0d59733f6b1796b8d6692642c87d7dd862c3e3a)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars: Mark local function as static
Bojan Prtvar [Tue, 3 Sep 2013 06:56:20 +0000 (08:56 +0200)]
efivars: Mark local function as static

This fixes the following sparse warning
drivers/firmware/efi/efivars.c:567:6: warning: symbol 'efivars_sysfs_exit' was not declared. Should it be static?

Signed-off-by: Bojan Prtvar <prtvar.b@gmail.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 6f9dd30c22da4e48c4b7b837e9641f072e673161)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Move facility flags to struct efi
Matt Fleming [Wed, 15 Jan 2014 13:21:22 +0000 (13:21 +0000)]
efi: Move facility flags to struct efi

As we grow support for more EFI architectures they're going to want the
ability to query which EFI features are available on the running system.
Instead of storing this information in an architecture-specific place,
stick it in the global 'struct efi', which is already the central
location for EFI state.

While we're at it, let's change the return value of efi_enabled() to be
bool and replace all references to 'facility' with 'feature', which is
the usual word used to describe the attributes of the running system.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 3e909599215456928e6b42a04f11c2517881570b)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/x86/include/asm/efi.h
arch/x86/platform/efi/efi.c

10 years agoefi: Add proper definitions for some EFI function pointers.
Roy Franz [Sun, 22 Sep 2013 22:45:26 +0000 (15:45 -0700)]
efi: Add proper definitions for some EFI function pointers.

The x86/AMD64 EFI stubs must use a call wrapper to convert between
the Linux and EFI ABIs, so void pointers are sufficient.  For ARM,
the ABIs are compatible, so we can directly invoke the function
pointers.  The functions that are used by the ARM stub are updated
to match the EFI definitions.
Also add some EFI types used by EFI functions.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit ed37ddffe201bfad7be3c45bc08bd65b5298adca)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: create memory map iteration helper
Mark Salter [Fri, 10 Jan 2014 19:26:06 +0000 (14:26 -0500)]
efi: create memory map iteration helper

There are a lot of places in the kernel which iterate through an
EFI memory map. Most of these places use essentially the same
for-loop code. This patch adds a for_each_efi_memory_desc()
helper to clean up all of the existing duplicate code and avoid
more in the future.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit e885cd805fc6e65ef5150a211c7bac02f925af04)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Add shared FDT related functions for ARM/ARM64
Roy Franz [Thu, 9 Jan 2014 01:54:19 +0000 (17:54 -0800)]
efi: Add shared FDT related functions for ARM/ARM64

Both ARM and ARM64 stubs will update the device tree that they pass to
the kernel.  In both cases they primarily need to add the same UEFI
related information, so the function can be shared.  Create a new FDT
related file for this to avoid use of architecture #ifdefs in
efi-stub-helper.c.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
[ Fixed memory node deletion code. ]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 263b4a30bfdb0d756ae9c70c6ff2eef1eb951770)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: add helper function to get UEFI params from FDT
Mark Salter [Mon, 30 Dec 2013 17:12:12 +0000 (12:12 -0500)]
efi: add helper function to get UEFI params from FDT

ARM and ARM64 architectures use the device tree to pass UEFI parameters
from stub to kernel. These parameters are things known to the stub but
not discoverable by the kernel after the stub calls ExitBootSerives().
There is a helper function in:

   drivers/firmware/efi/fdt.c

which the stub uses to add the UEFI parameters to the device tree.
This patch adds a complimentary helper function which UEFI runtime
support may use to retrieve the parameters from the device tree.
If an architecture wants to use this helper, it should select
CONFIG_EFI_PARAMS_FROM_FDT.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 0302f71c0aa59571ac306f93068fbbfe65ea349b)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
drivers/firmware/efi/Kconfig

10 years agoefi: x86: Handle arbitrary Unicode characters
H. Peter Anvin [Fri, 20 Sep 2013 14:55:39 +0000 (09:55 -0500)]
efi: x86: Handle arbitrary Unicode characters

Instead of truncating UTF-16 assuming all characters is ASCII,
properly convert it to UTF-8.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
[ Bug and style fixes. ]
Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit c625d1c203941fad755eb4eb729db1f65d6e9836)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Add get_dram_base() helper function
Roy Franz [Tue, 28 Jan 2014 18:41:28 +0000 (10:41 -0800)]
efi: Add get_dram_base() helper function

Add the get_dram_base() function, shared by arm/arm64.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 9bb40191e88d23563fd0467ac195debf5f6daaf9)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Add shared printk wrapper for consistent prefixing
Roy Franz [Fri, 13 Dec 2013 19:04:49 +0000 (11:04 -0800)]
efi: Add shared printk wrapper for consistent prefixing

Add a wrapper for printk to standardize the prefix for informational and
error messages from the EFI stub.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit f966ea021f947b20c22b31194d7e3042375c7f24)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: efi-stub-helper cleanup
Leif Lindholm [Fri, 4 Apr 2014 12:25:46 +0000 (13:25 +0100)]
efi: efi-stub-helper cleanup

An #ifdef CONFIG_ARM clause in efi-stub-helper.c got included with some
of the generic stub rework by Roy Franz. Drop it here to make subsequent
patches less confusing.

Also, In handle_cmdline_files(), fh is not initialized, and while the
overall logic around this handling appears safe, gcc does not always
pick this up. Initialize to NULL to remove the resulting warning.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 9403e462fb5ffa9eeaa9663cb23ded02b7e603a3)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Pass correct file handle to efi_file_{read,close}
Matt Fleming [Thu, 10 Apr 2014 13:11:45 +0000 (14:11 +0100)]
efi: Pass correct file handle to efi_file_{read,close}

We're currently passing the file handle for the root file system to
efi_file_read() and efi_file_close(), instead of the file handle for the
file we wish to read/close.

While this has worked up until now, it seems that it has only been by
pure luck. Olivier explains,

 "The issue is the UEFI Fat driver might return the same function for
  'fh->read()' and 'h->read()'. While in our case it does not work with
  a different implementation of EFI_SIMPLE_FILE_SYSTEM_PROTOCOL. In our
  case, we return a different pointer when reading a directory and
  reading a file."

Fixing this actually clears up the two functions because we can drop one
of the arguments, and instead only pass a file 'handle' argument.

Reported-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 47514c996fac5e6f13ef3a4c5e23f1c5cffabb7b)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/x86/boot/compressed/eboot.c

10 years agox86, efi: Abstract x86 efi_early calls
Matt Fleming [Sat, 22 Mar 2014 10:09:01 +0000 (10:09 +0000)]
x86, efi: Abstract x86 efi_early calls

The ARM EFI boot stub doesn't need to care about the efi_early
infrastructure that x86 requires in order to do mixed mode thunking. So
wrap everything up in an efi_call_early() macro.

This allows x86 to do the necessary indirection jumps to call whatever
firmware interface is necessary (native or mixed mode), but also allows
the ARM folks to mask the fact that they don't support relocation in the
boot stub and need to pass 'sys_table_arg' to every function.

[ hpa: there are no object code changes from this patch ]

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Link: http://lkml.kernel.org/r/20140326091011.GB2958@console-pimps.org
Cc: Roy Franz <roy.franz@linaro.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
(cherry picked from commit 204b0a1a4b92612c957a042df1a3be0e9cc79391)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/x86/boot/compressed/eboot.c

10 years agoefi: Move common EFI stub code from x86 arch code to common location
Mark Brown [Mon, 16 Jun 2014 20:21:11 +0000 (21:21 +0100)]
efi: Move common EFI stub code from x86 arch code to common location

No code changes made, just moving functions and #define from x86 arch
directory to common location.  Code is shared using #include, similar
to how decompression code is shared among architectures.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 7721da4c1ebf96ff815987011c1a0edef596b50a)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/x86/boot/compressed/eboot.c
arch/x86/boot/compressed/eboot.h

10 years agoboot, efi: Remove redundant memset()
Roy Franz [Fri, 4 Oct 2013 16:02:46 +0000 (09:02 -0700)]
boot, efi: Remove redundant memset()

Remove a redundant memset() call from efi_relocate_kernel() that
was clearing memory that would be used by BSS in non-compressed
images loaded with this function.  This clear was redundant with
the clearing done in the image itself, and also implemented incorrectly
with a 0 length.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit c158c3bf59951bbb44bd7ccca9e6665dfd1617c5)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: resolve warnings found on ARM compile
Roy Franz [Sun, 22 Sep 2013 22:45:42 +0000 (15:45 -0700)]
efi: resolve warnings found on ARM compile

warnings from gcc:
warning: label 'free_pool' defined but not used [-Wunused-label]
warning: value computed is not used [-Wunused-value]

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 4e283088bd9af0ff119d6e15bca81a83d6e8e30c)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Fix types in EFI calls to match EFI function definitions.
Roy Franz [Sun, 22 Sep 2013 22:45:41 +0000 (15:45 -0700)]
efi: Fix types in EFI calls to match EFI function definitions.

EFI calls can made directly on ARM, so the function pointers
are directly invoked.  This allows types to be checked at
compile time, so here we ensure that the parameters match
the function signature. The wrappers used by x86 prevent
any type checking.
Correct the type of chunksize to be based on native
width as specified by the EFI_FILE_PROTOCOL read()
function.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 6a5fe770d32811ffacefaa2a430cc067ecc7336c)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Renames in handle_cmdline_files() to complete generalization.
Roy Franz [Sun, 22 Sep 2013 22:45:40 +0000 (15:45 -0700)]
efi: Renames in handle_cmdline_files() to complete generalization.

Rename variables to be not initrd specific, as now the function
loads arbitrary files.  This change is exclusively renames
and comment changes to reflect the generalization.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 36f8961c963683ac12282e422dfc3db806ee0c7e)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Generalize handle_ramdisks() and rename to handle_cmdline_files().
Roy Franz [Sun, 22 Sep 2013 22:45:39 +0000 (15:45 -0700)]
efi: Generalize handle_ramdisks() and rename to handle_cmdline_files().

The handle_cmdline_files now takes the option to handle as a string,
and returns the loaded data through parameters, rather than taking
an x86 specific setup_header structure.  For ARM, this will be used
to load a device tree blob in addition to initrd images.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 46f4582e7cbc5f30127183812d4da875782518f5)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Allow efi_free() to be called with size of 0
Roy Franz [Sun, 22 Sep 2013 22:45:38 +0000 (15:45 -0700)]
efi: Allow efi_free() to be called with size of 0

Make efi_free() safely callable with size of 0, similar to free() being
callable with NULL pointers, and do nothing in that case.
Remove size checks that this makes redundant.  This also avoids some
size checks in the ARM EFI stub code that will be added as well.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 0e1cadb05bba2293b4575c8cab275313d181d94f)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: generalize efi_get_memory_map()
Roy Franz [Sun, 22 Sep 2013 22:45:36 +0000 (15:45 -0700)]
efi: generalize efi_get_memory_map()

Add arguments for returning the descriptor version and also
the memory map key.  The key is required for calling
exit_boot_services().

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 1c089c65f54b70261fdcb4c238986a979c11fad7)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Rename __get_map() to efi_get_memory_map()
Roy Franz [Sun, 22 Sep 2013 22:45:35 +0000 (15:45 -0700)]
efi: Rename __get_map() to efi_get_memory_map()

Rename function in preparation for making it more flexible
and sharing it.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 86cc653b1955c0a47681d16457f9ee9009f2561a)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Move unicode to ASCII conversion to shared function.
Roy Franz [Sun, 22 Sep 2013 22:45:33 +0000 (15:45 -0700)]
efi: Move unicode to ASCII conversion to shared function.

Move the open-coded conversion to a shared function for
use by all architectures.  Change the allocation to prefer
a high address for ARM, as this is required to avoid conflicts
with reserved regions in low memory.  We don't know the specifics
of these regions until after we process the command line and
device tree.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 5fef3870c572a30f9def07c4ded69dc37a9cf5d9)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Generalize relocate_kernel() for use by other architectures.
Roy Franz [Sun, 22 Sep 2013 22:45:32 +0000 (15:45 -0700)]
efi: Generalize relocate_kernel() for use by other architectures.

Rename relocate_kernel() to efi_relocate_kernel(), and take
parameters rather than x86 specific structure.  Add max_addr
argument as for ARM we have some address constraints that we
need to enforce when relocating the kernel.  Add alloc_size
parameter for use by ARM64 which uses an uncompressed kernel,
and needs to allocate space for BSS.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 4a9f3a7c336a6b0ffeef2523bef93e67b0921163)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Move relocate_kernel() to shared file.
Roy Franz [Sun, 22 Sep 2013 22:45:31 +0000 (15:45 -0700)]
efi: Move relocate_kernel() to shared file.

The relocate_kernel() function will be generalized and used
by all architectures, as they all have similar requirements.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit c6866d7238d4f26055de8db9c1d5a700e554b2d4)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Enforce minimum alignment of 1 page on allocations.
Roy Franz [Sun, 22 Sep 2013 22:45:30 +0000 (15:45 -0700)]
efi: Enforce minimum alignment of 1 page on allocations.

The efi_high_alloc() and efi_low_alloc() functions
use the EFI_ALLOCATE_ADDRESS option to the EFI
function allocate_pages(), which requires a minimum
of page alignment, and rejects all other requests.
The existing code could fail to allocate depending
on allocation size, as although repeated allocation
attempts were made, none were guaranteed to be page
aligned.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 38dd9c02c3f2ed461165db22b93fae7f3ddde9ac)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Rename memory allocation/free functions
Roy Franz [Sun, 22 Sep 2013 22:45:29 +0000 (15:45 -0700)]
efi: Rename memory allocation/free functions

Rename them to be more similar, as low_free() could be used to free
memory allocated by both high_alloc() and low_alloc().
high_alloc() -> efi_high_alloc()
low_alloc()  -> efi_low_alloc()
low_free()   -> efi_free()

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 40e4530a00b7d52332fe9a1361388fda8e5260da)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Add system table pointer argument to shared functions.
Roy Franz [Sun, 22 Sep 2013 22:45:28 +0000 (15:45 -0700)]
efi: Add system table pointer argument to shared functions.

Add system table pointer argument to shared EFI stub related functions
so they no longer use a global system table pointer as they did when part
of eboot.c.  For the ARM EFI stub this allows us to avoid global
variables completely and thereby not have to deal with GOT fixups.
Not having the EFI stub fixup its GOT, which is shared with the
decompressor, simplifies the relocating of the zImage to a
bootable address.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 876dc36aceb1682cb01426f507f369aec4f68c76)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: Move common EFI stub code from x86 arch code to common location
Roy Franz [Sun, 22 Sep 2013 22:45:27 +0000 (15:45 -0700)]
efi: Move common EFI stub code from x86 arch code to common location

No code changes made, just moving functions and #define from x86 arch
directory to common location.  Code is shared using #include, similar
to how decompression code is shared among architectures.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 7721da4c1ebf96ff815987011c1a0edef596b50a)
Signed-off-by: Mark Brown <broonie@linaro.org>
Conflicts:
arch/x86/boot/compressed/eboot.c
arch/x86/boot/compressed/eboot.h

10 years agoefi: x86: make efi_lookup_mapped_addr() a common function
Leif Lindholm [Thu, 5 Sep 2013 10:34:55 +0000 (11:34 +0100)]
efi: x86: make efi_lookup_mapped_addr() a common function

efi_lookup_mapped_addr() is a handy utility for other platforms than
x86. Move it from arch/x86 to drivers/firmware. Add memmap pointer
to global efi structure, and initialise it on x86.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 258f6fd738221766b512cd8c7120563b78d62829)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi: x86: ia64: provide a generic efi_config_init()
Leif Lindholm [Thu, 5 Sep 2013 10:34:54 +0000 (11:34 +0100)]
efi: x86: ia64: provide a generic efi_config_init()

Common to (U)EFI support on all platforms is the global "efi" data
structure, and the code that parses the System Table to locate
addresses to populate that structure with.

This patch adds both of these to the global EFI driver code and
removes the local definition of the global "efi" data structure from
the x86 and ia64 code.

Squashed into one big patch to avoid breaking bisection.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit 272686bf46a34f86d270cf192f68769667792026)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars: check for EFI_RUNTIME_SERVICES
Matt Fleming [Thu, 11 Jul 2013 06:30:33 +0000 (07:30 +0100)]
efivars: check for EFI_RUNTIME_SERVICES

The efivars code requires EFI runtime services to function, so check
that they are enabled.

This fixes a crash when booting with the "noefi" kernel parameter, and
also when mixing kernel and firmware "bitness", e.g. 32-bit kernel with
64-bit firmware.

Tested-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
(cherry picked from commit d320c079efd46db1be0640d00bd6723d9e738f9f)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefivars: If pstore_register fails, free unneeded pstore buffer
Lenny Szubowicz [Fri, 28 Jun 2013 20:14:11 +0000 (16:14 -0400)]
efivars: If pstore_register fails, free unneeded pstore buffer

This is patch 3/3 of a patch set that cleans up pstore_register failure paths.

If efivars fails to register with pstore, there is no point to keeping
the 4 KB buffer around. It's only used by the pstore read/write routines.

Signed-off-by: Lenny Szubowicz <lszubowi@redhat.com>
Reported-by: Naotaka Hamaguchi <n.hamaguchi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
(cherry picked from commit 0d838347f1325cebfe8b9341a4b4c1f407022231)
Signed-off-by: Mark Brown <broonie@linaro.org>
10 years agoefi, pstore: Cocci spatch "memdup.spatch"
Thomas Meyer [Sat, 1 Jun 2013 09:40:02 +0000 (11:40 +0200)]
efi, pstore: Cocci spatch "memdup.spatch"

Change a kmalloc() + memcpy() pair for a single kmemdup() call.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
(cherry picked from commit 77418921649427577143667fcf00ccb8a809762a)
Signed-off-by: Mark Brown <broonie@linaro.org>
11 years agoLinux 3.10
Linus Torvalds [Sun, 30 Jun 2013 22:13:29 +0000 (15:13 -0700)]
Linux 3.10

11 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Sun, 30 Jun 2013 22:08:15 +0000 (15:08 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

Pull another powerpc fix from Benjamin Herrenschmidt:
 "I mentioned that while we had fixed the kernel crashes, EEH error
  recovery didn't always recover...  It appears that I had a fix for
  that already in powerpc-next (with a stable CC).

  I cherry-picked it today and did a few tests and it seems that things
  now work quite well.  The patch is also pretty simple, so I see no
  reason to wait before merging it."

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/eeh: Fix fetching bus for single-dev-PE

11 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 30 Jun 2013 22:06:25 +0000 (15:06 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is a set of seven bug fixes.  Several fcoe fixes for locking
  problems, initiator issues and a VLAN API change, all of which could
  eventually lead to data corruption, one fix for a qla2xxx locking
  problem which could lead to multiple completions of the same request
  (and subsequent data corruption) and a use after free in the ipr
  driver.  Plus one minor MAINTAINERS file update"

(only six bugfixes in this pull, since I had already pulled the fcoe API
fix directly from Robert Love)

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  [SCSI] ipr: Avoid target_destroy accessing memory after it was freed
  [SCSI] qla2xxx: Fix for locking issue between driver ISR and mailbox routines
  MAINTAINERS: Fix fcoe mailing list
  libfc: extend ex_lock to protect all of fc_seq_send
  libfc: Correct check for initiator role
  libfcoe: Fix Conflicting FCFs issue in the fabric

11 years agopowerpc/eeh: Fix fetching bus for single-dev-PE
Gavin Shan [Wed, 5 Jun 2013 07:34:02 +0000 (15:34 +0800)]
powerpc/eeh: Fix fetching bus for single-dev-PE

While running Linux as guest on top of phyp, we possiblly have
PE that includes single PCI device. However, we didn't return
its PCI bus correctly and it leads to failure on recovery from
EEH errors for single-dev-PE. The patch fixes the issue.

Cc: <stable@vger.kernel.org> # v3.7+
Cc: Steve Best <sbest@us.ibm.com>
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Sun, 30 Jun 2013 00:02:48 +0000 (17:02 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

Pull powerpc fixes from Ben Herrenschmidt:
 "We discovered some breakage in our "EEH" (PCI Error Handling) code
  while doing error injection, due to a couple of regressions.  One of
  them is due to a patch (37f02195bee9 "powerpc/pci: fix PCI-e devices
  rescan issue on powerpc platform") that, in hindsight, I shouldn't
  have merged considering that it caused more problems than it solved.

  Please pull those two fixes.  One for a simple EEH address cache
  initialization issue.  The other one is a patch from Guenter that I
  had originally planned to put in 3.11 but which happens to also fix
  that other regression (a kernel oops during EEH error handling and
  possibly hotplug).

  With those two, the couple of test machines I've hammered with error
  injection are remaining up now.  EEH appears to still fail to recover
  on some devices, so there is another problem that Gavin is looking
  into but at least it's no longer crashing the kernel."

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/pci: Improve device hotplug initialization
  powerpc/eeh: Add eeh_dev to the cache during boot

11 years agoARM: dt: Only print warning, not WARN() on bad cpu map in device tree
Olof Johansson [Sat, 29 Jun 2013 23:25:14 +0000 (16:25 -0700)]
ARM: dt: Only print warning, not WARN() on bad cpu map in device tree

Due to recent changes and expecations of proper cpu bindings, there are
now cases for many of the in-tree devicetrees where a WARN() will hit
on boot due to badly formatted /cpus nodes.

Downgrade this to a pr_warn() to be less alarmist, since it's not a
new problem.

Tested on Arndale, Cubox, Seaboard and Panda ES. Panda hits the WARN
without this, the others do not.

Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agopowerpc/pci: Improve device hotplug initialization
Guenter Roeck [Mon, 10 Jun 2013 17:18:08 +0000 (10:18 -0700)]
powerpc/pci: Improve device hotplug initialization

Commit 37f02195b (powerpc/pci: fix PCI-e devices rescan issue on powerpc
platform) fixes a problem with interrupt and DMA initialization on hot
plugged devices. With this commit, interrupt and DMA initialization for
hot plugged devices is handled in the pci device enable function.

This approach has a couple of drawbacks. First, it creates two code paths
for device initialization, one for hot plugged devices and another for devices
known during the initial PCI scan. Second, the initialization code for hot
plugged devices is only called when the device is enabled, ie typically
in the probe function. Also, the platform specific setup code is called each
time pci_enable_device() is called, not only once during device discovery,
meaning it is actually called multiple times, once for devices discovered
during the initial scan and again each time a driver is re-loaded.

The visible result is that interrupt pins are only assigned to hot plugged
devices when the device driver is loaded. Effectively this changes the PCI
probe API, since pci_dev->irq and the device's dma configuration will now
only be valid after pci_enable() was called at least once. A more subtle
change is that platform specific PCI device setup is moved from device
discovery into the driver's probe function, more specifically into the
pci_enable_device() call.

To fix the inconsistencies, add new function pcibios_add_device.
Call pcibios_setup_device from pcibios_setup_bus_devices if device setup
is not complete, and from pcibios_add_device if bus setup is complete.

With this change, device setup code is moved back into device initialization,
and called exactly once for both static and hot plugged devices.

[ This also fixes a regression introduced by the above patch which
  causes dev->irq to be overwritten under some cirumstances after
  MSIs have been enabled for the device which leads to crashes due
  to the MSI core "hijacking" dev->irq to store the base MSI number
  and not the LSI. --BenH
]

Cc: Yuanquan Chen <Yuanquan.Chen@freescale.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hiroo Matsumoto <matsumoto.hiroo@jp.fujitsu.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sat, 29 Jun 2013 18:34:18 +0000 (11:34 -0700)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "This fixes a crash in the crypto layer exposed by an SCTP test tool"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: algboss - Hold ref count on larval

11 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 29 Jun 2013 18:32:05 +0000 (11:32 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm/qxl fix from Dave Airlie:
 "Bad me forgot an access check, possible security issue, but since this
  is the first kernel with it, should be fine to just put it in now"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/qxl: add missing access check for execbuffer ioctl

11 years agoFix: kernel/ptrace.c: ptrace_peek_siginfo() missing __put_user() validation
Mathieu Desnoyers [Fri, 28 Jun 2013 13:49:46 +0000 (09:49 -0400)]
Fix: kernel/ptrace.c: ptrace_peek_siginfo() missing __put_user() validation

This __put_user() could be used by unprivileged processes to write into
kernel memory.  The issue here is that even if copy_siginfo_to_user()
fails, the error code is not checked before __put_user() is executed.

Luckily, ptrace_peek_siginfo() has been added within the 3.10-rc cycle,
so it has not hit a stable release yet.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Pedro Alves <palves@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Sat, 29 Jun 2013 17:31:15 +0000 (10:31 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

Pull Ceph fix from Sage Weil:
 "This is a recently spotted regression in the snapshot behavior...

  It turns out several tests weren't being run in the nightlies so this
  took a while to spot"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: send snapshot context with writes

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sat, 29 Jun 2013 17:30:31 +0000 (10:30 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull ubifs fixes from Al Viro:
 "A couple of ubifs readdir/lseek race fixes.  Stable fodder, really
  nasty..."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  UBIFS: fix a horrid bug
  UBIFS: prepare to fix a horrid bug

11 years agoMerge tag 'for-linus-20130628' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowe...
Linus Torvalds [Sat, 29 Jun 2013 17:28:52 +0000 (10:28 -0700)]
Merge tag 'for-linus-20130628' of git://git./linux/kernel/git/dhowells/linux-mn10300

Pull two MN10300 fixes from David Howells:
 "The first fixes a problem with passing arrays rather than pointers to
  get_user() where __typeof__ then wants to declare and initialise an
  array variable which gcc doesn't like.

  The second fixes a problem whereby putting mem=xxx into the kernel
  command line causes init=xxx to get an incorrect value."

* tag 'for-linus-20130628' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-mn10300:
  mn10300: Use early_param() to parse "mem=" parameter
  mn10300: Allow to pass array name to get_user()

11 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 29 Jun 2013 17:27:19 +0000 (10:27 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "Correct an ordering issue in the tick broadcast code.  I really wish
  we'd get compensation for pain and suffering for each line of code we
  write to work around dysfunctional timer hardware."

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tick: Fix tick_broadcast_pending_mask not cleared

11 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 29 Jun 2013 17:26:50 +0000 (10:26 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fix from Ingo Molnar:
 "One more fix for a recently discovered bug"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Disable monitoring on setuid processes for regular users

11 years agoUBIFS: fix a horrid bug
Artem Bityutskiy [Fri, 28 Jun 2013 11:15:15 +0000 (14:15 +0300)]
UBIFS: fix a horrid bug

Al Viro pointed me to the fact that '->readdir()' and '->llseek()' have no
mutual exclusion, which means the 'ubifs_dir_llseek()' can be run while we are
in the middle of 'ubifs_readdir()'.

This means that 'file->private_data' can be freed while 'ubifs_readdir()' uses
it, and this is a very bad bug: not only 'ubifs_readdir()' can return garbage,
but this may corrupt memory and lead to all kinds of problems like crashes an
security holes.

This patch fixes the problem by using the 'file->f_version' field, which
'->llseek()' always unconditionally sets to zero. We set it to 1 in
'ubifs_readdir()' and whenever we detect that it became 0, we know there was a
seek and it is time to clear the state saved in 'file->private_data'.

I tested this patch by writing a user-space program which runds readdir and
seek in parallell. I could easily crash the kernel without these patches, but
could not crash it with these patches.

Cc: stable@vger.kernel.org
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoUBIFS: prepare to fix a horrid bug
Artem Bityutskiy [Fri, 28 Jun 2013 11:15:14 +0000 (14:15 +0300)]
UBIFS: prepare to fix a horrid bug

Al Viro pointed me to the fact that '->readdir()' and '->llseek()' have no
mutual exclusion, which means the 'ubifs_dir_llseek()' can be run while we are
in the middle of 'ubifs_readdir()'.

First of all, this means that 'file->private_data' can be freed while
'ubifs_readdir()' uses it.  But this particular patch does not fix the problem.
This patch is only a preparation, and the fix will follow next.

In this patch we make 'ubifs_readdir()' stop using 'file->f_pos' directly,
because 'file->f_pos' can be changed by '->llseek()' at any point. This may
lead 'ubifs_readdir()' to returning inconsistent data: directory entry names
may correspond to incorrect file positions.

So here we introduce a local variable 'pos', read 'file->f_pose' once at very
the beginning, and then stick to 'pos'. The result of this is that when
'ubifs_dir_llseek()' changes 'file->f_pos' while we are in the middle of
'ubifs_readdir()', the latter "wins".

Cc: stable@vger.kernel.org
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agomn10300: Use early_param() to parse "mem=" parameter
Akira Takeuchi [Fri, 28 Jun 2013 15:53:03 +0000 (16:53 +0100)]
mn10300: Use early_param() to parse "mem=" parameter

This fixes the problem that "init=" options may not be passed to kernel
correctly.

parse_mem_cmdline() of mn10300 arch gets rid of "mem=" string from
redboot_command_line. Then init_setup() parses the "init=" options from
static_command_line, which is a copy of redboot_command_line, and keeps
the pointer to the init options in execute_command variable.

Since the commit 026cee0 upstream (params: <level>_initcall-like kernel
parameters), static_command_line becomes overwritten by saved_command_line at
do_initcall_level(). Notice that saved_command_line is a command line
which includes "mem=" string.

As a result, execute_command may point to weird string by the length of
"mem=" parameter.
I noticed this problem when using the command line like this:

    mem=128M console=ttyS0,115200 init=/bin/sh

Here is the processing flow of command line parameters.
    start_kernel()
      setup_arch(&command_line)
         parse_mem_cmdline(cmdline_p)
           * strcpy(boot_command_line, redboot_command_line);
           * Remove "mem=xxx" from redboot_command_line.
           * *cmdline_p = redboot_command_line;
      setup_command_line(command_line) <-- command_line is redboot_command_line
        * strcpy(saved_command_line, boot_command_line)
        * strcpy(static_command_line, command_line)
      parse_early_param()
        strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
        parse_early_options(tmp_cmdline);
          parse_args("early options", cmdline, NULL, 0, 0, 0, do_early_param);
      parse_args("Booting ..", static_command_line, ...);
        init_setup() <-- save the pointer in execute_command
      rest_init()
        kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);

At this point, execute_command points to "/bin/sh" string.

    kernel_init()
      kernel_init_freeable()
        do_basic_setup()
          do_initcalls()
            do_initcall_level()
              (*) strcpy(static_command_line, saved_command_line);

Here, execute_command gets to point to "200" string !!

Signed-off-by: David Howells <dhowells@redhat.com>
11 years agomn10300: Allow to pass array name to get_user()
Akira Takeuchi [Fri, 28 Jun 2013 15:53:01 +0000 (16:53 +0100)]
mn10300: Allow to pass array name to get_user()

This fixes the following compile error:

CC block/scsi_ioctl.o
block/scsi_ioctl.c: In function 'sg_scsi_ioctl':
block/scsi_ioctl.c:449: error: invalid initializer

Signed-off-by: David Howells <dhowells@redhat.com>
11 years agodrm/qxl: add missing access check for execbuffer ioctl
Dave Airlie [Fri, 28 Jun 2013 03:27:40 +0000 (13:27 +1000)]
drm/qxl: add missing access check for execbuffer ioctl

Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
11 years agopowerpc/eeh: Add eeh_dev to the cache during boot
Thadeu Lima de Souza Cascardo [Thu, 27 Jun 2013 21:00:10 +0000 (18:00 -0300)]
powerpc/eeh: Add eeh_dev to the cache during boot

commit f8f7d63fd96ead101415a1302035137a866f8998 ("powerpc/eeh: Trace eeh
device from I/O cache") broke EEH on pseries for devices that were
present during boot and have not been hotplugged/DLPARed.

eeh_check_failure will get the eeh_dev from the cache, and will get
NULL. eeh_addr_cache_build adds the addresses to the cache, but eeh_dev
for the giving pci_device is not set yet. Just reordering the call to
eeh_addr_cache_insert_dev works fine. The ordering is similar to the one
in eeh_add_device_late.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agorbd: send snapshot context with writes
Josh Durgin [Wed, 26 Jun 2013 19:56:17 +0000 (12:56 -0700)]
rbd: send snapshot context with writes

Sending the right snapshot context with each write is required for
snapshots to work. Due to the ordering of calls, the snapshot context
is never set for any requests. This causes writes to the current
version of the image to be reflected in all snapshots, which are
supposed to be read-only.

This happens because rbd_osd_req_format_write() sets the snapshot
context based on obj_request->img_request. At this point, however,
obj_request->img_request has not been set yet, to the snapshot context
is set to NULL. Fix this by moving rbd_img_obj_request_add(), which
sets obj_request->img_request, before the osd request formatting
calls.

This resolves:
    http://tracker.ceph.com/issues/5465

Reported-by: Karol Jurak <karol.jurak@gmail.com>
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
11 years agoMerge tag 'fcoe1' into fixes
James Bottomley [Thu, 27 Jun 2013 06:08:22 +0000 (23:08 -0700)]
Merge tag 'fcoe1' into fixes

This patch fixes a critical bug that was introduced in 3.9
related to VLAN tagging FCoE frames.

11 years agoMerge tag 'fcoe' into fixes
James Bottomley [Thu, 27 Jun 2013 06:07:53 +0000 (23:07 -0700)]
Merge tag 'fcoe' into fixes

3.10 fixes

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 27 Jun 2013 05:24:37 +0000 (19:24 -1000)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Found via trinity:

    If you connect up an ipv6 socket to an ipv4 mapped address then an
    ipv6 one, sendmsg() can croak because ip6_sk_dst_check() assumes the
    route cached in the socket is an ipv6 one.  In this case there is an
    ipv4 route attached, so it gets stomped on.

    Reported by Dave Jones and Hannes Frederic Sowa, fixed by Eric
    Dumazet.

 2) AF_KEY notifications leak some kernel memory to userspace, fix from
    Mathias Krause.

 3) DLCI calls __dev_get_by_name() without proper locking, and dlci_del
    doesn't validate that the device being deleted is actually a DLCI
    one.  Fixes from Li Zefan.

 4) Length check on bluetooth l2cap information responses is wrong, each
    response type has a different lenth, so we should make sure it's in
    a given range rather than enforce one single valid length.  From
    Jaganath Kanakkassery.

 5) Receive FIFO overflow is really easy to trigger in stress scenerios
    in the sh_eth driver, but the event isn't being handled properly at
    all.  Specifically, the mask of error interrupts doesn't include the
    event so we never clear it, resulting in the driver becomming wedged
    processing an interrupt that never gets cleared.

    Fix from Sergei Shtylyov.

 6) qlcnic sleeps while holding a spinlock, use mdelay() instead of
    msleep().  From Shahed Shaikh.

 7) Missing curly braces causes SIP netfilter NAT module to always drop
    packets.  Fix from Balazs Peter Odor.

 8) ipt_ULOG in netfilter passes the wrong value to timer setup, causing
    the timer to dereference crap when it fires.  Fix from Gao Feng.

 9) Missing RCU protection around txq->axq_acq traversal in
    ath_txq_schedule().  Fix from Felix Fietkau.

10) Idle state transition test in ath9k_htc_config() is reversed, fix
    from Sujith Manoharan.

11) IPV6 forwarding handles unicast Router Alert packets incorrectly.
    It tests the wrong option state.  Previously opt->ra being non-zero
    indicated a router alert marking in the SKB, but now it's indicated
    by a bit in opt->flags.  Fix from YOSHIFUJI Hideaki.

12) SKB leak in GRE tunnel GSO handling, from Eric Dumazet.

13) get_user_pages_fast() error handling in TUN and MACVTAP use the same
    local variable for the base index and the loop iterator for page
    traversal, oops! Fix from Michael S Tsirkin.

14) ipv6_get_lladdr() can fail, and we must therefore check it's return
    value in inet6_set_iftoken().  For from Hannes Frederic Sowa.

15) If you change an interface name and meanwhile can sneak in something
    that looks up the name (like SO_BINDTODEVICE or SIOCGIFNAME) we can
    deadlock with CONFIG_PREEMPT=n.  Fix this by providing a helper
    function that properly uses raw_seqcount_begin().  From Nicolas
    Schichan.

16) Chain noise calibration test is inverted in iwlwifi, fix from
    Nikolay Martynov.

17) Properly set TX iwlwifi descriptor flags for back requests.  Fix
    from Emmanuel Grumbach.

18) We can't assume skb_transport_header() is set in xt_TCPOPTSTRAP
    module, fix from Pablo Neira Ayuso.

19) Some crummy APs don't provide the proper High Throughput info in
    association response frames.  Add a workaround by assume we'll use
    whatever is in the beacon/probe.  Fix from Johannes Berg.

20) mac80211 call to rate_idx_match_mask() swaps two arguments (mask and
    channel width).  Fix from Simon Wunderlich.

21) xt_TCPMSS (like xt_TCPOPTSTRAP) must not try to handle fragmented
    frames.  Fix from Phil Oester.

22) Fix rate control regression causing iwlwifi/iwlegacy chips to use
    1Mbit/s on pre-11n networks.  From Moshe Benji and Stanslaw Gruszka.

23) Disable brcmsmac power-save functions, they cause regressions.  From
    Arend van Spriel.

24) Enforce a sane minimum MTU in l2cap_build_cmd() otherwise we can
    easily crash.  Fix from Anderson Lizardo.

25) If a learning packet arrives during vxlan_stop() we crash, easily
    fixed by checking netif_running().  From Stephen Hemminger.

26) Static vxlan FDB entries should not be migrated, also from Stephen.

27) skb_clone() failures not handled in vxlan_xmit(), oops.  Also from
    Stephen.

28) Add minimal driver for AR816x/AR817x ethernet chips, from Johannes
    Berg.

29) Fix regression in userspace VLAN acceleration control, added by the
    802.1ad support changes.  Fix from Fernando Luis Vazquez Cao.

30) Interval selection for MLD queries in the bridging code was
    reversed.  Fix from Linus Lüssing.

31) ipv6's ndisc_send_redirect() erroneously writes to the packet we
    received not the packet we are building to send out.  Fix from
    Matthias Schiffer.

32) Don't free netdev before unregistering it, in usb_8dev can driver.
    From Marc Kleine-Budde.

33) Fix nl80211 attribute buffer races, from Johannes Berg.

34) Although netlink_diag.h is under uapi/ it isn't present in Kbuild.
    From Stephen Hemminger.

35) Wrong address and family passed to MD5 key lookups in TCP, from
    Aydin Arik.

36) phy_type attribute created by SFC driver should not be writable.
    From Ben Hutchings.

37) Receive/Transmit queue allocations in pxa168_eth and mv643xx_eth
    should use kzalloc().  Otherwise if setup fails half-way, we'll
    dereference garbage when trying to teardown the rings.  From Lubomir
    Rintel.

38) Fix double-allocation of dst (resulting in unfreeable net device) in
    ipv6's init_loopback().  From Gao Feng.

39) Fix fragmentation handling SKB leak in netfilter conntrack, we were
    freeing the wrong skb pointer.  From Phil Oester.

40) Don't report "-1" (SPEED_UNKNOWN) in bond_miimon_commit(), from
    Nikolay Aleksandrov.

41) davinci_cpdma doesn't check for DMA mapping errors, letting the
    device scribble to random addresses.  From Sebastian Siewior.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (69 commits)
  dlci: validate the net device in dlci_del()
  dlci: acquire rtnl_lock before calling __dev_get_by_name()
  af_key: fix info leaks in notify messages
  ipv6: ip6_sk_dst_check() must not assume ipv6 dst
  net: fix kernel deadlock with interface rename and netdev name retrieval.
  net/tg3: Avoid delay during MMIO access
  ipv6: check return value of ipv6_get_lladdr
  macvtap: fix recovery from gup errors
  tun: fix recovery from gup errors
  gre: fix a possible skb leak
  ipv6: Process unicast packet with Router Alert by checking flag in skb.
  ath9k_htc: Handle IDLE state transition properly
  ath9k: fix an RCU issue in calling ieee80211_get_tx_rates
  netfilter: ipt_ULOG: fix incorrect setting of ulog timer
  netfilter: ctnetlink: send event when conntrack label was modified
  netfilter: nf_nat_sip: fix mangling
  qlcnic: Do not sleep while holding spinlock
  drivers: net: cpsw: fix compilation error with cpsw driver
  tcp: doc : fix the syncookies default value
  sh_eth: fix misreporting of transmit abort
  ...

11 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Thu, 27 Jun 2013 05:23:15 +0000 (19:23 -1000)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull i915 drm fixes from Dave Airlie:
 "These should be the last two fixes for i915, one is for a fence leak
  killing X on some older GPUs, and one is a late regression partial
  revert for an swiotlb/xen/i915 interaction, Konrad has promised to
  figure out the proper answer, and this patch is the best thing to do
  at this stage to avoid regressing"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/i915: make compact dma scatter lists creation work with SWIOTLB backend.
  drm/i915: Restore fences after resume and GPU resets

11 years agodlci: validate the net device in dlci_del()
Zefan Li [Wed, 26 Jun 2013 07:31:58 +0000 (15:31 +0800)]
dlci: validate the net device in dlci_del()

We triggered an oops while running trinity with 3.4 kernel:

BUG: unable to handle kernel paging request at 0000000100000d07
IP: [<ffffffffa0109738>] dlci_ioctl+0xd8/0x2d4 [dlci]
PGD 640c0d067 PUD 0
Oops: 0000 [#1] PREEMPT SMP
CPU 3
...
Pid: 7302, comm: trinity-child3 Not tainted 3.4.24.09+ 40 Huawei Technologies Co., Ltd. Tecal RH2285          /BC11BTSA
RIP: 0010:[<ffffffffa0109738>]  [<ffffffffa0109738>] dlci_ioctl+0xd8/0x2d4 [dlci]
...
Call Trace:
  [<ffffffff8137c5c3>] sock_ioctl+0x153/0x280
  [<ffffffff81195494>] do_vfs_ioctl+0xa4/0x5e0
  [<ffffffff8118354a>] ? fget_light+0x3ea/0x490
  [<ffffffff81195a1f>] sys_ioctl+0x4f/0x80
  [<ffffffff81478b69>] system_call_fastpath+0x16/0x1b
...

It's because the net device is not a dlci device.

Reported-by: Li Jinyue <lijinyue@huawei.com>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agodlci: acquire rtnl_lock before calling __dev_get_by_name()
Zefan Li [Wed, 26 Jun 2013 07:29:54 +0000 (15:29 +0800)]
dlci: acquire rtnl_lock before calling __dev_get_by_name()

Otherwise the net device returned can be freed at anytime.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoaf_key: fix info leaks in notify messages
Mathias Krause [Wed, 26 Jun 2013 21:52:30 +0000 (23:52 +0200)]
af_key: fix info leaks in notify messages

key_notify_sa_flush() and key_notify_policy_flush() miss to initialize
the sadb_msg_reserved member of the broadcasted message and thereby
leak 2 bytes of heap memory to listeners. Fix that.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoipv6: ip6_sk_dst_check() must not assume ipv6 dst
Eric Dumazet [Wed, 26 Jun 2013 11:15:07 +0000 (04:15 -0700)]
ipv6: ip6_sk_dst_check() must not assume ipv6 dst

It's possible to use AF_INET6 sockets and to connect to an IPv4
destination. After this, socket dst cache is a pointer to a rtable,
not rt6_info.

ip6_sk_dst_check() should check the socket dst cache is IPv6, or else
various corruptions/crashes can happen.

Dave Jones can reproduce immediate crash with
trinity -q -l off -n -c sendmsg -c connect

With help from Hannes Frederic Sowa

Reported-by: Dave Jones <davej@redhat.com>
Reported-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agonet: fix kernel deadlock with interface rename and netdev name retrieval.
Nicolas Schichan [Wed, 26 Jun 2013 15:23:42 +0000 (17:23 +0200)]
net: fix kernel deadlock with interface rename and netdev name retrieval.

When the kernel (compiled with CONFIG_PREEMPT=n) is performing the
rename of a network interface, it can end up waiting for a workqueue
to complete. If userland is able to invoke a SIOCGIFNAME ioctl or a
SO_BINDTODEVICE getsockopt in between, the kernel will deadlock due to
the fact that read_secklock_begin() will spin forever waiting for the
writer process (the one doing the interface rename) to update the
devnet_rename_seq sequence.

This patch fixes the problem by adding a helper (netdev_get_name())
and using it in the code handling the SIOCGIFNAME ioctl and
SO_BINDTODEVICE setsockopt.

The netdev_get_name() helper uses raw_seqcount_begin() to avoid
spinning forever, waiting for devnet_rename_seq->sequence to become
even. cond_resched() is used in the contended case, before retrying
the access to give the writer process a chance to finish.

The use of raw_seqcount_begin() will incur some unneeded work in the
reader process in the contended case, but this is better than
deadlocking the system.

Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoMerge tag 'regulator-v3.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 26 Jun 2013 19:18:37 +0000 (09:18 -1000)]
Merge tag 'regulator-v3.10-rc7' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "Fix module loading for tps6586x.

  A simple one liner fix to make module loading work for distros
  (product specific kernels tend to have things built in)"

* tag 'regulator-v3.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  mfd: tps6586x: correct device name of the regulator cell

11 years agoMerge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux
Linus Torvalds [Wed, 26 Jun 2013 19:08:58 +0000 (09:08 -1000)]
Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux

Pull GPIO regression fix from Grant Likely:
 "It took a while to work out the correct solution to this regression.
  It is sorted now.  This branch was constructed and tested by Tony.
  I've verified that it builds and signed the tag"

* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux:
  gpio/omap: don't use linear domain mapping for OMAP1

11 years agoMerge tag 'pm+acpi-3.10-late' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Wed, 26 Jun 2013 18:55:03 +0000 (08:55 -1000)]
Merge tag 'pm+acpi-3.10-late' of git://git./linux/kernel/git/rafael/linux-pm

Pull late power management and ACPI fixes from Rafael Wysocki:
 "Sorry about the timing of this, but ACPI-based docking stations with
  PCI devices on them and ATA bays would be hardly usable with 3.10
  without it.  We've been working on these fixes for the last couple of
  weeks and everyone involved appears to be reasonably comfortable with
  them now.

  The PM part is one fix for a cpufreq regression introduced recently

   - Fix for an ACPI dock regression introduced by the recent rework of
     the ACPI-based PCI hotplug code (acpiphp) that caused it to be
     initialized before the ACPI dock driver, which is incorrect (ACPI
     dock has to be initialized before acpiphp so that acpiphp can
     register PCI devices on docking stations with it for PCI hotplug on
     re-dock to work).  From Jiang Liu.

   - Fix for PCI resources allocation in the ACPI-based PCI hotplug code
     (acpiphp) that makes it use the same PCI resources assignment rules
     during runtime hotplug that are used during boot (the BIOS' choices
     are now respected in both cases).  This prevents PCI resource
     allocation failures during hotplug from happening in some cases.
     From Jiang Liu.

   - Fix for ordering and synchronization issues during hot-removal of
     PCI devices on docking stations.  It makes the ACPI dock code carry
     out the PCI devices removal synchronously during undock instead of
     spawning a separate asynchronous work item to remove each of them
     without even bothering to wait for all those work items to
     complete.  The hot-addition part is changed analogously.

   - Fix for a regression (introduced a few releases ago) that removed
     the code to register a hotplug notificaion handler for for ATA
     ports/devices inadvertently which prevented ATA bays hotplug from
     working.  The missing code is added back with some improvements.
     From Aaron Lu.

   - Fix for a recent cpufreq regression causing a NULL pointer
     dereference to trigger in od_set_powersave_bias() in some
     situations from Jacob Shin"

* tag 'pm+acpi-3.10-late' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: fix NULL pointer deference at od_set_powersave_bias()
  libata-acpi: add back ACPI based hotplug functionality
  ACPI / dock / PCI: Synchronous handling of dock events for PCI devices
  PCI / ACPI: Use boot-time resource allocation rules during hotplug
  ACPI / dock: Initialize ACPI dock subsystem upfront

11 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 26 Jun 2013 18:51:44 +0000 (08:51 -1000)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Three small fixlets"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  hw_breakpoint: Use cpu_possible_mask in {reserve,release}_bp_slot()
  hw_breakpoint: Fix cpu check in task_bp_pinned(cpu)
  kprobes: Fix arch_prepare_kprobe to handle copy insn failures

11 years agoMerge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Linus Torvalds [Wed, 26 Jun 2013 18:50:39 +0000 (08:50 -1000)]
Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM fixes from Russell King:
 "Another round of ARM fixes.  Largest one is the second half of the
  PJ4B fix which was pushed in the previous -rc - this one was delayed
  because its original caused a build regression while trying to fix a
  regression!

  As ever, noMMU gets forgotten when fixing problems on MMU, so we have
  a noMMU fix for a previous fix included in this set.

  A couple of fixes from Lorenzo for problems with the ARM DT CPU code,
  and a one liner to remove the buggy 'wait for interrupt' with FA526
  cores"

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7773/1: PJ4B: Add support for errata 4742
  ARM: 7772/1: Fix missing flush_kernel_dcache_page() for noMMU
  ARM: 7763/1: kernel: fix __cpu_logical_map default initialization
  ARM: 7762/1: kernel: fix arm_dt_init_cpu_maps() to skip non-cpu nodes
  ARM: 7760/1: cpu_fa526_do_idle: remove WFI

11 years agoMerge tag 'critical_fix_for_3.9' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 26 Jun 2013 18:48:53 +0000 (08:48 -1000)]
Merge tag 'critical_fix_for_3.9' of git://git./linux/kernel/git/rwlove/fcoe

Pull FCoE fix from Robert W Love:
 "This patch fixes a critical bug that was introduced in 3.9 related to
  VLAN tagging FCoE frames"

* tag 'critical_fix_for_3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rwlove/fcoe:
  fcoe: Use correct API to set vlan tag for FCoE Ethertype skbs

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Wed, 26 Jun 2013 18:47:46 +0000 (08:47 -1000)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

Pull Ceph fix from Sage Weil:
 "This fixes another problem with using v2 images on 3.10 due to the
  order in which fields are read from the image header.

  Hopefully this is the last one"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: fetch object order before using it

11 years agoperf: Disable monitoring on setuid processes for regular users
Stephane Eranian [Thu, 20 Jun 2013 09:36:28 +0000 (11:36 +0200)]
perf: Disable monitoring on setuid processes for regular users

There was a a bug in setup_new_exec(), whereby
the test to disabled perf monitoring was not
correct because the new credentials for the
process were not yet committed and therefore
the get_dumpable() test was never firing.

The patch fixes the problem by moving the
perf_event test until after the credentials
are committed.

Signed-off-by: Stephane Eranian <eranian@google.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
11 years agogpio/omap: don't use linear domain mapping for OMAP1
Javier Martinez Canillas [Mon, 24 Jun 2013 15:13:23 +0000 (17:13 +0200)]
gpio/omap: don't use linear domain mapping for OMAP1

Commit ede4d7a5 ("gpio/omap: convert gpio irq domain to linear mapping")
converted the OMAP GPIO driver to use a linear mapping for the GPIO IRQ
domain instead of using a legacy mapping. Not using a legacy mapping has
a number of benefits but it requires the platform to support SPARSE_IRQ
which currently is not supported on OMAP1.

So this change caused a regression on OMAP1 platforms [1].

Since this issue is not present on all OMAP2+ platforms, there is no need to
revert the driver to use legacy domain mapping for all the platforms.

[1]: http://www.mail-archive.com/linux-omap@vger.kernel.org/msg89005.html

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>
11 years agonet/tg3: Avoid delay during MMIO access
Gavin Shan [Tue, 25 Jun 2013 07:24:32 +0000 (15:24 +0800)]
net/tg3: Avoid delay during MMIO access

When the EEH error is the result of a fenced host bridge, MMIO accesses
can be very slow (milliseconds) to timeout and return all 1's,
thus causing the driver various timeout loops to take way too long and
trigger soft-lockup warnings (in addition to taking minutes to recover).

It might be worthwhile to check if for any of these cases, ffffffff is
a valid possible value, and if not, bail early since that means the HW
is either gone or isolated. In the meantime, checking that the PCI channel
is offline would be workaround of the problem.

Cc: <stable@vger.kernel.org> # v3.0+
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoipv6: check return value of ipv6_get_lladdr
Hannes Frederic Sowa [Mon, 24 Jun 2013 19:42:40 +0000 (21:42 +0200)]
ipv6: check return value of ipv6_get_lladdr

We should check the return value of ipv6_get_lladdr in inet6_set_iftoken.

A possible situation, which could leave ll_addr unassigned is, when
the user removed her link-local address but a global scoped address was
already set. In this case the interface would still be IF_READY and not
dead. In that case the RS source address is some value from the stack.

v2: Daniel Borkmann noted a small indent inconstancy; no semantic
changes.

Cc: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Reviewed-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agomacvtap: fix recovery from gup errors
Michael S. Tsirkin [Sun, 23 Jun 2013 14:26:58 +0000 (17:26 +0300)]
macvtap: fix recovery from gup errors

get user pages might fail partially in macvtap zero copy
mode. To recover we need to put all pages that we got,
but code used a wrong index resulting in double-free
errors.

Reported-by: Brad Hubbard <bhubbard@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agotun: fix recovery from gup errors
Michael S. Tsirkin [Sun, 23 Jun 2013 14:19:03 +0000 (17:19 +0300)]
tun: fix recovery from gup errors

get user pages might fail partially in tun zero copy
mode. To recover we need to put all pages that we got,
but code used a wrong index resulting in double-free
errors.

Reported-by: Brad Hubbard <bhubbard@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agogre: fix a possible skb leak
Eric Dumazet [Mon, 24 Jun 2013 13:26:00 +0000 (06:26 -0700)]
gre: fix a possible skb leak

commit 68c331631143 ("v4 GRE: Add TCP segmentation offload for GRE")
added a possible skb leak, because it frees only the head of segment
list, in case a skb_linearize() call fails.

This patch adds a kfree_skb_list() helper to fix the bug.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Pravin B Shelar <pshelar@nicira.com>
Cc: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoMerge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville...
David S. Miller [Tue, 25 Jun 2013 23:04:35 +0000 (16:04 -0700)]
Merge branch 'for-davem' of git://git./linux/kernel/git/linville/wireless

John W. Linville says:

====================
A few more late-breaking fixes hoping for 3.10...

Regarding the Bluetooth fix, Gustavo says:

"A important fix to 3.10, this patch fixes an issues that was preventing
the l2cap info response command to be handled properly."

Also for that Bluetooth fix, Johan adds:

"Once the code gives up parsing this PDU it also gives up essential
parts of the L2CAP connection creation process, i.e. without this
patch the stack will fail to establish connections properly."

Moving onto ath9k, Felix Fietkau fixes an RCU locking issue in
the transmit path.  As for ath9k_htc, Sujith Manoharan fixes some
authentication timeouts by ensuring that a chip reset is done when
IDLE is turned off.

I think these are all micro-fixes that shouldn't cause any trouble.
Please let me know if there are problems!
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoipv6: Process unicast packet with Router Alert by checking flag in skb.
YOSHIFUJI Hideaki / 吉藤英明 [Sat, 22 Jun 2013 02:13:13 +0000 (11:13 +0900)]
ipv6: Process unicast packet with Router Alert by checking flag in skb.

Router Alert option is marked in skb.
Previously, IP6CB(skb)->ra was set to positive value for such packets.
Since commit dd3332bf ("ipv6: Store Router Alert option in IP6CB
directly."), IP6SKB_ROUTERALERT is set in IP6CB(skb)->flags, and
the value of Router Alert option (in network byte order) is set
to IP6CB(skb)->ra for such packets.

Multicast forwarding path uses that flag and value, but unicast
forwarding path does not use the flag and misuses IP6CB(skb)->ra
value.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
11 years agoMerge branch 'pm-fixes'
Rafael J. Wysocki [Tue, 25 Jun 2013 20:47:07 +0000 (22:47 +0200)]
Merge branch 'pm-fixes'

* pm-fixes:
  cpufreq: fix NULL pointer deference at od_set_powersave_bias()

11 years agoMerge branch 'acpi-fixes'
Rafael J. Wysocki [Tue, 25 Jun 2013 20:46:47 +0000 (22:46 +0200)]
Merge branch 'acpi-fixes'

* acpi-fixes:
  libata-acpi: add back ACPI based hotplug functionality
  ACPI / dock / PCI: Synchronous handling of dock events for PCI devices
  PCI / ACPI: Use boot-time resource allocation rules during hotplug
  ACPI / dock: Initialize ACPI dock subsystem upfront

11 years agocpufreq: fix NULL pointer deference at od_set_powersave_bias()
Jacob Shin [Tue, 25 Jun 2013 20:42:37 +0000 (22:42 +0200)]
cpufreq: fix NULL pointer deference at od_set_powersave_bias()

When initializing the default powersave_bias value, we need to first
make sure that this policy is running the ondemand governor.

Reported-and-tested-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>