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Booting a kernel with CONFIG_EFI enabled on a non-EFI system caused
an oops with the current UEFI support code.
Add the required test to prevent this.
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 74bcc2499291d38b6253f9dbd6af33a195222208)
Signed-off-by: Mark Brown <broonie@linaro.org>
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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
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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>
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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>
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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>
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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>
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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
Conflicts:
arch/arm64/kernel/Makefile
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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
Conflicts:
arch/x86/platform/efi/efi.c
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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>
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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
Conflicts:
include/linux/efi.h
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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>
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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>
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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>
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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>
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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>
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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>
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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
Conflicts:
arch/x86/include/asm/efi.h
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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>
Conflicts:
arch/x86/boot/compressed/eboot.h
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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>
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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>
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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
Conflicts:
drivers/firmware/efi/Kconfig
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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>
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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>
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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>
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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>
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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
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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
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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
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"Switch mnt_hash to hlist, turning the races between __lookup_mnt() and
hash modifications into false negatives from __lookup_mnt() (instead
of hangs)"
On the false negatives from __lookup_mnt():
"The *only* thing we care about is not getting stuck in __lookup_mnt().
If it misses an entry because something in front of it just got moved
around, etc, we are fine. We'll notice that mount_lock mismatch and
that'll be it"
* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
switch mnt_hash to hlist
don't bother with propagate_mnt() unless the target is shared
keep shadowed vfsmounts together
resizable namespace.c hashes
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I am the new kernel tree Documentation maintainer (except for parts that
are handled by other people, of course).
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Rob Landley <rob@landley.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
"Some more updates for the input subsystem.
You will get a fix for race in mousedev that has been causing quite a
few oopses lately and a small fixup for force feedback support in
evdev"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: mousedev - fix race when creating mixed device
Input: don't modify the id of ioctl-provided ff effect on upload failure
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It its possible to configure your PAM stack to refuse login if audit
messages (about the login) were unable to be sent. This is common in
many distros and thus normal configuration of many containers. The PAM
modules determine if audit is enabled/disabled in the kernel based on
the return value from sending an audit message on the netlink socket.
If userspace gets back ECONNREFUSED it believes audit is disabled in the
kernel. If it gets any other error else it refuses to let the login
proceed.
Just about ever since the introduction of namespaces the kernel audit
subsystem has returned EPERM if the task sending a message was not in
the init user or pid namespace. So many forms of containers have never
worked if audit was enabled in the kernel.
BUT if the container was not in net_init then the kernel network code
would send ECONNREFUSED (instead of the audit code sending EPERM). Thus
by pure accident/dumb luck/bug if an admin configured the PAM stack to
reject all logins that didn't talk to audit, but then ran the login
untility in the non-init_net namespace, it would work!! Clearly this was
a bug, but it is a bug some people expected.
With the introduction of network namespace support in 3.14-rc1 the two
bugs stopped cancelling each other out. Now, containers in the
non-init_net namespace refused to let users log in (just like PAM was
configfured!) Obviously some people were not happy that what used to let
users log in, now didn't!
This fix is kinda hacky. We return ECONNREFUSED for all non-init
relevant namespaces. That means that not only will the old broken
non-init_net setups continue to work, now the broken non-init_pid or
non-init_user setups will 'work'. They don't really work, since audit
isn't logging things. But it's what most users want.
In 3.15 we should have patches to support not only the non-init_net
(3.14) namespace but also the non-init_pid and non-init_user namespace.
So all will be right in the world. This just opens the doors wide open
on 3.14 and hopefully makes users happy, if not the audit system...
Reported-by: Andre Tomt <andre@tomt.net>
Reported-by: Adam Richter <adam_richter2004@yahoo.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Use cmpxchg() to atomically set i_flags instead of clearing out the
S_IMMUTABLE, S_APPEND, etc. flags and then setting them from the
EXT4_IMMUTABLE_FL, EXT4_APPEND_FL flags, since this opens up a race
where an immutable file has the immutable flag cleared for a brief
window of time.
Reported-by: John Sullivan <jsrhbz@kanargh.force9.co.uk>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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fixes RCU bug - walking through hlist is safe in face of element moves,
since it's self-terminating. Cyclic lists are not - if we end up jumping
to another hash chain, we'll loop infinitely without ever hitting the
original list head.
[fix for dumb braino folded]
Spotted by: Max Kellermann <mk@cm4all.com>
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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If the dest_mnt is not shared, propagate_mnt() does nothing -
there's no mounts to propagate to and thus no copies to create.
Might as well don't bother calling it in that case.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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preparation to switching mnt_hash to hlist
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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* switch allocation to alloc_large_system_hash()
* make sizes overridable by boot parameters (mhash_entries=, mphash_entries=)
* switch mountpoint_hashtable from list_head to hlist_head
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Ingo Molnar:
"A late breaking fix from John. (The bug fixed has a hard lockup
potential, but that was not observed, warnings were)"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: Revert to calling clock_was_set_delayed() while in irq context
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git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph fix from Sage Weil:
"This drops a bad assert that a few users have been hitting but we've
only recently been able to track down"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
rbd: drop an unsafe assertion
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We should not be using static variable mousedev_mix in methods that can be
called before that singleton gets assigned. While at it let's add open and
close methods to mousedev structure so that we do not need to test if we
are dealing with multiplexor or normal device and simply call appropriate
method directly.
This fixes: https://bugzilla.kernel.org/show_bug.cgi?id=71551
Reported-by: GiulioDP <depasquale.giulio@gmail.com>
Tested-by: GiulioDP <depasquale.giulio@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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If a new (id == -1) ff effect was uploaded from userspace,
ff-core.c::input_ff_upload() will have assigned a positive number to the
new effect id. Currently, evdev.c::evdev_do_ioctl() will save this new id
to userspace, regardless of whether the upload succeeded or not.
On upload failure, this can be confusing because the dev->ff->effects[]
array will not contain an element at the index of that new effect id.
This patch fixes this by leaving the id unchanged after upload fails.
Note: Unfortunately applications should still expect changed effect id for
quite some time.
This has been discussed on:
http://www.mail-archive.com/linux-input@vger.kernel.org/msg08513.html
("ff-core effect id handling in case of a failed effect upload")
Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Elias Vanderstuyft <elias.vds@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Olivier Bonvalet reported having repeated crashes due to a failed
assertion he was hitting in rbd_img_obj_callback():
Assertion failure in rbd_img_obj_callback() at line 2165:
rbd_assert(which >= img_request->next_completion);
With a lot of help from Olivier with reproducing the problem
we were able to determine the object and image requests had
already been completed (and often freed) at the point the
assertion failed.
There was a great deal of discussion on the ceph-devel mailing list
about this. The problem only arose when there were two (or more)
object requests in an image request, and the problem was always
seen when the second request was being completed.
The problem is due to a race in the window between setting the
"done" flag on an object request and checking the image request's
next completion value. When the first object request completes, it
checks to see if its successor request is marked "done", and if
so, that request is also completed. In the process, the image
request's next_completion value is updated to reflect that both
the first and second requests are completed. By the time the
second request is able to check the next_completion value, it
has been set to a value *greater* than its own "which" value,
which caused an assertion to fail.
Fix this problem by skipping over any completion processing
unless the completing object request is the next one expected.
Test only for inequality (not >=), and eliminate the bad
assertion.
Tested-by: Olivier Bonvalet <ob@daevel.fr>
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Ilya Dryomov <ilya.dryomov@inktank.com>
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Pull networking fixes from David Miller:
1) We've discovered a common error in several networking drivers, they
put VLAN offload features into ->vlan_features, which would suggest
that they support offloading 2 or more levels of VLAN encapsulation.
Not only do these devices not do that, but we don't have the
infrastructure yet to handle that at all.
Fixes from Vlad Yasevich.
2) Fix tcpdump crash with bridging and vlans, also from Vlad.
3) Some MAINTAINERS updates for random32 and bonding.
4) Fix late reseeds of prandom generator, from Sasha Levin.
5) Bridge doesn't handle stacked vlans properly, fix from Toshiaki
Makita.
6) Fix deadlock in openvswitch, from Flavio Leitner.
7) get_timewait4_sock() doesn't report delay times correctly, fix from
Eric Dumazet.
8) Duplicate address detection and addrconf verification need to run in
contexts where RTNL can be obtained. Move them to run from a
workqueue. From Hannes Frederic Sowa.
9) Fix route refcount leaking in ip tunnels, from Pravin B Shelar.
10) Don't return -EINTR from non-blocking recvmsg() on AF_UNIX sockets,
from Eric Dumazet.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (28 commits)
vlan: Warn the user if lowerdev has bad vlan features.
veth: Turn off vlan rx acceleration in vlan_features
ifb: Remove vlan acceleration from vlan_features
qlge: Do not propaged vlan tag offloads to vlans
bridge: Fix crash with vlan filtering and tcpdump
net: Account for all vlan headers in skb_mac_gso_segment
MAINTAINERS: bonding: change email address
MAINTAINERS: bonding: change email address
ipv6: move DAD and addrconf_verify processing to workqueue
tcp: fix get_timewait4_sock() delay computation on 64bit
openvswitch: fix a possible deadlock and lockdep warning
bridge: Fix handling stacked vlan tags
bridge: Fix inabillity to retrieve vlan tags when tx offload is disabled
vhost: validate vhost_get_vq_desc return value
vhost: fix total length when packets are too short
random32: avoid attempt to late reseed if in the middle of seeding
random32: assign to network folks in MAINTAINERS
net/mlx4_core: pass pci_device_id.driver_data to __mlx4_init_one during reset
core, nfqueue, openvswitch: Orphan frags in skb_zerocopy and handle errors
vlan: Set hard_header_len according to available acceleration
...
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Vlad Yasevich says:
====================
Audit all drivers for correct vlan_features.
Some drivers set vlan acceleration features in vlan_features. This causes
issues with Q-in-Q/802.1ad configurations.
Audit all the drivers for correct vlan_features. Fix broken ones.
Add a warning to vlan code to help catch future offenders.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some drivers incorrectly assign vlan acceleration features to
vlan_features thus causing issues for Q-in-Q vlan configurations.
Warn the user of such cases.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For completeness, turn off vlan rx acceleration in vlan_features so
that it doesn't show up on q-in-q setups.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Do not include vlan acceleration features in vlan_features as that
precludes correct Q-in-Q operation.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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qlge driver turns off NETIF_F_HW_CTAG_FILTER, but forgets to
turn off HW_CTAG_TX and HW_CTAG_RX on vlan devices. With the
current settings, q-in-q will only generate a single vlan header.
Remember to mask off CTAG_TX and CTAG_RX features in vlan_features.
CC: Shahed Shaikh <shahed.shaikh@qlogic.com>
CC: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
CC: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When the vlan filtering is enabled on the bridge, but
the filter is not configured on the bridge device itself,
running tcpdump on the bridge device will result in a
an Oops with NULL pointer dereference. The reason
is that br_pass_frame_up() will bypass the vlan
check because promisc flag is set. It will then try
to get the table pointer and process the packet based
on the table. Since the table pointer is NULL, we oops.
Catch this special condition in br_handle_vlan().
Reported-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
CC: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
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