This macro relies on a local variable having a specific name. Replace
it with a new helper function, s626_mc_test().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since we are programming SR register 18, better name structs/arrays
accordingly to avoid confusion.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since we only access the third row, we can delete the others.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
SR1B register value is always 3 regardless of video card or RAM type.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Inside vb_init, IF_DEF_LVDS tells only if the vbios was succesfully read
on XG21. Rearrange the code so that we don't need to set or care about
this flag.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
IF_DEF_LVDS can be set only on XG21.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Testing the arm chromebook config against the upstream
kernel produces a linker error for the zsmalloc module from
staging. The symbol flush_tlb_kernel_range is not available
there. Fix this by removing the reimplementation of
unmap_kernel_range in the zsmalloc module and using the
function directly. The unmap_kernel_range function is not
usable by modules, so also disallow building the driver as a
module for now.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Several sed -i '/^$/{ N /^\n$/ D }' drivers/staging/vt6656/*.[ch]
Signed-off-by: Andres More <more.andres@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Here are some USB fixes to resolve issues reported recently, as well as a new
device id for the ftdi_sio driver.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg Kroah-Hartman:
"Here are some USB fixes to resolve issues reported recently, as well
as a new device id for the ftdi_sio driver."
* tag 'usb-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: ftdi_sio: Add support for Mitsubishi FX-USB-AW/-BD
usb: Fix compile error by selecting USB_OTG_UTILS
USB: serial: fix hang when opening port
USB: EHCI: fix bug in iTD/siTD DMA pool allocation
xhci: Don't warn on empty ring for suspended devices.
usb: xhci: Fix TRB transfer length macro used for Event TRB.
usb/acpi: binding xhci root hub usb port with ACPI
usb: add find_raw_port_number callback to struct hc_driver()
usb: xhci: fix build warning
Here are some tty/serial driver fixes for 3.9.
The big thing here is the fix for the huge mess we caused renaming the 8250
driver accidentally in the 3.7 kernel release, without realizing that there
were users of the module options that suddenly broke. This is now resolved,
and, to top the injury off, we have a backwards-compatible option for those
users who got used to the new name since 3.7. Ugh, sorry about that.
Other than that, some other minor fixes for issues that have been reported by
users.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY/serial fixes from Greg Kroah-Hartman:
"Here are some tty/serial driver fixes for 3.9.
The big thing here is the fix for the huge mess we caused renaming the
8250 driver accidentally in the 3.7 kernel release, without realizing
that there were users of the module options that suddenly broke. This
is now resolved, and, to top the injury off, we have a backwards-
compatible option for those users who got used to the new name since
3.7. Ugh, sorry about that.
Other than that, some other minor fixes for issues that have been
reported by users."
* tag 'tty-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
Xilinx: ARM: UART: clear pending irqs before enabling irqs
TTY: 8250, deprecated 8250_core.* options
TTY: 8250, revert module name change
serial: 8250_pci: Add WCH CH352 quirk to avoid Xscale detection
tty: atmel_serial_probe(): index of atmel_ports[] fix
Here are two tiny staging driver fixes to resolve issues that have been
reported.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg Kroah-Hartman:
"Here are two tiny staging driver fixes to resolve issues that have
been reported."
* tag 'staging-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: comedi: s626: fix continuous acquisition
staging: zcache: fix typo "64_BIT"
Here are two fixes for sysfs that resolve issues that have been found by the
Trinity fuzz tool, causing oopses in sysfs. They both have been in linux-next
for a while to ensure that they do not cause any other problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull sysfs fixes from Greg Kroah-Hartman:
"Here are two fixes for sysfs that resolve issues that have been found
by the Trinity fuzz tool, causing oopses in sysfs. They both have
been in linux-next for a while to ensure that they do not cause any
other problems."
* tag 'driver-core-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
sysfs: handle failure path correctly for readdir()
sysfs: fix race between readdir and lseek
Here are some small char/misc driver fixes that resolve issues recently
reported against the 3.9-rc kernels. All have been in linux-next for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg Kroah-Hartman:
"Here are some small char/misc driver fixes that resolve issues
recently reported against the 3.9-rc kernels. All have been in
linux-next for a while."
* tag 'char-misc-3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
VMCI: Fix process-to-process DRGAMs.
mei: ME hardware reset needs to be synchronized
mei: add mei_stop function to stop mei device
extcon: max77693: Initialize register of MUIC device to bring up it without platform data
extcon: max77693: Fix bug of wrong pointer when platform data is not used
extcon: max8997: Check the pointer of platform data to protect null pointer error
- Fix for a recent cpufreq regression related to acpi-cpufreq and
suspend/resume from Viresh Kumar.
- cpufreq stats reference counting fix from Viresh Kumar.
- intel_pstate driver fixes from Dirk Brandewie and
Konrad Rzeszutek Wilk.
- New ACPI suspend blacklist entry for Sony Vaio VGN-FW21M from
Fabio Valentini.
- ACPI Platform Error Interface (APEI) fix from Chen Gong.
- PCI root bridge hotplug locking fix from Yinghai Lu.
/
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Merge tag 'pm+acpi-3.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management fixes from Rafael J Wysocki:
- Fix for a recent cpufreq regression related to acpi-cpufreq and
suspend/resume from Viresh Kumar.
- cpufreq stats reference counting fix from Viresh Kumar.
- intel_pstate driver fixes from Dirk Brandewie and Konrad Rzeszutek
Wilk.
- New ACPI suspend blacklist entry for Sony Vaio VGN-FW21M from Fabio
Valentini.
- ACPI Platform Error Interface (APEI) fix from Chen Gong.
- PCI root bridge hotplug locking fix from Yinghai Lu.
* tag 'pm+acpi-3.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PCI / ACPI: hold acpi_scan_lock during root bus hotplug
ACPI / APEI: fix error status check condition for CPER
ACPI / PM: fix suspend and resume on Sony Vaio VGN-FW21M
cpufreq: acpi-cpufreq: Don't set policy->related_cpus from .init()
cpufreq: stats: do cpufreq_cpu_put() corresponding to cpufreq_cpu_get()
intel-pstate: Use #defines instead of hard-coded values.
cpufreq / intel_pstate: Fix calculation of current frequency
cpufreq / intel_pstate: Add function to check that all MSRs are valid
Pull crypto fixes from Herbert Xu:
"This removes IPsec ESN support from the talitos/caam drivers since
they were implemented incorrectly, causing interoperability problems
if ESN is used with them."
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
Revert "crypto: caam - add IPsec ESN support"
Revert "crypto: talitos - add IPsec ESN support"
* OMAP display fixes
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Merge tag 'fbdev-fixes-3.9-rc4' of git://gitorious.org/linux-omap-dss2/linux
Pull fbdev fixes from Tomi Valkeinen:
"Since Florian is still away/inactive, I volunteered to collect fbdev
fixes for 3.9 and changes for 3.10. I didn't receive any other fbdev
fixes than OMAP yet, but I didn't want to delay this further as
there's a compilation fix for OMAP1. So there could be still some
fbdev fixes on the way a bit later.
This contains:
- Fix OMAP1 compilation
- OMAP display fixes"
* tag 'fbdev-fixes-3.9-rc4' of git://gitorious.org/linux-omap-dss2/linux:
omapdss: features: fix supported outputs for OMAP4
OMAPDSS: tpo-td043 panel: fix data passing between SPI/DSS parts
omapfb: fix broken build on OMAP1
Pull userns fixes from Eric W Biederman:
"The bulk of the changes are fixing the worst consequences of the user
namespace design oversight in not considering what happens when one
namespace starts off as a clone of another namespace, as happens with
the mount namespace.
The rest of the changes are just plain bug fixes.
Many thanks to Andy Lutomirski for pointing out many of these issues."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
userns: Restrict when proc and sysfs can be mounted
ipc: Restrict mounting the mqueue filesystem
vfs: Carefully propogate mounts across user namespaces
vfs: Add a mount flag to lock read only bind mounts
userns: Don't allow creation if the user is chrooted
yama: Better permission check for ptraceme
pid: Handle the exit of a multi-threaded init.
scm: Require CAP_SYS_ADMIN over the current pidns to spoof pids.
It enhances the driver for FTDI-based USB serial adapters
to recognize Mitsubishi Electric Corp. USB/RS422 Converters
as FT232BM chips and support them.
https://search.meau.com/?q=FX-USB-AW
Signed-off-by: Konstantin Holoborodko <klh.kernel@gmail.com>
Tested-by: Konstantin Holoborodko <klh.kernel@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix to return a negative error code from the error handling
case instead of 0, as returned elsewhere in this function.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If we don't find the expected csum item, but find a csum item which is
adjacent to the specified extent, we should return -EFBIG, or we should
return -ENOENT. But btrfs_lookup_csum() return -EFBIG even the csum item
is not adjacent to the specified extent. Fix it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
We reserve the space for csums only when we write data into a file, in
the other cases, such as tree log, log replay, we don't do reservation,
so we can use the reservation of the transaction handle just for the former.
And for the latter, we should use the tree's own reservation. But the
function - btrfs_csum_file_blocks() didn't differentiate between these
two types of the cases, fix it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
The function btrfs_find_all_roots is responsible to allocate
memory for 'roots' and free it if errors happen,so the caller should not
free it again since the work has been done.
Besides,'tmp' is allocated after the function btrfs_find_all_roots,
so we can return directly if btrfs_find_all_roots() fails.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
A user reported a problem where he was getting early ENOSPC with hundreds of
gigs of free data space and 6 gigs of free metadata space. This is because the
global block reserve was taking up the entire free metadata space. This is
ridiculous, we have infrastructure in place to throttle if we start using too
much of the global reserve, so instead of letting it get this huge just limit it
to 512mb so that users can still get work done. This allowed the user to
complete his rsync without issues. Thanks
Cc: stable@vger.kernel.org
Reported-and-tested-by: Stefan Priebe <s.priebe@profihost.ag>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
We need to hold the ordered_operations mutex while waiting on ordered extents
since we splice and run the ordered extents list. We need to make sure anybody
else who wants to wait on ordered extents does actually wait for them to be
completed. This will keep us from bailing out of flushing in case somebody is
already waiting on ordered extents to complete. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
We are way over-reserving for unlink and rename. Rename is just some random
huge number and unlink accounts for tree log operations that don't actually
happen during unlink, not to mention the tree log doesn't take from the trans
block rsv anyway so it's completely useless. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Dave reported a warning when running xfstest 275. We have been leaking delalloc
metadata space when our reservations fail. This is because we were improperly
calculating how much space to free for our checksum reservations. The problem
is we would sometimes free up space that had already been freed in another
thread and we would end up with negative usage for the delalloc space. This
patch fixes the problem by calculating how much space the other threads would
have already freed, and then calculate how much space we need to free had we not
done the reservation at all, and then freeing any excess space. This makes
xfstests 275 no longer have leaked space. Thanks
Cc: stable@vger.kernel.org
Reported-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
When you take a snapshot, punch a hole where there has been data, then take
another snapshot and try to send an incremental stream, btrfs send would
give you EIO. That is because is_extent_unchanged had no support for holes
being punched. With this patch, instead of returning EIO we just return
0 (== the extent is not unchanged) and we're good.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Cc: Alexander Block <ablock84@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
* acpi-fixes:
PCI / ACPI: hold acpi_scan_lock during root bus hotplug
ACPI / APEI: fix error status check condition for CPER
ACPI / PM: fix suspend and resume on Sony Vaio VGN-FW21M
* pm-fixes:
cpufreq: acpi-cpufreq: Don't set policy->related_cpus from .init()
cpufreq: stats: do cpufreq_cpu_put() corresponding to cpufreq_cpu_get()
intel-pstate: Use #defines instead of hard-coded values.
cpufreq / intel_pstate: Fix calculation of current frequency
cpufreq / intel_pstate: Add function to check that all MSRs are valid
Submitted by me since BenH is on vacation.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sfr/next-fixes
Pull powerpc build fixes from Stephen Rothwell:
"Just a couple of build fixes for powerpc all{mod,yes}config.
Submitted by me since BenH is on vacation."
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sfr/next-fixes:
powerpc: define the conditions where the ePAPR idle hcall can be supported
powerpc: make additional room in exception vector area
- Regression fixes for C-and-P states not being parsed properly.
- Fix possible security issue with guests triggering DoS via non-assigned MSI-Xs.
- Fix regression (introduced in v3.7) with raising an event (v2).
- Fix hastily introduced band-aid during c0 for the CR3 blowup.
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Merge tag 'stable/for-linus-3.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
"This is mostly just the last stragglers of the regression bugs that
this merge window had. There are also two bug-fixes: one that adds an
extra layer of security, and a regression fix for a change that was
added in v3.7 (the v1 was faulty, the v2 works).
- Regression fixes for C-and-P states not being parsed properly.
- Fix possible security issue with guests triggering DoS via
non-assigned MSI-Xs.
- Fix regression (introduced in v3.7) with raising an event (v2).
- Fix hastily introduced band-aid during c0 for the CR3 blowup."
* tag 'stable/for-linus-3.9-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen/events: avoid race with raising an event in unmask_evtchn()
xen/mmu: Move the setting of pvops.write_cr3 to later phase in bootup.
xen/acpi-stub: Disable it b/c the acpi_processor_add is no longer called.
xen-pciback: notify hypervisor about devices intended to be assigned to guests
xen/acpi-processor: Don't dereference struct acpi_processor on all CPUs.
Pull HID fixes from Jiri Kosina:
- fix for potential 3.9 regression in handling of buttons for touchpads
following HID mt specification; potential because reportedly there is
no retail product on the market that would be using this feature, but
nevertheless we'd better follow the spec. Fix by Benjamin Tissoires.
- support for two quirky devices added by Josh Boyer.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: multitouch: fix touchpad buttons
HID: usbhid: fix build problem
HID: usbhid: quirk for MSI GX680R led panel
HID: usbhid: quirk for Realtek Multi-card reader
Here are some fixes which have collected since Linux v3.9-rc1. The most
important one fixes a long-standing regressen which make re-hotplugged
devices unusable when AMD IOMMU is used. The other patches fix build
issues (build regression on OMAP and a section mismatch). One patch just
removes a duplicate header include.
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Merge tag 'iommu-fixes-v3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"Here are some fixes which have collected since Linux v3.9-rc1.
The most important one fixes a long-standing regressen which make
re-hotplugged devices unusable when AMD IOMMU is used.
The other patches fix build issues (build regression on OMAP and a
section mismatch). One patch just removes a duplicate header include."
* tag 'iommu-fixes-v3.9-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Make sure dma_ops are set for hotplug devices
x86, io_apic: remove duplicated include from irq_remapping.c
iommu: OMAP: build only on OMAP2+
amd_iommu_init: remove __init from amd_iommu_erratum_746_workaround
Commit 06ae43f34b ("Don't bother with redoing rw_verify_area() from
default_file_splice_from()") lost the checks to test existence of the
write/aio_write methods. My apologies ;-/
Eventually, we want that in fs/splice.c side of things (no point
repeating it for every buffer, after all), but for now this is the
obvious minimal fix.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In unmask_evtchn(), when the mask bit is cleared after testing for
pending and the event becomes pending between the test and clear, then
the upcall will not become pending and the event may be lost or
delayed.
Avoid this by always clearing the mask bit before checking for
pending. If a hypercall is needed, remask the event as
EVTCHNOP_unmask will only retrigger pending events if they were
masked.
This fixes a regression introduced in 3.7 by
b5e579232d (xen/events: fix
unmask_evtchn for PV on HVM guests) which reordered the clear mask and
check pending operations.
Changes in v2:
- set mask before hypercall.
Cc: stable@vger.kernel.org
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
We move the setting of write_cr3 from the early bootup variant
(see git commit 0cc9129d75
"x86-64, xen, mmu: Provide an early version of write_cr3.")
to a more appropiate location.
This new location sets all of the other non-early variants
of pvops calls - and most importantly is before the
alternative_asm mechanism kicks in.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
With the Xen ACPI stub code (CONFIG_XEN_STUB=y) enabled, the power
C and P states are no longer uploaded to the hypervisor.
The reason is that the Xen CPU hotplug code: xen-acpi-cpuhotplug.c
and the xen-acpi-stub.c register themselves as the "processor" type object.
That means the generic processor (processor_driver.c) stops
working and it does not call (acpi_processor_add) which populates the
per_cpu(processors, pr->id) = pr;
structure. The 'pr' is gathered from the acpi_processor_get_info function
which does the job of finding the C-states and figuring out PBLK address.
The 'processors->pr' is then later used by xen-acpi-processor.c (the one that
uploads C and P states to the hypervisor). Since it is NULL, we end
skip the gathering of _PSD, _PSS, _PCT, etc and never upload the power
management data.
The end result is that enabling the CONFIG_XEN_STUB in the build means that
xen-acpi-processor is not working anymore.
This temporary patch fixes it by marking the XEN_STUB driver as
BROKEN until this can be properly fixed.
CC: jinsong.liu@intel.com
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The current lpc32xx_defconfig breaks like this, caused by recent phy
restructuring:
LD init/built-in.o
drivers/built-in.o: In function `usb_hcd_nxp_probe':
drivers/usb/host/ohci-nxp.c:224: undefined reference to `isp1301_get_client'
drivers/built-in.o: In function `lpc32xx_udc_probe':
drivers/usb/gadget/lpc32xx_udc.c:3104: undefined reference to
`isp1301_get_client' distcc[27867] ERROR: compile (null) on localhost failed
make: *** [vmlinux] Error 1
Caused by 1c2088812f (usb: Makefile: fix
drivers/usb/phy/ Makefile entry)
This patch fixes this by selecting USB_OTG_UTILS in Kconfig which
causes the phy driver to be built again.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Only allow unprivileged mounts of proc and sysfs if they are already
mounted when the user namespace is created.
proc and sysfs are interesting because they have content that is
per namespace, and so fresh mounts are needed when new namespaces
are created while at the same time proc and sysfs have content that
is shared between every instance.
Respect the policy of who may see the shared content of proc and sysfs
by only allowing new mounts if there was an existing mount at the time
the user namespace was created.
In practice there are only two interesting cases: proc and sysfs are
mounted at their usual places, proc and sysfs are not mounted at all
(some form of mount namespace jail).
Cc: stable@vger.kernel.org
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Only allow mounting the mqueue filesystem if the caller has CAP_SYS_ADMIN
rights over the ipc namespace. The principle here is if you create
or have capabilities over it you can mount it, otherwise you get to live
with what other people have mounted.
This information is not particularly sensitive and mqueue essentially
only reports which posix messages queues exist. Still when creating a
restricted environment for an application to live any extra
information may be of use to someone with sufficient creativity. The
historical if imperfect way this information has been restricted has
been not to allow mounts and restricting this to ipc namespace
creators maintains the spirit of the historical restriction.
Cc: stable@vger.kernel.org
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
As a matter of policy MNT_READONLY should not be changable if the
original mounter had more privileges than creator of the mount
namespace.
Add the flag CL_UNPRIVILEGED to note when we are copying a mount from
a mount namespace that requires more privileges to a mount namespace
that requires fewer privileges.
When the CL_UNPRIVILEGED flag is set cause clone_mnt to set MNT_NO_REMOUNT
if any of the mnt flags that should never be changed are set.
This protects both mount propagation and the initial creation of a less
privileged mount namespace.
Cc: stable@vger.kernel.org
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Reported-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
When a read-only bind mount is copied from mount namespace in a higher
privileged user namespace to a mount namespace in a lesser privileged
user namespace, it should not be possible to remove the the read-only
restriction.
Add a MNT_LOCK_READONLY mount flag to indicate that a mount must
remain read-only.
CC: stable@vger.kernel.org
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
