- Fix a potential regression in the generic power domains
framework introduced during the 4.3 development cycle that
may lead to spurious failures of system suspend in certain
situations (Ulf Hansson).
- Fix a problem in the power capping RAPL (Running Average
Power Limits) driver that causes it to initialize successfully
on some systems where it is not supposed to do that which is
due to an incorrect check in an initialization routine (Prarit
Bhargava).
- Fix a build problem in the cpufreq Tegra driver that depends
on the regulator framework, but that dependency is not reflected
in Kconfig (Arnd Bergmann).
- Fix a recent mistake in the intel_pstate driver where a numeric
constant is used directly instead of a symbol defined specifically
for the case in question (Prarit Bhargava).
/
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Merge tag 'pm+acpi-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a potential regression introduced during the 4.3 cycle
(generic power domains framework), a nasty bug that has been present
forever (power capping RAPL driver), a build issue (Tegra cpufreq
driver) and a minor ugliness introduced recently (intel_pstate).
Specifics:
- Fix a potential regression in the generic power domains framework
introduced during the 4.3 development cycle that may lead to
spurious failures of system suspend in certain situations (Ulf
Hansson).
- Fix a problem in the power capping RAPL (Running Average Power
Limits) driver that causes it to initialize successfully on some
systems where it is not supposed to do that which is due to an
incorrect check in an initialization routine (Prarit Bhargava).
- Fix a build problem in the cpufreq Tegra driver that depends on the
regulator framework, but that dependency is not reflected in
Kconfig (Arnd Bergmann).
- Fix a recent mistake in the intel_pstate driver where a numeric
constant is used directly instead of a symbol defined specifically
for the case in question (Prarit Bhargava)"
* tag 'pm+acpi-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
powercap / RAPL: fix BIOS lock check
cpufreq: intel_pstate: Minor cleanup for FRAC_BITS
cpufreq: tegra: add regulator dependency for T124
PM / Domains: Allow runtime PM callbacks to be re-used during system PM
Three fixes this time, two in SES picked up by KASAN for various types of
buffer overrun. The first is a USB array which returns page 8 whatever is
asked for and causes us to overrun with incorrect data format assumptions and
the second is an invalid iteration of page 10 (the additional information
page). The final one is a reversion of a NULL deref fix which caused
suspend/resume not to be called in pairs leading to incorrect device operation
(Jens has queued a more proper fix for the problem in block).
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Three fixes this time, two in SES picked up by KASAN for various types
of buffer overrun. The first is a USB array which returns page 8
whatever is asked for and causes us to overrun with incorrect data
format assumptions and the second is an invalid iteration of page 10
(the additional information page).
The final fix is a reversion of a NULL deref fix which caused
suspend/resume not to be called in pairs leading to incorrect device
operation (Jens has queued a more proper fix for the problem in
block)"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
ses: fix additional element traversal bug
Revert "SCSI: Fix NULL pointer dereference in runtime PM"
ses: Fix problems with simple enclosures
Just one important fix for amdgpu to avoid possible memory corruption.
* 'drm-fixes-4.4' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu: fix user fence handling
Looks like we're missing the wakeirq for the console uart for
duovero parlor. Let's add that as without it console acess just
hangs with PM enabled.
Cc: Arun Bharadwaj <arun@gumstix.com>
Cc: Ash Charles <ash@gumstix.com>
Cc: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Tony Lindgren <tony@atomide.com>
When sending "SLEEP" command to the controller it ceases scanning
completely and is unable to wake the system up from sleep, so if it is
configured as a wakeup source we should simply configure interrupt for
wakeup and rely on idle logic within the controller to reduce power
consumption while it is not used.
Signed-off-by: James Chen <james.chen@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pull btrfs fixes from Chris Mason:
"A couple of small fixes"
* 'for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: check prepare_uptodate_page() error code earlier
Btrfs: check for empty bitmap list in setup_cluster_bitmaps
btrfs: fix misleading warning when space cache failed to load
Btrfs: fix transaction handle leak in balance
Btrfs: fix unprotected list move from unused_bgs to deleted_bgs list
Merge misc fixes from Andrew Morton:
"Three patches"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
include/linux/mmdebug.h: should include linux/bug.h
mm/zswap: change incorrect strncmp use to strcmp
proc: fix -ESRCH error when writing to /proc/$pid/coredump_filter
mmdebug.h uses BUILD_BUG_ON_INVALID(), assuming someone else included
linux/bug.h. Include it ourselves.
This saves build-failures such as:
arch/arm64/include/asm/pgtable.h: In function 'set_pte_at':
arch/arm64/include/asm/pgtable.h:281:3: error: implicit declaration of function 'BUILD_BUG_ON_INVALID' [-Werror=implicit-function-declaration]
VM_WARN_ONCE(!pte_young(pte),
Fixes: 02602a18c3 ("bug: completely remove code generated by disabled VM_BUG_ON()")
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change the use of strncmp in zswap_pool_find_get() to strcmp.
The use of strncmp is no longer correct, now that zswap_zpool_type is
not an array; sizeof() will return the size of a pointer, which isn't
the right length to compare. We don't need to use strncmp anyway,
because the existing params and the passed in params are all guaranteed
to be null terminated, so strcmp should be used.
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Reported-by: Weijie Yang <weijie.yang@samsung.com>
Cc: Seth Jennings <sjennings@variantweb.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Writing to /proc/$pid/coredump_filter always returns -ESRCH because commit
774636e19e ("proc: convert to kstrto*()/kstrto*_from_user()") removed
the setting of ret after the get_proc_task call and incorrectly left it as
-ESRCH. Instead, return 0 when successful.
Example breakage:
echo 0 > /proc/self/coredump_filter
bash: echo: write error: No such process
Fixes: 774636e19e ("proc: convert to kstrto*()/kstrto*_from_user()")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org> [4.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Select CONFIG_BITREVERSE for sht15 driver to avoid build failure
if it is not configured.
- Force wait for conversion time for the first valid data in tmp102
driver to avoid reporting erroneous data to the thermal subsystem.
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Merge tag 'hwmon-for-linus-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Select CONFIG_BITREVERSE for sht15 driver to avoid build failure if
it is not configured.
- Force wait for conversion time for the first valid data in tmp102
driver to avoid reporting erroneous data to the thermal subsystem.
* tag 'hwmon-for-linus-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (sht15) Select CONFIG_BITREVERSE
hwmon: (tmp102) Force wait for conversion time for the first valid data
* Two similar fixes for the Intel and AMD IOMMU drivers to add
proper access checks before calling handle_mm_fault.
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Merge tag 'iommu-fixes-v4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"Two similar fixes for the Intel and AMD IOMMU drivers to add proper
access checks before calling handle_mm_fault"
* tag 'iommu-fixes-v4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/vt-d: Do access checks before calling handle_mm_fault()
iommu/amd: Do proper access checking before calling handle_mm_fault()
- XSA-155 security fixes to backend drivers.
- XSA-157 security fixes to pciback.
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Merge tag 'for-linus-4.4-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen bug fixes from David Vrabel:
- XSA-155 security fixes to backend drivers.
- XSA-157 security fixes to pciback.
* tag 'for-linus-4.4-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen-pciback: fix up cleanup path when alloc fails
xen/pciback: Don't allow MSI-X ops if PCI_COMMAND_MEMORY is not set.
xen/pciback: For XEN_PCI_OP_disable_msi[|x] only disable if device has MSI(X) enabled.
xen/pciback: Do not install an IRQ handler for MSI interrupts.
xen/pciback: Return error on XEN_PCI_OP_enable_msix when device has MSI or MSI-X enabled
xen/pciback: Return error on XEN_PCI_OP_enable_msi when device has MSI or MSI-X enabled
xen/pciback: Save xen_pci_op commands before processing it
xen-scsiback: safely copy requests
xen-blkback: read from indirect descriptors only once
xen-blkback: only read request operation from shared ring once
xen-netback: use RING_COPY_REQUEST() throughout
xen-netback: don't use last request to determine minimum Tx credit
xen: Add RING_COPY_REQUEST()
xen/x86/pvh: Use HVM's flush_tlb_others op
xen: Resume PMU from non-atomic context
xen/events/fifo: Consume unprocessed events when a CPU dies
As usual in rc6, this update contains only a few HD-audio and
USB-audio device-specific quirks: yet another Thinkpad noise fixes,
Dell headphone mic fixes, and AudioQuest DragonFly fixes.
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Merge tag 'sound-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"As usual in rc6, this update contains only a few HD-audio and
USB-audio device-specific quirks: yet another Thinkpad noise fixes,
Dell headphone mic fixes, and AudioQuest DragonFly fixes"
* tag 'sound-4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Add a fixup for Thinkpad X1 Carbon 2nd
ALSA: hda - Set codec to D3 at reboot/shutdown on Thinkpads
ALSA: hda - Apply click noise workaround for Thinkpads generically
ALSA: hda - Fix headphone mic input on a few Dell ALC293 machines
ALSA: usb-audio: Add sample rate inquiry quirk for AudioQuest DragonFly
ALSA: usb-audio: Add a more accurate volume quirk for AudioQuest DragonFly
A little bit of a last-minute change for the device tree "fixed partition"
binding. This is needed because we might want to reuse the 'partitions' subnode
for other sorts of partitioning descriptions -- e.g., for describing which
on-flash partition format(s) might be used on the system.
Also tone down a warning message, since it is probably going to show up on a
lot of systems where it should just be ignored.
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Merge tag 'for-linus-20151217' of git://git.infradead.org/linux-mtd
Pull MTD fixes from Brian Norris:
"I was holding out on this pull request for a bit, since there are a
few other small issues being discussed that look like 4.4-rc
regressions. Hopefully I can get those stabilized soon, but these are
ready at any rate:
- A little bit of a last-minute change for the device tree "fixed
partition" binding. This is needed because we might want to reuse
the 'partitions' subnode for other sorts of partitioning
descriptions -- e.g., for describing which on-flash partition
format(s) might be used on the system.
- Also tone down a warning message, since it is probably going to
show up on a lot of systems where it should just be ignored"
* tag 'for-linus-20151217' of git://git.infradead.org/linux-mtd:
doc: dt: mtd: partitions: add compatible property to "partitions" node
mtd: ofpart: don't complain about missing 'partitions' node too loudly
- Fix for the active interrupt detection code, affecting
the timer interrupt injection.
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Merge tag 'kvm-arm-for-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/ARM fixes for v4.4-rc6
- Fix for the active interrupt detection code, affecting
the timer interrupt injection.
Commit 8520f38099 ("USB: change hub initialization sleeps to
delayed_work") changed the hub_activate() routine to make part of it
run in a workqueue. However, the commit failed to take a reference to
the usb_hub structure or to lock the hub interface while doing so. As
a result, if a hub is plugged in and quickly unplugged before the work
routine can run, the routine will try to access memory that has been
deallocated. Or, if the hub is unplugged while the routine is
running, the memory may be deallocated while it is in active use.
This patch fixes the problem by taking a reference to the usb_hub at
the start of hub_activate() and releasing it at the end (when the work
is finished), and by locking the hub interface while the work routine
is running. It also adds a check at the start of the routine to see
if the hub has already been disconnected, in which nothing should be
done.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Alexandru Cornea <alexandru.cornea@intel.com>
Tested-by: Alexandru Cornea <alexandru.cornea@intel.com>
Fixes: 8520f38099 ("USB: change hub initialization sleeps to delayed_work")
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The code expects the loop to end with "retries" set to zero but, because
it is a post-op, it will end set to -1. I have fixed this by moving the
decrement inside the loop.
Fixes: 014aa2a3c3 ('USB: ipaq: minor ipaq_open() cleanup.')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Driver requested device firmware version string during probe using
only 24 byte long buffer. That buffer is too small for newer firmware
versions, which causes device firmware hang - device stops responding
to any commands after that. Increase buffer size to 128 which should
be enough for any current and future version strings.
Link: https://github.com/airspy/host/issues/27
Cc: <stable@vger.kernel.org> # 3.17+
Reported-by: Benjamin Vernoux <bvernoux@gmail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Used Avago MGA-81563 RF amplifier could be destroyed pretty easily
with too strong signal or transmitting to bad antenna.
Add module parameter 'enable_rf_gain_ctrl' which allows enabling
RF gain control - otherwise, default without the module parameter,
RF gain control is set to 'grabbed' state which prevents setting
value to the control.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
drivers/media/usb/hackrf/hackrf.c:1533 hackrf_probe()
error: we previously assumed 'dev' could be null (see line 1366)
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
When allocating a pciback device fails, clear the private
field. This could lead to an use-after free, however
the 'really_probe' takes care of setting
dev_set_drvdata(dev, NULL) in its failure path (which we would
exercise if the ->probe function failed), so we we
are OK. However lets be defensive as the code can change.
Going forward we should clean up the pci_set_drvdata(dev, NULL)
in the various code-base. That will be for another day.
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reported-by: Jonathan Creekmore <jonathan.creekmore@gmail.com>
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
If CONFIG_BITREVERSE is not built-in, the sht15 driver fails to link:
drivers/built-in.o: In function `sht15_crc8':
drivers/hwmon/sht15.c:195: undefined reference to `byte_rev_table'
This adds a Kconfig 'select' statement, like all other users of
bitrev.h have it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 33836ee985 ("hwmon:change sht15_reverse()")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
After several open/close sai test with ctrl+c, there will be
I/O error. The SAI can't work anymore, can't recover. There
will be no frame clock. With adding the software reset in
trigger stop, the issue can be fixed.
This is a hardware bug/errata and reset is the only option.
According to the reference manual, the software reset doesn't
reset any control register but only internal hardware logics
such as bit clock generator, status flags, and FIFO pointers.
(Our purpose is just to reset the clock generator while the
software reset is the only way to do that.)
Since slave mode doesn't use the clock generator, only apply
the reset procedure to the master mode.
For asynchronous mode, TX will not be reset when RX is still
running. In this case, i can't reproduce this issue.
Signed-off-by: Zidan Wang <zidan.wang@freescale.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
commit f598282f51 ("PCI: Fix the NIU MSI-X problem in a better way")
teaches us that dealing with MSI-X can be troublesome.
Further checks in the MSI-X architecture shows that if the
PCI_COMMAND_MEMORY bit is turned of in the PCI_COMMAND we
may not be able to access the BAR (since they are memory regions).
Since the MSI-X tables are located in there.. that can lead
to us causing PCIe errors. Inhibit us performing any
operation on the MSI-X unless the MEMORY bit is set.
Note that Xen hypervisor with:
"x86/MSI-X: access MSI-X table only after having enabled MSI-X"
will return:
xen_pciback: 0000:0a:00.1: error -6 enabling MSI-X for guest 3!
When the generic MSI code tries to setup the PIRQ without
MEMORY bit set. Which means with later versions of Xen
(4.6) this patch is not neccessary.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Otherwise just continue on, returning the same values as
previously (return of 0, and op->result has the PIRQ value).
This does not change the behavior of XEN_PCI_OP_disable_msi[|x].
The pci_disable_msi or pci_disable_msix have the checks for
msi_enabled or msix_enabled so they will error out immediately.
However the guest can still call these operations and cause
us to disable the 'ack_intr'. That means the backend IRQ handler
for the legacy interrupt will not respond to interrupts anymore.
This will lead to (if the device is causing an interrupt storm)
for the Linux generic code to disable the interrupt line.
Naturally this will only happen if the device in question
is plugged in on the motherboard on shared level interrupt GSI.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Otherwise an guest can subvert the generic MSI code to trigger
an BUG_ON condition during MSI interrupt freeing:
for (i = 0; i < entry->nvec_used; i++)
BUG_ON(irq_has_action(entry->irq + i));
Xen PCI backed installs an IRQ handler (request_irq) for
the dev->irq whenever the guest writes PCI_COMMAND_MEMORY
(or PCI_COMMAND_IO) to the PCI_COMMAND register. This is
done in case the device has legacy interrupts the GSI line
is shared by the backend devices.
To subvert the backend the guest needs to make the backend
to change the dev->irq from the GSI to the MSI interrupt line,
make the backend allocate an interrupt handler, and then command
the backend to free the MSI interrupt and hit the BUG_ON.
Since the backend only calls 'request_irq' when the guest
writes to the PCI_COMMAND register the guest needs to call
XEN_PCI_OP_enable_msi before any other operation. This will
cause the generic MSI code to setup an MSI entry and
populate dev->irq with the new PIRQ value.
Then the guest can write to PCI_COMMAND PCI_COMMAND_MEMORY
and cause the backend to setup an IRQ handler for dev->irq
(which instead of the GSI value has the MSI pirq). See
'xen_pcibk_control_isr'.
Then the guest disables the MSI: XEN_PCI_OP_disable_msi
which ends up triggering the BUG_ON condition in 'free_msi_irqs'
as there is an IRQ handler for the entry->irq (dev->irq).
Note that this cannot be done using MSI-X as the generic
code does not over-write dev->irq with the MSI-X PIRQ values.
The patch inhibits setting up the IRQ handler if MSI or
MSI-X (for symmetry reasons) code had been called successfully.
P.S.
Xen PCIBack when it sets up the device for the guest consumption
ends up writting 0 to the PCI_COMMAND (see xen_pcibk_reset_device).
XSA-120 addendum patch removed that - however when upstreaming said
addendum we found that it caused issues with qemu upstream. That
has now been fixed in qemu upstream.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The guest sequence of:
a) XEN_PCI_OP_enable_msix
b) XEN_PCI_OP_enable_msix
results in hitting an NULL pointer due to using freed pointers.
The device passed in the guest MUST have MSI-X capability.
The a) constructs and SysFS representation of MSI and MSI groups.
The b) adds a second set of them but adding in to SysFS fails (duplicate entry).
'populate_msi_sysfs' frees the newly allocated msi_irq_groups (note that
in a) pdev->msi_irq_groups is still set) and also free's ALL of the
MSI-X entries of the device (the ones allocated in step a) and b)).
The unwind code: 'free_msi_irqs' deletes all the entries and tries to
delete the pdev->msi_irq_groups (which hasn't been set to NULL).
However the pointers in the SysFS are already freed and we hit an
NULL pointer further on when 'strlen' is attempted on a freed pointer.
The patch adds a simple check in the XEN_PCI_OP_enable_msix to guard
against that. The check for msi_enabled is not stricly neccessary.
This is part of XSA-157
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The guest sequence of:
a) XEN_PCI_OP_enable_msi
b) XEN_PCI_OP_enable_msi
c) XEN_PCI_OP_disable_msi
results in hitting an BUG_ON condition in the msi.c code.
The MSI code uses an dev->msi_list to which it adds MSI entries.
Under the above conditions an BUG_ON() can be hit. The device
passed in the guest MUST have MSI capability.
The a) adds the entry to the dev->msi_list and sets msi_enabled.
The b) adds a second entry but adding in to SysFS fails (duplicate entry)
and deletes all of the entries from msi_list and returns (with msi_enabled
is still set). c) pci_disable_msi passes the msi_enabled checks and hits:
BUG_ON(list_empty(dev_to_msi_list(&dev->dev)));
and blows up.
The patch adds a simple check in the XEN_PCI_OP_enable_msi to guard
against that. The check for msix_enabled is not stricly neccessary.
This is part of XSA-157.
CC: stable@vger.kernel.org
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Double fetch vulnerabilities that happen when a variable is
fetched twice from shared memory but a security check is only
performed the first time.
The xen_pcibk_do_op function performs a switch statements on the op->cmd
value which is stored in shared memory. Interestingly this can result
in a double fetch vulnerability depending on the performed compiler
optimization.
This patch fixes it by saving the xen_pci_op command before
processing it. We also use 'barrier' to make sure that the
compiler does not perform any optimization.
This is part of XSA155.
CC: stable@vger.kernel.org
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The copy of the ring request was lacking a following barrier(),
potentially allowing the compiler to optimize the copy away.
Use RING_COPY_REQUEST() to ensure the request is copied to local
memory.
This is part of XSA155.
CC: stable@vger.kernel.org
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Since indirect descriptors are in memory shared with the frontend, the
frontend could alter the first_sect and last_sect values after they have
been validated but before they are recorded in the request. This may
result in I/O requests that overflow the foreign page, possibly
overwriting local pages when the I/O request is executed.
When parsing indirect descriptors, only read first_sect and last_sect
once.
This is part of XSA155.
CC: stable@vger.kernel.org
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
A compiler may load a switch statement value multiple times, which could
be bad when the value is in memory shared with the frontend.
When converting a non-native request to a native one, ensure that
src->operation is only loaded once by using READ_ONCE().
This is part of XSA155.
CC: stable@vger.kernel.org
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Instead of open-coding memcpy()s and directly accessing Tx and Rx
requests, use the new RING_COPY_REQUEST() that ensures the local copy
is correct.
This is more than is strictly necessary for guest Rx requests since
only the id and gref fields are used and it is harmless if the
frontend modifies these.
This is part of XSA155.
CC: stable@vger.kernel.org
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The last from guest transmitted request gives no indication about the
minimum amount of credit that the guest might need to send a packet
since the last packet might have been a small one.
Instead allow for the worst case 128 KiB packet.
This is part of XSA155.
CC: stable@vger.kernel.org
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Using RING_GET_REQUEST() on a shared ring is easy to use incorrectly
(i.e., by not considering that the other end may alter the data in the
shared ring while it is being inspected). Safe usage of a request
generally requires taking a local copy.
Provide a RING_COPY_REQUEST() macro to use instead of
RING_GET_REQUEST() and an open-coded memcpy(). This takes care of
ensuring that the copy is done correctly regardless of any possible
compiler optimizations.
Use a volatile source to prevent the compiler from reordering or
omitting the copy.
This is part of XSA155.
CC: stable@vger.kernel.org
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The print_insn() function returns strings like "lghi %r1,0". To escape the
'%' character in sprintf() a second '%' is used. For example "lghi %%r1,0"
is converted into "lghi %r1,0".
After print_insn() the output string is passed to printk(). Because format
specifiers like "%r" or "%f" are ignored by printk() this works by chance
most of the time. But for instructions with control registers like
"lctl %c6,%c6,780" this fails because printk() interprets "%c" as
character format specifier.
Fix this problem and escape the '%' characters twice.
For example "lctl %%%%c6,%%%%c6,780" is then converted by sprintf()
into "lctl %%c6,%%c6,780" and by printk() into "lctl %c6,%c6,780".
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Commit 25642e1459 ("powerpc/opal-irqchip: Fix double endian
conversion") fixed an endian bug by calling opal_handle_events() in
opal_event_unmask().
However this introduced a deadlock if we find an event is active
during unmasking and call opal_handle_events() again. The bad call
sequence is:
opal_interrupt()
-> opal_handle_events()
-> generic_handle_irq()
-> handle_level_irq()
-> raw_spin_lock(&desc->lock)
handle_irq_event(desc)
unmask_irq(desc)
-> opal_event_unmask()
-> opal_handle_events()
-> generic_handle_irq()
-> handle_level_irq()
-> raw_spin_lock(&desc->lock) (BOOM)
When generating multiple opal events in quick succession this would lead
to the following stall warnings:
EEH: Fenced PHB#0 detected, location: U78C9.001.WZS09XA-P1-C32
INFO: rcu_sched detected stalls on CPUs/tasks:
12-...: (1 GPs behind) idle=68f/140000000000001/0 softirq=860/861 fqs=2065
15-...: (1 GPs behind) idle=be5/140000000000001/0 softirq=1142/1143 fqs=2065
(detected by 13, t=2102 jiffies, g=1325, c=1324, q=602)
NMI watchdog: BUG: soft lockup - CPU#18 stuck for 22s! [irqbalance:2696]
INFO: rcu_sched detected stalls on CPUs/tasks:
12-...: (1 GPs behind) idle=68f/140000000000001/0 softirq=860/861 fqs=8371
15-...: (1 GPs behind) idle=be5/140000000000001/0 softirq=1142/1143 fqs=8371
(detected by 20, t=8407 jiffies, g=1325, c=1324, q=1290)
This patch corrects the problem by queuing the work if an event is
active during unmasking, which is similar to the pre-endian fix
behaviour.
Fixes: 25642e1459 ("powerpc/opal-irqchip: Fix double endian conversion")
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Reported-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
It takes three minutes to enter into hibernation on some OEM SKL
machines and we see many codec spurious response after thaw() opertion.
This is because HDA is still in D0 state after freeze() call and
pci_pm_freeze/pci_pm_freeze_noirq() don't set D3 hot in pci_bus driver.
It seems bios still access HDA when system enter into freeze state,
HDA will receive codec response interrupt immediately after thaw() call.
Because of this unexpected interrupt, HDA enter into a abnormal
state and slow down the system enter into hibernation.
In this patch, we put HDA into D3 hot state in azx_freeze_noirq() and
put HDA into D0 state in azx_thaw_noirq().
V2: Only apply this fix to SKL+
Fix compile error when CONFIG_PM_SLEEP isn't defined
[Yet another fix for CONFIG_PM_SLEEP ifdef and the additional comment
by tiwai]
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Commit 2910ff17d1
introduced a regression which would remove a recently added spare via
slot_store. Revert part of the patch which touches slot_store() and add
the disk directly using pers->hot_add_disk()
Fixes: 2910ff17d1 ("md: remove_and_add_spares() to activate specific
rdev")
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Pawel Baldysiak <pawel.baldysiak@intel.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Neil pointed out setting journal disk role to raid_disks will confuse
reshape if we support reshape eventually. Switching the role to 0 (we
should be fine as long as the value >=0) and skip sysfs file creation to
avoid error.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This is an oversight that made use of the trip-point-based fan managenent on
cards that never expose those. This led the fan to stay at fan_min.
Fortunately, the emergency code would kick when the temperature would reach
90°C.
Reported-by: Tom Englund <tomenglund26@gmail.com>
Tested-by: Tom Englund <tomenglund26@gmail.com>
Signed-off-by: Martin Peres <martin.peres@free.fr>
Tested-by: Daemon32 <lnf.purple@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92126
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
Pull networking fixes from David Miller:
1) Fix uninitialized variable warnings in nfnetlink_queue, a lot of
people reported this... From Arnd Bergmann.
2) Don't init mutex twice in i40e driver, from Jesse Brandeburg.
3) Fix spurious EBUSY in rhashtable, from Herbert Xu.
4) Missing DMA unmaps in mvpp2 driver, from Marcin Wojtas.
5) Fix race with work structure access in pppoe driver causing
corruptions, from Guillaume Nault.
6) Fix OOPS due to sh_eth_rx() not checking whether netdev_alloc_skb()
actually succeeded or not, from Sergei Shtylyov.
7) Don't lose flags when settifn IFA_F_OPTIMISTIC in ipv6 code, from
Bjørn Mork.
8) VXLAN_HD_RCO defined incorrectly, fix from Jiri Benc.
9) Fix clock source used for cookies in SCTP, from Marcelo Ricardo
Leitner.
10) aurora driver needs HAS_DMA dependency, from Geert Uytterhoeven.
11) ndo_fill_metadata_dst op of vxlan has to handle ipv6 tunneling
properly as well, from Jiri Benc.
12) Handle request sockets properly in xfrm layer, from Eric Dumazet.
13) Double stats update in ipv6 geneve transmit path, fix from Pravin B
Shelar.
14) sk->sk_policy[] needs RCU protection, and as a result
xfrm_policy_destroy() needs to free policies using an RCU grace
period, from Eric Dumazet.
15) SCTP needs to clone ipv6 tx options in order to avoid use after
free, from Eric Dumazet.
16) Missing kbuild export if ila.h, from Stephen Hemminger.
17) Missing mdiobus_alloc() return value checking in mdio-mux.c, from
Tobias Klauser.
18) Validate protocol value range in ->create() methods, from Hannes
Frederic Sowa.
19) Fix early socket demux races that result in illegal dst reuse, from
Eric Dumazet.
20) Validate socket address length in pptp code, from WANG Cong.
21) skb_reorder_vlan_header() uses incorrect offset and can corrupt
packets, from Vlad Yasevich.
22) Fix memory leaks in nl80211 registry code, from Ola Olsson.
23) Timeout loop count handing fixes in mISDN, xgbe, qlge, sfc, and
qlcnic. From Dan Carpenter.
24) msg.msg_iocb needs to be cleared in recvfrom() otherwise, for
example, AF_ALG will interpret it as an async call. From Tadeusz
Struk.
25) inetpeer_set_addr_v4 forgets to initialize the 'vif' field, from
Eric Dumazet.
26) rhashtable enforces the minimum table size not early enough,
breaking how we calculate the per-cpu lock allocations. From
Herbert Xu.
27) Fix FCC port lockup in 82xx driver, from Martin Roth.
28) FOU sockets need to be freed using RCU, from Hannes Frederic Sowa.
29) Fix out-of-bounds access in __skb_complete_tx_timestamp() and
sock_setsockopt() wrt. timestamp handling. From WANG Cong.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (117 commits)
net: check both type and procotol for tcp sockets
drivers: net: xgene: fix Tx flow control
tcp: restore fastopen with no data in SYN packet
af_unix: Revert 'lock_interruptible' in stream receive code
fou: clean up socket with kfree_rcu
82xx: FCC: Fixing a bug causing to FCC port lock-up
gianfar: Don't enable RX Filer if not supported
net: fix warnings in 'make htmldocs' by moving macro definition out of field declaration
rhashtable: Fix walker list corruption
rhashtable: Enforce minimum size on initial hash table
inet: tcp: fix inetpeer_set_addr_v4()
ipv6: automatically enable stable privacy mode if stable_secret set
net: fix uninitialized variable issue
bluetooth: Validate socket address length in sco_sock_bind().
net_sched: make qdisc_tree_decrease_qlen() work for non mq
ser_gigaset: remove unnecessary kfree() calls from release method
ser_gigaset: fix deallocation of platform device structure
ser_gigaset: turn nonsense checks into WARN_ON
ser_gigaset: fix up NULL checks
qlcnic: fix a timeout loop
...
