platform/kernel/linux-exynos.git
8 years agotpm: drop 'locality' from struct tpm_vendor_specific
Christophe Ricard [Thu, 31 Mar 2016 20:56:58 +0000 (22:56 +0200)]
tpm: drop 'locality' from struct tpm_vendor_specific

Dropped the field 'locality' from struct tpm_vendor_specific migrated it to
the private structures of st33zp24, tpm_i2c_infineon and tpm_tis.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: drop 'read_queue' from struct tpm_vendor_specific
Christophe Ricard [Thu, 31 Mar 2016 20:56:57 +0000 (22:56 +0200)]
tpm: drop 'read_queue' from struct tpm_vendor_specific

Dropped the field 'read_queue' from struct tpm_vendor_specific and make it
available to the various private structures in the drivers.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: drop 'irq' from struct tpm_vendor_specific
Christophe Ricard [Thu, 31 Mar 2016 20:56:56 +0000 (22:56 +0200)]
tpm: drop 'irq' from struct tpm_vendor_specific

Dropped the field 'irq' from struct tpm_vendor_specific and make it
available to the various private structures in the drivers using irqs.

A dedicated flag TPM_CHIP_FLAG_IRQ is added for the upper layers.

In st33zp24, struct st33zp24_dev declaration is moved to st33zp24.h in
order to make accessible irq from other phy's(i2c, spi).

In tpm_i2c_nuvoton, chip->vendor.priv is not directly allocated. We can
access irq field from priv_data in a cleaner way.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: drop 'iobase' from struct tpm_vendor_specific
Christophe Ricard [Thu, 31 Mar 2016 20:56:55 +0000 (22:56 +0200)]
tpm: drop 'iobase' from struct tpm_vendor_specific

Dropped the field 'iobase' from struct tpm_vendor_specific and migrated
it to the private structures of tpm_atmel and tpm_tis.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: drop list from struct tpm_vendor_specific
Christophe Ricard [Wed, 23 Mar 2016 20:17:17 +0000 (21:17 +0100)]
tpm: drop list from struct tpm_vendor_specific

Dropped list from struct tpm_vendor_specific as it is not used in any
place.

It is initialized in tpm_i2c_infineon but not used at all in the code.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: drop the field 'time_expired' from struct tpm_chip
Jarkko Sakkinen [Wed, 23 Mar 2016 06:23:39 +0000 (08:23 +0200)]
tpm: drop the field 'time_expired' from struct tpm_chip

Removed the field because it is not used for anything.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm: drop 'base' from struct tpm_vendor_specific
Jarkko Sakkinen [Wed, 23 Mar 2016 06:16:09 +0000 (08:16 +0200)]
tpm: drop 'base' from struct tpm_vendor_specific

Dropped the field 'base' from struct tpm_vendor_specific and migrated
it to the private structures of tpm_atmel and tpm_nsc.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm: drop manufacturer_id from struct tpm_vendor_specific
Jarkko Sakkinen [Wed, 23 Mar 2016 05:31:56 +0000 (07:31 +0200)]
tpm: drop manufacturer_id from struct tpm_vendor_specific

Dropped manufacturer_id from struct tpm_vendor_specific and redeclared
it in the private struct priv_data that tpm_tis uses because the field
is only used tpm_tis.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm: drop tpm_atmel specific fields from tpm_vendor_specific
Jarkko Sakkinen [Wed, 23 Mar 2016 05:10:22 +0000 (07:10 +0200)]
tpm: drop tpm_atmel specific fields from tpm_vendor_specific

Introduced a private struct tpm_atmel_priv that contains the variables
have_region and region_size that were previously located in struct
tpm_vendor_specific. These fields were only used by tpm_atmel.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm: drop int_queue from tpm_vendor_specific
Jarkko Sakkinen [Tue, 22 Mar 2016 04:20:09 +0000 (06:20 +0200)]
tpm: drop int_queue from tpm_vendor_specific

Drop field int_queue from tpm_vendor_specific as it is used only by
tpm_tis. Probably all of the fields should be eventually dropped and
moved to the private structures of different drivers but it is better to
do this one step at a time in order not to break anything.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm: check for TPM_CHIP_FLAG_TPM2 before calling tpm2_shutdown()
Jarkko Sakkinen [Mon, 25 Apr 2016 09:20:07 +0000 (12:20 +0300)]
tpm: check for TPM_CHIP_FLAG_TPM2 before calling tpm2_shutdown()

Fixes: 20e0152393b41 ("tpm: fix crash in tpm_tis deinitialization")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reported-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm_crb: fix mapping of the buffers
Jarkko Sakkinen [Tue, 19 Apr 2016 09:54:18 +0000 (12:54 +0300)]
tpm_crb: fix mapping of the buffers

On my Lenovo x250 the following situation occurs:

[18697.813871] tpm_crb MSFT0101:00: can't request region for resource
[mem 0xacdff080-0xacdfffff]

The mapping of the control area overlaps the mapping of the command
buffer. The control area is mapped over page, which is not right. It
should mapped over sizeof(struct crb_control_area).

Fixing this issue unmasks another issue. Command and response buffers
can overlap and they do interleave on this machine. According to the PTP
specification the overlapping means that they are mapped to the same
buffer.

The commit has been also on a Haswell NUC where things worked before
applying this fix so that the both code paths for response buffer
initialization are tested.

Cc: stable@vger.kernel.org
Fixes: 1bd047be37d9 ("tpm_crb: Use devm_ioremap_resource")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm/st33zp24: Remove unneeded tpm_reg in get_burstcount
Christophe Ricard [Wed, 23 Mar 2016 07:55:34 +0000 (08:55 +0100)]
tpm/st33zp24: Remove unneeded tpm_reg in get_burstcount

We can get rid of tpm_reg variable in get_burstcount.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Drop two useless checks in ACPI probe path
Christophe Ricard [Wed, 23 Mar 2016 07:55:33 +0000 (08:55 +0100)]
tpm/st33zp24/spi: Drop two useless checks in ACPI probe path

When st33zp24_spi_acpi_request_resources() gets called we
already know that the entries in ->acpi_match_table have matched ACPI ID
of the device.
In addition spi_device pointer cannot be NULL in any case (otherwise I2C
core would not call ->probe() for the driver in the first place).

Drop the two useless checks from the driver.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/i2c: Drop two useless checks in ACPI probe path
Christophe Ricard [Wed, 23 Mar 2016 07:55:32 +0000 (08:55 +0100)]
tpm/st33zp24/i2c: Drop two useless checks in ACPI probe path

When st33zp24_i2c_acpi_request_resources() gets called we
already know that the entries in ->acpi_match_table have matched ACPI ID
of the device.
In addition I2C client pointer cannot be NULL in any case (otherwise I2C
core would not call ->probe() for the driver in the first place).

Drop the two useless checks from the driver.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm_crb: drop struct resource res from struct crb_priv
Jarkko Sakkinen [Tue, 15 Mar 2016 19:41:40 +0000 (21:41 +0200)]
tpm_crb: drop struct resource res from struct crb_priv

The iomem resource is needed only temporarily so it is better to pass
it on instead of storing it permanently. Named the variable as io_res
so that the code better documents itself.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
8 years agotpm: fix crash in tpm_tis deinitialization
Jarkko Sakkinen [Mon, 11 Apr 2016 11:20:57 +0000 (14:20 +0300)]
tpm: fix crash in tpm_tis deinitialization

rmmod crashes the driver because tpm_chip_unregister() already sets ops
to NULL. This commit fixes the issue by moving tpm2_shutdown() to
tpm_chip_unregister(). This commit is also cleanup because it removes
duplicate code from tpm_crb and tpm_tis to the core.

Fixes: 4d3eac5e156a ("tpm: Provide strong locking for device removal")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
8 years agotpm: cleanup tpm_tis_remove()
Jarkko Sakkinen [Thu, 31 Mar 2016 10:05:36 +0000 (13:05 +0300)]
tpm: cleanup tpm_tis_remove()

Created a local variable pointing to the INT_ENABLE_x register. The
expression clearing INT_ENABLE_x.globalIntEnable is unreadable and
hard to modify without surpassing the 80 char boundary.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Christophe Ricard <christophe-h.ricard@st.com>
8 years agotpm: fix tpm_bios_log_setup stub prototype
Arnd Bergmann [Wed, 16 Mar 2016 08:19:48 +0000 (09:19 +0100)]
tpm: fix tpm_bios_log_setup stub prototype

A cleanup patch changed the prototype of the regular tpm_bios_log_setup
function, but not that of the stub that is used when the TPM is disabled,
causing a harmless build warning:

drivers/char/tpm/tpm-chip.c: In function 'tpm1_chip_register':
drivers/char/tpm/tpm-chip.c:287:38: error: passing argument 1 of 'tpm_bios_log_setup' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
  chip->bios_dir = tpm_bios_log_setup(dev_name(&chip->dev));
In file included from ../drivers/char/tpm/tpm-chip.c:30:0:
../drivers/char/tpm/tpm_eventlog.h:83:31: note: expected 'char *' but argument is of type 'const char *'
 static inline struct dentry **tpm_bios_log_setup(char *name)

This changes the stub function to match the normal prototype,
avoiding that warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: aca8db8088c3 ("tpm: Get rid of devname")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: Replace device number bitmap with IDR
Stefan Berger [Mon, 29 Feb 2016 13:53:02 +0000 (08:53 -0500)]
tpm: Replace device number bitmap with IDR

Replace the device number bitmap with IDR. Extend the number of devices we
can create to 64k.
Since an IDR allows us to associate a pointer with an ID, we use this now
to rewrite tpm_chip_find_get() to simply look up the chip pointer by the
given device ID.

Protect the IDR calls with a mutex.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: Split out the devm stuff from tpmm_chip_alloc
Jason Gunthorpe [Thu, 11 Feb 2016 19:45:48 +0000 (12:45 -0700)]
tpm: Split out the devm stuff from tpmm_chip_alloc

tpm_chip_alloc becomes a typical subsystem allocate call.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: Get rid of module locking
Stefan Berger [Mon, 29 Feb 2016 13:53:01 +0000 (08:53 -0500)]
tpm: Get rid of module locking

Now that the tpm core has strong locking around 'ops' it is possible
to remove a TPM driver, module and all, even while user space still
has things like /dev/tpmX open. For consistency and simplicity, drop
the module locking entirely.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: Provide strong locking for device removal
Jason Gunthorpe [Sat, 13 Feb 2016 03:29:53 +0000 (20:29 -0700)]
tpm: Provide strong locking for device removal

Add a read/write semaphore around the ops function pointers so
ops can be set to null when the driver un-registers.

Previously the tpm core expected module locking to be enough to
ensure that tpm_unregister could not be called during certain times,
however that hasn't been sufficient for a long time.

Introduce a read/write semaphore around 'ops' so the core can set
it to null when unregistering. This provides a strong fence around
the driver callbacks, guaranteeing to the driver that no callbacks
are running or will run again.

For now the ops_lock is placed very high in the call stack, it could
be pushed down and made more granular in future if necessary.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: Get rid of devname
Jason Gunthorpe [Mon, 29 Feb 2016 17:29:48 +0000 (12:29 -0500)]
tpm: Get rid of devname

Now that we have a proper struct device just use dev_name() to
access this value instead of keeping two copies.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: Get rid of chip->pdev
Jason Gunthorpe [Mon, 29 Feb 2016 17:29:47 +0000 (12:29 -0500)]
tpm: Get rid of chip->pdev

This is a hold over from before the struct device conversion.

- All prints should be using &chip->dev, which is the Linux
  standard. This changes prints to use tpm0 as the device name,
  not the PnP/etc ID.
- The few places involving sysfs/modules that really do need the
  parent just use chip->dev.parent instead
- We no longer need to get_device(pdev) in any places since it is no
  longer used by any of the code. The kref on the parent is held
  by the device core during device_add and dropped in device_del

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Change xxx_request_resources header
Christophe RICARD [Tue, 23 Feb 2016 21:25:51 +0000 (22:25 +0100)]
tpm/st33zp24/spi: Change xxx_request_resources header

Simplify st33zp24_spi_acpi_request_resources, st33zp24_spi_of_request_resources
and st33zp24_spi_request_resources to have the same prototype and using
spi_get_drvdata.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/i2c: Change xxx_request_resources header
Christophe RICARD [Tue, 23 Feb 2016 21:25:50 +0000 (22:25 +0100)]
tpm/st33zp24/i2c: Change xxx_request_resources header

Simplify st33zp24_i2c_acpi_request_resources, st33zp24_i2c_of_request_resources
and st33zp24_i2c_request_resources to have the same prototype and using
i2c_get_clientdata.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: st33zp24: Add support for acpi probing for spi device.
Christophe RICARD [Tue, 23 Feb 2016 21:25:49 +0000 (22:25 +0100)]
tpm: st33zp24: Add support for acpi probing for spi device.

Add support for acpi probing. SMO3324 is used for st33zp24.
It has been tested with the following acpi node on Minnowboard:

Device (TPM1)
{
Name (_ADR, Zero)  // _ADR: Address
Name (_HID, "SMO3324")  // _HID: Hardware ID
Name (_CID, "SMO3324")  // _CID: Compatible ID
Name (_DDN, "SMO TPM")  // _DDN: DOS Device Name
Name (_UID, One)  // _UID: Unique ID
Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
{
Name (SBUF, ResourceTemplate ()
{
SpiSerialBus (0, PolarityLow, FourWireMode, 8,
      ControllerInitiated, 4000000, ClockPolarityLow,
      ClockPhaseFirst, "\\_SB.SPI1",
      0x00, ResourceConsumer, ,)
GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
 "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{       // Pin list
0x0001
}
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{       // Pin list
0x0002,
}
})
Return (SBUF) /* \_SB_.SPI1.TPM1._CRS.SBUF */
}
Method (_STA, 0, NotSerialized)  // _STA: Status
{
Return (0x0F)
}
}

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24: Add support for acpi probing for i2c device.
Christophe RICARD [Sat, 13 Feb 2016 15:15:32 +0000 (16:15 +0100)]
tpm/st33zp24: Add support for acpi probing for i2c device.

Add support for acpi probing. SMO3324 is used for st33zp24.
It has been tested with the following acpi node on Minnowboard:

Device (TPM1)
{
Name (_ADR, Zero)  // _ADR: Address
Name (_HID, "SMO3324")  // _HID: Hardware ID
Name (_CID, "SMO3324")  // _CID: Compatible ID
Name (_DDN, "SMO TPM")  // _DDN: DOS Device Name
Name (_UID, One)  // _UID: Unique ID
Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
{
Name (SBUF, ResourceTemplate ()
{
I2cSerialBus (0x0013, ControllerInitiated, 400000,
      AddressingMode7Bit, "\\_SB.I2C7",
      0x00, ResourceConsumer, ,)
GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
 "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{    // Pin list
0x0001
}
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{ // Pin list
0x0002,
}
})
Return (SBUF) /* \_SB_.I2C7.TPM1._CRS.SBUF */
}

Method (_STA, 0, NotSerialized)  // _STA: Status
{
Return (0x0F)
}
}

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24: Extend Copyright headers
Christophe RICARD [Sat, 13 Feb 2016 15:15:31 +0000 (16:15 +0100)]
tpm/st33zp24: Extend Copyright headers

Extend copyright header to 2016

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Improve st33zp24_spi_evaluate_latency
Christophe RICARD [Sat, 13 Feb 2016 15:15:30 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Improve st33zp24_spi_evaluate_latency

Add check in st33zp24_spi_evaluate_latency helping to diagnose if the chip
is present or in a bad state.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24: Remove unneeded CONFIG_OF switches
Christophe RICARD [Sat, 13 Feb 2016 15:15:28 +0000 (16:15 +0100)]
tpm/st33zp24: Remove unneeded CONFIG_OF switches

DT headers already define NOOP routines when CONFIG_OF is not defined.

[jarkko.sakkinen@linux.intel.com: I tested that the driver compiles
 without warnings and errors with and without CONFIG_OF flag.]

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Remove field spi_xfer from st33zp24_spi_phy structure
Christophe RICARD [Sat, 13 Feb 2016 15:15:27 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Remove field spi_xfer from st33zp24_spi_phy structure

Remove spi_xfer from st33zp24_spi_phy structure and declare local spi_xfer
when needed instead.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Remove useless use of memcpy.
Christophe RICARD [Sat, 13 Feb 2016 15:15:26 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Remove useless use of memcpy.

An affectation is enough when copying 1 byte. Remove memcpy usage where
possible.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Use functions name with st33zp24_spi_ prefix
Christophe RICARD [Sat, 13 Feb 2016 15:15:25 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Use functions name with st33zp24_spi_ prefix

Make sure every function name use st33zp24_spi_ prefix.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Remove nbr_dummy_bytes variable usage
Christophe RICARD [Sat, 13 Feb 2016 15:15:24 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Remove nbr_dummy_bytes variable usage

nbr_dummy_bytes variable could be easily replaced by phy->latency in
st33zp24_spi_send and st33zp24_spi_recv.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Change xxx_request_resources header
Christophe RICARD [Tue, 23 Feb 2016 21:25:51 +0000 (22:25 +0100)]
tpm/st33zp24/spi: Change xxx_request_resources header

Simplify st33zp24_spi_acpi_request_resources, st33zp24_spi_of_request_resources
and st33zp24_spi_request_resources to have the same prototype and using
spi_get_drvdata.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/i2c: Change xxx_request_resources header
Christophe RICARD [Tue, 23 Feb 2016 21:25:50 +0000 (22:25 +0100)]
tpm/st33zp24/i2c: Change xxx_request_resources header

Simplify st33zp24_i2c_acpi_request_resources, st33zp24_i2c_of_request_resources
and st33zp24_i2c_request_resources to have the same prototype and using
i2c_get_clientdata.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm: st33zp24: Add support for acpi probing for spi device.
Christophe RICARD [Tue, 23 Feb 2016 21:25:49 +0000 (22:25 +0100)]
tpm: st33zp24: Add support for acpi probing for spi device.

Add support for acpi probing. SMO3324 is used for st33zp24.
It has been tested with the following acpi node on Minnowboard:

Device (TPM1)
{
Name (_ADR, Zero)  // _ADR: Address
Name (_HID, "SMO3324")  // _HID: Hardware ID
Name (_CID, "SMO3324")  // _CID: Compatible ID
Name (_DDN, "SMO TPM")  // _DDN: DOS Device Name
Name (_UID, One)  // _UID: Unique ID
Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
{
Name (SBUF, ResourceTemplate ()
{
SpiSerialBus (0, PolarityLow, FourWireMode, 8,
      ControllerInitiated, 4000000, ClockPolarityLow,
      ClockPhaseFirst, "\\_SB.SPI1",
      0x00, ResourceConsumer, ,)
GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
 "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{       // Pin list
0x0001
}
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{       // Pin list
0x0002,
}
})
Return (SBUF) /* \_SB_.SPI1.TPM1._CRS.SBUF */
}
Method (_STA, 0, NotSerialized)  // _STA: Status
{
Return (0x0F)
}
}

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24: Add support for acpi probing for i2c device.
Christophe RICARD [Sat, 13 Feb 2016 15:15:32 +0000 (16:15 +0100)]
tpm/st33zp24: Add support for acpi probing for i2c device.

Add support for acpi probing. SMO3324 is used for st33zp24.
It has been tested with the following acpi node on Minnowboard:

Device (TPM1)
{
Name (_ADR, Zero)  // _ADR: Address
Name (_HID, "SMO3324")  // _HID: Hardware ID
Name (_CID, "SMO3324")  // _CID: Compatible ID
Name (_DDN, "SMO TPM")  // _DDN: DOS Device Name
Name (_UID, One)  // _UID: Unique ID
Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
{
Name (SBUF, ResourceTemplate ()
{
I2cSerialBus (0x0013, ControllerInitiated, 400000,
      AddressingMode7Bit, "\\_SB.I2C7",
      0x00, ResourceConsumer, ,)
GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
 "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{    // Pin list
0x0001
}
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
"\\_SB.GPO2", 0x00, ResourceConsumer, ,)
{ // Pin list
0x0002,
}
})
Return (SBUF) /* \_SB_.I2C7.TPM1._CRS.SBUF */
}

Method (_STA, 0, NotSerialized)  // _STA: Status
{
Return (0x0F)
}
}

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24: Extend Copyright headers
Christophe RICARD [Sat, 13 Feb 2016 15:15:31 +0000 (16:15 +0100)]
tpm/st33zp24: Extend Copyright headers

Extend copyright header to 2016

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Improve st33zp24_spi_evaluate_latency
Christophe RICARD [Sat, 13 Feb 2016 15:15:30 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Improve st33zp24_spi_evaluate_latency

Add check in st33zp24_spi_evaluate_latency helping to diagnose if the chip
is present or in a bad state.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24: Auto-select core module
Christophe RICARD [Sat, 13 Feb 2016 15:15:29 +0000 (16:15 +0100)]
tpm/st33zp24: Auto-select core module

The core st33zp24 module is useless without either the I2C or the
SPI access module. So hide NFC_ST_NCI and select it automatically
if either TCG_TIS_ST33ZP24_I2C or TCG_TIS_ST33ZP24_SPI is selected.

This avoids presenting TCG_TIS_ST33ZP24 when neither TCG_TIS_ST33ZP24_I2C
nor TCG_TIS_ST33ZP24_SPI can be selected.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24: Remove unneeded CONFIG_OF switches
Christophe RICARD [Sat, 13 Feb 2016 15:15:28 +0000 (16:15 +0100)]
tpm/st33zp24: Remove unneeded CONFIG_OF switches

DT headers already define NOOP routines when CONFIG_OF is not defined.

[jarkko.sakkinen@linux.intel.com: I tested that the driver compiles
 without warnings and errors with and without CONFIG_OF flag.]

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Remove field spi_xfer from st33zp24_spi_phy structure
Christophe RICARD [Sat, 13 Feb 2016 15:15:27 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Remove field spi_xfer from st33zp24_spi_phy structure

Remove spi_xfer from st33zp24_spi_phy structure and declare local spi_xfer
when needed instead.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Remove useless use of memcpy.
Christophe RICARD [Sat, 13 Feb 2016 15:15:26 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Remove useless use of memcpy.

An affectation is enough when copying 1 byte. Remove memcpy usage where
possible.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Use functions name with st33zp24_spi_ prefix
Christophe RICARD [Sat, 13 Feb 2016 15:15:25 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Use functions name with st33zp24_spi_ prefix

Make sure every function name use st33zp24_spi_ prefix.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agotpm/st33zp24/spi: Remove nbr_dummy_bytes variable usage
Christophe RICARD [Sat, 13 Feb 2016 15:15:24 +0000 (16:15 +0100)]
tpm/st33zp24/spi: Remove nbr_dummy_bytes variable usage

nbr_dummy_bytes variable could be easily replaced by phy->latency in
st33zp24_spi_send and st33zp24_spi_recv.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
8 years agoum/ptrace: run seccomp after ptrace
Kees Cook [Fri, 3 Jun 2016 02:59:42 +0000 (19:59 -0700)]
um/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
8 years agotile/ptrace: run seccomp after ptrace
Kees Cook [Fri, 3 Jun 2016 02:56:43 +0000 (19:56 -0700)]
tile/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
8 years agopowerpc/ptrace: run seccomp after ptrace
Kees Cook [Fri, 3 Jun 2016 02:55:09 +0000 (19:55 -0700)]
powerpc/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
8 years agos390/ptrace: run seccomp after ptrace
Kees Cook [Thu, 2 Jun 2016 20:19:36 +0000 (13:19 -0700)]
s390/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: linux-s390@vger.kernel.org
8 years agoparisc/ptrace: run seccomp after ptrace
Kees Cook [Thu, 2 Jun 2016 20:15:52 +0000 (13:15 -0700)]
parisc/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
8 years agoMIPS/ptrace: run seccomp after ptrace
Kees Cook [Thu, 2 Jun 2016 19:33:44 +0000 (12:33 -0700)]
MIPS/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: "Maciej W. Rozycki" <macro@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
8 years agoarm64/ptrace: run seccomp after ptrace
Kees Cook [Thu, 2 Jun 2016 19:28:52 +0000 (12:28 -0700)]
arm64/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
8 years agoarm/ptrace: run seccomp after ptrace
Kees Cook [Thu, 2 Jun 2016 19:16:31 +0000 (12:16 -0700)]
arm/ptrace: run seccomp after ptrace

Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
8 years agox86/ptrace: run seccomp after ptrace
Kees Cook [Thu, 9 Jun 2016 19:36:50 +0000 (12:36 -0700)]
x86/ptrace: run seccomp after ptrace

This moves seccomp after ptrace on x86 to that seccomp can catch changes
made by ptrace. Emulation should skip the rest of processing too.

We can get rid of test_thread_flag because there's no longer any
opportunity for seccomp to mess with ptrace state before invoking
ptrace.

Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: x86@kernel.org
Cc: Andy Lutomirski <luto@kernel.org>
8 years agoseccomp: recheck the syscall after RET_TRACE
Kees Cook [Thu, 2 Jun 2016 02:29:15 +0000 (19:29 -0700)]
seccomp: recheck the syscall after RET_TRACE

When RET_TRACE triggers, a tracer may change a syscall into something that
should be filtered by seccomp. This re-runs seccomp after a trace event
to make sure things continue to pass.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@kernel.org>
8 years agoseccomp: remove 2-phase API
Kees Cook [Wed, 1 Jun 2016 23:02:17 +0000 (16:02 -0700)]
seccomp: remove 2-phase API

Since nothing is using the 2-phase API, and it adds more complexity than
benefit, remove it.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@kernel.org>
8 years agox86/entry: Get rid of two-phase syscall entry work
Andy Lutomirski [Fri, 27 May 2016 20:08:59 +0000 (13:08 -0700)]
x86/entry: Get rid of two-phase syscall entry work

I added two-phase syscall entry work back when the entry slow path
was very slow.  Nowadays, the entry slow path is fast and two-phase
entry work serves no purpose.  Remove it.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agoseccomp: Add a seccomp_data parameter secure_computing()
Andy Lutomirski [Fri, 27 May 2016 19:57:02 +0000 (12:57 -0700)]
seccomp: Add a seccomp_data parameter secure_computing()

Currently, if arch code wants to supply seccomp_data directly to
seccomp (which is generally much faster than having seccomp do it
using the syscall_get_xyz() API), it has to use the two-phase
seccomp hooks. Add it to the easy hooks, too.

Cc: linux-arch@vger.kernel.org
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agoseccomp: add tests for ptrace hole
Kees Cook [Thu, 26 May 2016 18:47:01 +0000 (11:47 -0700)]
seccomp: add tests for ptrace hole

One problem with seccomp was that ptrace could be used to change a
syscall after seccomp filtering had completed. This was a well documented
limitation, and it was recommended to block ptrace when defining a filter
to avoid this problem. This can be quite a limitation for containers or
other places where ptrace is desired even under seccomp filters.

This adds tests for both SECCOMP_RET_TRACE and PTRACE_SYSCALL manipulations.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@kernel.org>
8 years agosecurity: tomoyo: simplify the gc kthread creation
Mike Danese [Fri, 20 May 2016 04:37:53 +0000 (21:37 -0700)]
security: tomoyo: simplify the gc kthread creation

The code is doing the equivalent of the kthread_run macro.

Signed-off-by: Mike Danese <mikedanese@google.com>
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <james.l.morris@oracle.com>
8 years agonet: Use ns_capable_noaudit() when determining net sysctl permissions
Tyler Hicks [Fri, 3 Jun 2016 04:43:22 +0000 (23:43 -0500)]
net: Use ns_capable_noaudit() when determining net sysctl permissions

The capability check should not be audited since it is only being used
to determine the inode permissions. A failed check does not indicate a
violation of security policy but, when an LSM is enabled, a denial audit
message was being generated.

The denial audit message caused confusion for some application authors
because root-running Go applications always triggered the denial. To
prevent this confusion, the capability check in net_ctl_permissions() is
switched to the noaudit variant.

BugLink: https://launchpad.net/bugs/1465724
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
8 years agokernel: Add noaudit variant of ns_capable()
Tyler Hicks [Fri, 3 Jun 2016 04:43:21 +0000 (23:43 -0500)]
kernel: Add noaudit variant of ns_capable()

When checking the current cred for a capability in a specific user
namespace, it isn't always desirable to have the LSMs audit the check.
This patch adds a noaudit variant of ns_capable() for when those
situations arise.

The common logic between ns_capable() and the new ns_capable_noaudit()
is moved into a single, shared function to keep duplicated code to a
minimum and ease maintainability.

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
8 years agoLSM: Fix for security_inode_getsecurity and -EOPNOTSUPP
Casey Schaufler [Wed, 1 Jun 2016 00:24:15 +0000 (17:24 -0700)]
LSM: Fix for security_inode_getsecurity and -EOPNOTSUPP

Serge Hallyn pointed out that the current implementation of
security_inode_getsecurity() works if there is only one hook
provided for it, but will fail if there is more than one and
the attribute requested isn't supplied by the first module.
This isn't a problem today, since only SELinux and Smack
provide this hook and there is (currently) no way to enable
both of those modules at the same time. Serge, however, wants
to introduce a capability attribute and an inode_getsecurity
hook in the capability security module to handle it. This
addresses that upcoming problem, will be required for "extreme
stacking" and is just a better implementation.

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
8 years agoMAINTAINERS: update Serge Hallyn's email address
Serge E. Hallyn [Fri, 27 May 2016 19:23:39 +0000 (14:23 -0500)]
MAINTAINERS: update Serge Hallyn's email address

Author: Serge Hallyn <serge.hallyn@ubuntu.com>
Date:   Thu May 19 23:37:05 2016 -0500

    Update email address

    My canonical.com email address will soon stop working.

Signed-off-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
8 years agoLinux 4.7-rc2 v4.7-rc2
Linus Torvalds [Sun, 5 Jun 2016 21:31:26 +0000 (14:31 -0700)]
Linux 4.7-rc2

8 years agoMerge branch 'parisc-4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sun, 5 Jun 2016 18:15:33 +0000 (11:15 -0700)]
Merge branch 'parisc-4.7-2' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:

 - Fix printk time stamps on SMP systems which got wrong due to a patch
   which was added during the merge window

 - Fix two bugs in the stack backtrace code: Races in module unloading
   and possible invalid accesses to memory due to wrong instruction
   decoding (Mikulas Patocka)

 - Fix userspace crash when syscalls access invalid unaligned userspace
   addresses.  Those syscalls will now return EFAULT as expected.
   (tagged for stable kernel series)

* 'parisc-4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Move die_if_kernel() prototype into traps.h header
  parisc: Fix pagefault crash in unaligned __get_user() call
  parisc: Fix printk time during boot
  parisc: Fix backtrace on PA-RISC

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Sun, 5 Jun 2016 18:02:00 +0000 (11:02 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security

Pull key handling update from James Morris:
 "This alters a new keyctl function added in the current merge window to
  allow for a future extension planned for the next merge window"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  KEYS: Add placeholder for KDF usage with DH

8 years agodevpts: Make each mount of devpts an independent filesystem.
Eric W. Biederman [Thu, 2 Jun 2016 15:29:47 +0000 (10:29 -0500)]
devpts: Make each mount of devpts an independent filesystem.

The /dev/ptmx device node is changed to lookup the directory entry "pts"
in the same directory as the /dev/ptmx device node was opened in.  If
there is a "pts" entry and that entry is a devpts filesystem /dev/ptmx
uses that filesystem.  Otherwise the open of /dev/ptmx fails.

The DEVPTS_MULTIPLE_INSTANCES configuration option is removed, so that
userspace can now safely depend on each mount of devpts creating a new
instance of the filesystem.

Each mount of devpts is now a separate and equal filesystem.

Reserved ttys are now available to all instances of devpts where the
mounter is in the initial mount namespace.

A new vfs helper path_pts is introduced that finds a directory entry
named "pts" in the directory of the passed in path, and changes the
passed in path to point to it.  The helper path_pts uses a function
path_parent_directory that was factored out of follow_dotdot.

In the implementation of devpts:
 - devpts_mnt is killed as it is no longer meaningful if all mounts of
   devpts are equal.
 - pts_sb_from_inode is replaced by just inode->i_sb as all cached
   inodes in the tty layer are now from the devpts filesystem.
 - devpts_add_ref is rolled into the new function devpts_ptmx.  And the
   unnecessary inode hold is removed.
 - devpts_del_ref is renamed devpts_release and reduced to just a
   deacrivate_super.
 - The newinstance mount option continues to be accepted but is now
   ignored.

In devpts_fs.h definitions for when !CONFIG_UNIX98_PTYS are removed as
they are never used.

Documentation/filesystems/devices.txt is updated to describe the current
situation.

This has been verified to work properly on openwrt-15.05, centos5,
centos6, centos7, debian-6.0.2, debian-7.9, debian-8.2, ubuntu-14.04.3,
ubuntu-15.10, fedora23, magia-5, mint-17.3, opensuse-42.1,
slackware-14.1, gentoo-20151225 (13.0?), archlinux-2015-12-01.  With the
caveat that on centos6 and on slackware-14.1 that there wind up being
two instances of the devpts filesystem mounted on /dev/pts, the lower
copy does not end up getting used.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Greg KH <greg@kroah.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Serge Hallyn <serge.hallyn@ubuntu.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: Jann Horn <jann@thejh.net>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Florian Weimer <fw@deneb.enyo.de>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoparisc: Move die_if_kernel() prototype into traps.h header
Helge Deller [Sat, 4 Jun 2016 15:38:09 +0000 (17:38 +0200)]
parisc: Move die_if_kernel() prototype into traps.h header

Signed-off-by: Helge Deller <deller@gmx.de>
8 years agoparisc: Fix pagefault crash in unaligned __get_user() call
Helge Deller [Sat, 4 Jun 2016 15:21:33 +0000 (17:21 +0200)]
parisc: Fix pagefault crash in unaligned __get_user() call

One of the debian buildd servers had this crash in the syslog without
any other information:

 Unaligned handler failed, ret = -2
 clock_adjtime (pid 22578): Unaligned data reference (code 28)
 CPU: 1 PID: 22578 Comm: clock_adjtime Tainted: G  E  4.5.0-2-parisc64-smp #1 Debian 4.5.4-1
 task: 000000007d9960f8 ti: 00000001bde7c000 task.ti: 00000001bde7c000

      YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
 PSW: 00001000000001001111100000001111 Tainted: G            E
 r00-03  000000ff0804f80f 00000001bde7c2b0 00000000402d2be8 00000001bde7c2b0
 r04-07  00000000409e1fd0 00000000fa6f7fff 00000001bde7c148 00000000fa6f7fff
 r08-11  0000000000000000 00000000ffffffff 00000000fac9bb7b 000000000002b4d4
 r12-15  000000000015241c 000000000015242c 000000000000002d 00000000fac9bb7b
 r16-19  0000000000028800 0000000000000001 0000000000000070 00000001bde7c218
 r20-23  0000000000000000 00000001bde7c210 0000000000000002 0000000000000000
 r24-27  0000000000000000 0000000000000000 00000001bde7c148 00000000409e1fd0
 r28-31  0000000000000001 00000001bde7c320 00000001bde7c350 00000001bde7c218
 sr00-03  0000000001200000 0000000001200000 0000000000000000 0000000001200000
 sr04-07  0000000000000000 0000000000000000 0000000000000000 0000000000000000

 IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000402d2e84 00000000402d2e88
  IIR: 0ca0d089    ISR: 0000000001200000  IOR: 00000000fa6f7fff
  CPU:        1   CR30: 00000001bde7c000 CR31: ffffffffffffffff
  ORIG_R28: 00000002369fe628
  IAOQ[0]: compat_get_timex+0x2dc/0x3c0
  IAOQ[1]: compat_get_timex+0x2e0/0x3c0
  RP(r2): compat_get_timex+0x40/0x3c0
 Backtrace:
  [<00000000402d4608>] compat_SyS_clock_adjtime+0x40/0xc0
  [<0000000040205024>] syscall_exit+0x0/0x14

This means the userspace program clock_adjtime called the clock_adjtime()
syscall and then crashed inside the compat_get_timex() function.
Syscalls should never crash programs, but instead return EFAULT.

The IIR register contains the executed instruction, which disassebles
into "ldw 0(sr3,r5),r9".
This load-word instruction is part of __get_user() which tried to read the word
at %r5/IOR (0xfa6f7fff). This means the unaligned handler jumped in.  The
unaligned handler is able to emulate all ldw instructions, but it fails if it
fails to read the source e.g. because of page fault.

The following program reproduces the problem:

#define _GNU_SOURCE
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/mman.h>

int main(void) {
        /* allocate 8k */
        char *ptr = mmap(NULL, 2*4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
        /* free second half (upper 4k) and make it invalid. */
        munmap(ptr+4096, 4096);
        /* syscall where first int is unaligned and clobbers into invalid memory region */
        /* syscall should return EFAULT */
        return syscall(__NR_clock_adjtime, 0, ptr+4095);
}

To fix this issue we simply need to check if the faulting instruction address
is in the exception fixup table when the unaligned handler failed. If it
is, call the fixup routine instead of crashing.

While looking at the unaligned handler I found another issue as well: The
target register should not be modified if the handler was unsuccessful.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
8 years agoparisc: Fix printk time during boot
Helge Deller [Fri, 3 Jun 2016 17:22:31 +0000 (19:22 +0200)]
parisc: Fix printk time during boot

Avoid showing invalid printk time stamps during boot.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Aaro Koskinen <aaro.koskinen@iki.fi>
8 years agoparisc: Fix backtrace on PA-RISC
Mikulas Patocka [Tue, 28 Jun 2011 22:48:19 +0000 (00:48 +0200)]
parisc: Fix backtrace on PA-RISC

This patch fixes backtrace on PA-RISC

There were several problems:

1) The code that decodes instructions handles instructions that subtract
from the stack pointer incorrectly. If the instruction subtracts the
number X from the stack pointer the code increases the frame size by
(0x100000000-X).  This results in invalid accesses to memory and
recursive page faults.

2) Because gcc reorders blocks, handling instructions that subtract from
the frame pointer is incorrect. For example, this function
int f(int a)
{
if (__builtin_expect(a, 1))
return a;
g();
return a;
}
is compiled in such a way, that the code that decreases the stack
pointer for the first "return a" is placed before the code for "g" call.
If we recognize this decrement, we mistakenly believe that the frame
size for the "g" call is zero.

To fix problems 1) and 2), the patch doesn't recognize instructions that
decrease the stack pointer at all. To further safeguard the unwind code
against nonsense values, we don't allow frame size larger than
Total_frame_size.

3) The backtrace is not locked. If stack dump races with module unload,
invalid table can be accessed.

This patch adds a spinlock when processing module tables.

Note, that for correct backtrace, you need recent binutils.
Binutils 2.18 from Debian 5 produce garbage unwind tables.
Binutils 2.21 work better (it sometimes forgets function frames, but at
least it doesn't generate garbage).

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agoMerge tag 'drm-fixes-for-v4.7-rc2' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 4 Jun 2016 19:30:36 +0000 (12:30 -0700)]
Merge tag 'drm-fixes-for-v4.7-rc2' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "A bunch of ARM drivers got into the fixes vibe this time around, so
  this contains a bunch of fixes for imx, atmel hlcdc, arm hdlcd (only
  so many combos of hlcd), mediatek and omap drm.

  Other than that there is one mgag200 fix and a few core drm regression
  fixes"

* tag 'drm-fixes-for-v4.7-rc2' of git://people.freedesktop.org/~airlied/linux: (34 commits)
  drm/omap: fix unused variable warning.
  drm: hdlcd: Add information about the underlying framebuffers in debugfs
  drm: hdlcd: Cleanup the atomic plane operations
  drm/hdlcd: Fix up crtc_state->event handling
  drm: hdlcd: Revamp runtime power management
  drm/mediatek: mtk_dsi: Remove spurious drm_connector_unregister
  drm/mediatek: mtk_dpi: remove invalid error message
  drm: atmel-hlcdc: fix a NULL check
  drm: atmel-hlcdc: fix atmel_hlcdc_crtc_reset() implementation
  drm/mgag200: Black screen fix for G200e rev 4
  drm: Wrap direct calls to driver->gem_free_object from CMA
  drm: fix fb refcount issue with atomic modesetting
  drm: make drm_atomic_set_mode_prop_for_crtc() more reliable
  drm/sti: remove extra mode fixup
  drm: add missing drm_mode_set_crtcinfo call
  drm/omap: include gpio/consumer.h where needed
  drm/omap: include linux/seq_file.h where needed
  Revert "drm/omap: no need to select OMAP2_DSS"
  drm/omap: Remove regulator API abuse
  OMAPDSS: HDMI5: Change DDC timings
  ...

8 years agoMerge tag 'vfio-v4.7-rc2' of git://github.com/awilliam/linux-vfio
Linus Torvalds [Sat, 4 Jun 2016 19:25:36 +0000 (12:25 -0700)]
Merge tag 'vfio-v4.7-rc2' of git://github.com/awilliam/linux-vfio

Pull VFIO fixes from Alex Williamson:
 "Fix irqfd shutdown ordering, build warning, and VPD short read"

* tag 'vfio-v4.7-rc2' of git://github.com/awilliam/linux-vfio:
  vfio/pci: Allow VPD short read
  vfio/type1: Fix build warning
  vfio/pci: Fix ordering of eventfd vs virqfd shutdown

8 years agoMerge tag 'mmc-v4.7-rc1-2' of git://git.linaro.org/people/ulf.hansson/mmc
Linus Torvalds [Sat, 4 Jun 2016 19:20:26 +0000 (12:20 -0700)]
Merge tag 'mmc-v4.7-rc1-2' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Fix/restore behaviour when selecting bus width for (e)MMC

  MMC host:
   - sunxi: Fix eMMC HS-DDR modes on Allwinner A80"

* tag 'mmc-v4.7-rc1-2' of git://git.linaro.org/people/ulf.hansson/mmc:
  mmc: sunxi: Re-enable eMMC HS-DDR modes on Allwinner A80
  mmc: sunxi: Fix DDR MMC timings for A80
  mmc: fix mmc mode selection for HS-DDR and higher

8 years agoMerge branch 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
Linus Torvalds [Sat, 4 Jun 2016 18:56:28 +0000 (11:56 -0700)]
Merge branch 'for-linus-4.7' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "The important part of this pull is Filipe's set of fixes for btrfs
  device replacement.  Filipe fixed a few issues seen on the list and a
  number he found on his own"

* 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: deal with duplciates during extent_map insertion in btrfs_get_extent
  Btrfs: fix race between device replace and read repair
  Btrfs: fix race between device replace and discard
  Btrfs: fix race between device replace and chunk allocation
  Btrfs: fix race setting block group back to RW mode during device replace
  Btrfs: fix unprotected assignment of the left cursor for device replace
  Btrfs: fix race setting block group readonly during device replace
  Btrfs: fix race between device replace and block group removal
  Btrfs: fix race between readahead and device replace/removal

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Sat, 4 Jun 2016 18:37:53 +0000 (11:37 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

Pull Ceph fixes from Sage Weil:
 "We have a few follow-up fixes for the libceph refactor from Ilya, and
  then some cephfs + fscache fixes from Zheng.

  The first two FS-Cache patches are acked by David Howells and deemed
  trivial enough to go through our tree.  The rest fix some issues with
  the ceph fscache handling (disable cache for inodes opened for write,
  and simplify the revalidation logic accordingly, dropping the
  now-unnecessary work queue)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: use i_version to check validity of fscache
  ceph: improve fscache revalidation
  ceph: disable fscache when inode is opened for write
  ceph: avoid unnecessary fscache invalidation/revlidation
  ceph: call __fscache_uncache_page() if readpages fails
  FS-Cache: make check_consistency callback return int
  FS-Cache: wake write waiter after invalidating writes
  libceph: use %s instead of %pE in dout()s
  libceph: put request only if it's done in handle_reply()
  libceph: change ceph_osdmap_flag() to take osdc

8 years agoMerge tag 'acpi-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Sat, 4 Jun 2016 18:26:49 +0000 (11:26 -0700)]
Merge tag 'acpi-4.7-rc2' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "Two fixes for problems introduced recently (ACPICA and the ACPI
  backlight driver) and one fix for an older issue that prevents at
  least one system from booting.

  Specifics:

   - Fix an incorrect check introduced by recent ACPICA changes which
     causes problems with booting KVM guests to happen, among other
     things (Lv Zheng).

   - Fix a backlight issue introduced by recent changes to the ACPI
     video driver (Aaron Lu).

   - Fix the ACPI processor initialization which attempts to register an
     IO region without checking if that really is necessary and
     sometimes prevents drivers loaded subsequently from registering
     their resources which leads to boot issues (Rafael Wysocki)"

* tag 'acpi-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / processor: Avoid reserving IO regions too early
  ACPICA / Hardware: Fix old register check in acpi_hw_get_access_bit_width()
  ACPI / Thermal / video: fix max_level incorrect value

8 years agoMerge tag 'pm-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Sat, 4 Jun 2016 18:07:57 +0000 (11:07 -0700)]
Merge tag 'pm-4.7-rc2' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Two fixes for problems introduced recently in the cpufreq core and the
  intel_pstate driver.

  Specifics:

   - Fix a silly mistake related to the clamp_val() usage in a function
     added by a recent commit (Rafael Wysocki).

   - Reduce the log level of an annoying message added to intel_pstate
     during the recent merge window (Srinivas Pandruvada)"

* tag 'pm-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: Fix clamp_val() usage in cpufreq_driver_fast_switch()
  cpufreq: intel_pstate: Downgrade print level for _PPC

8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 4 Jun 2016 17:51:29 +0000 (10:51 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge various fixes from Andrew Morton:
 "10 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm, page_alloc: recalculate the preferred zoneref if the context can ignore memory policies
  mm, page_alloc: reset zonelist iterator after resetting fair zone allocation policy
  mm, oom_reaper: do not use siglock in try_oom_reaper()
  mm, page_alloc: prevent infinite loop in buffered_rmqueue()
  checkpatch: reduce git commit description style false positives
  mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup
  memcg: add RCU locking around css_for_each_descendant_pre() in memcg_offline_kmem()
  mm: check the return value of lookup_page_ext for all call sites
  kdump: fix dmesg gdbmacro to work with record based printk
  mm: fix overflow in vm_map_ram()

8 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 3 Jun 2016 23:12:35 +0000 (16:12 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 - a few simple fixes for fallout from the recent gic-v3 changes
 - a workaround for a Cavium thunderX erratum
 - a bugfix for the pic32 irqchip to make external interrupts work proper
 - a missing return value in the generic IPI management code

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/irq-pic32-evic: Fix bug with external interrupts.
  irqchip/gicv3-its: numa: Enable workaround for Cavium thunderx erratum 23144
  irqchip/gic-v3: Fix quiescence check in gic_enable_redist
  irqchip/gic-v3: Fix copy+paste mistakes in defines
  irqchip/gic-v3: Fix ICC_SGI1R_EL1.INTID decoding mask
  genirq: Fix missing return value in irq_destroy_ipi()

8 years agomm, page_alloc: recalculate the preferred zoneref if the context can ignore memory...
Mel Gorman [Fri, 3 Jun 2016 21:56:01 +0000 (14:56 -0700)]
mm, page_alloc: recalculate the preferred zoneref if the context can ignore memory policies

The optimistic fast path may use cpuset_current_mems_allowed instead of
of a NULL nodemask supplied by the caller for cpuset allocations.  The
preferred zone is calculated on this basis for statistic purposes and as
a starting point in the zonelist iterator.

However, if the context can ignore memory policies due to being atomic
or being able to ignore watermarks then the starting point in the
zonelist iterator is no longer correct.  This patch resets the zonelist
iterator in the allocator slowpath if the context can ignore memory
policies.  This will alter the zone used for statistics but only after
it is known that it makes sense for that context.  Resetting it before
entering the slowpath would potentially allow an ALLOC_CPUSET allocation
to be accounted for against the wrong zone.  Note that while nodemask is
not explicitly set to the original nodemask, it would only have been
overwritten if cpuset_enabled() and it was reset before the slowpath was
entered.

Link: http://lkml.kernel.org/r/20160602103936.GU2527@techsingularity.net
Fixes: c33d6c06f60f710 ("mm, page_alloc: avoid looking up the first zone in a zonelist twice")
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, page_alloc: reset zonelist iterator after resetting fair zone allocation policy
Mel Gorman [Fri, 3 Jun 2016 21:55:58 +0000 (14:55 -0700)]
mm, page_alloc: reset zonelist iterator after resetting fair zone allocation policy

Geert Uytterhoeven reported the following problem that bisected to
commit c33d6c06f60f ("mm, page_alloc: avoid looking up the first zone
in a zonelist twice") on m68k/ARAnyM

    BUG: scheduling while atomic: cron/668/0x10c9a0c0
    Modules linked in:
    CPU: 0 PID: 668 Comm: cron Not tainted 4.6.0-atari-05133-gc33d6c06f60f710f #364
    Call Trace: [<0003d7d0>] __schedule_bug+0x40/0x54
      __schedule+0x312/0x388
      __schedule+0x0/0x388
      prepare_to_wait+0x0/0x52
      schedule+0x64/0x82
      schedule_timeout+0xda/0x104
      set_next_entity+0x18/0x40
      pick_next_task_fair+0x78/0xda
      io_schedule_timeout+0x36/0x4a
      bit_wait_io+0x0/0x40
      bit_wait_io+0x12/0x40
      __wait_on_bit+0x46/0x76
      wait_on_page_bit_killable+0x64/0x6c
      bit_wait_io+0x0/0x40
      wake_bit_function+0x0/0x4e
      __lock_page_or_retry+0xde/0x124
      do_scan_async+0x114/0x17c
      lookup_swap_cache+0x24/0x4e
      handle_mm_fault+0x626/0x7de
      find_vma+0x0/0x66
      down_read+0x0/0xe
      wait_on_page_bit_killable_timeout+0x77/0x7c
      find_vma+0x16/0x66
      do_page_fault+0xe6/0x23a
      res_func+0xa3c/0x141a
      buserr_c+0x190/0x6d4
      res_func+0xa3c/0x141a
      buserr+0x20/0x28
      res_func+0xa3c/0x141a
      buserr+0x20/0x28

The relationship is not obvious but it's due to a failure to rescan the
full zonelist after the fair zone allocation policy exhausts the batch
count.  While this is a functional problem, it's also a performance
issue.  A page allocator microbenchmark showed the following

                                   4.7.0-rc1                  4.7.0-rc1
                                     vanilla                 reset-v1r2
  Min      alloc-odr0-1     327.00 (  0.00%)           326.00 (  0.31%)
  Min      alloc-odr0-2     235.00 (  0.00%)           235.00 (  0.00%)
  Min      alloc-odr0-4     198.00 (  0.00%)           198.00 (  0.00%)
  Min      alloc-odr0-8     170.00 (  0.00%)           170.00 (  0.00%)
  Min      alloc-odr0-16    156.00 (  0.00%)           156.00 (  0.00%)
  Min      alloc-odr0-32    150.00 (  0.00%)           150.00 (  0.00%)
  Min      alloc-odr0-64    146.00 (  0.00%)           146.00 (  0.00%)
  Min      alloc-odr0-128   145.00 (  0.00%)           145.00 (  0.00%)
  Min      alloc-odr0-256   155.00 (  0.00%)           155.00 (  0.00%)
  Min      alloc-odr0-512   168.00 (  0.00%)           165.00 (  1.79%)
  Min      alloc-odr0-1024  175.00 (  0.00%)           174.00 (  0.57%)
  Min      alloc-odr0-2048  180.00 (  0.00%)           180.00 (  0.00%)
  Min      alloc-odr0-4096  187.00 (  0.00%)           186.00 (  0.53%)
  Min      alloc-odr0-8192  190.00 (  0.00%)           190.00 (  0.00%)
  Min      alloc-odr0-16384 191.00 (  0.00%)           191.00 (  0.00%)
  Min      alloc-odr1-1     736.00 (  0.00%)           445.00 ( 39.54%)
  Min      alloc-odr1-2     343.00 (  0.00%)           335.00 (  2.33%)
  Min      alloc-odr1-4     277.00 (  0.00%)           270.00 (  2.53%)
  Min      alloc-odr1-8     238.00 (  0.00%)           233.00 (  2.10%)
  Min      alloc-odr1-16    224.00 (  0.00%)           218.00 (  2.68%)
  Min      alloc-odr1-32    210.00 (  0.00%)           208.00 (  0.95%)
  Min      alloc-odr1-64    207.00 (  0.00%)           203.00 (  1.93%)
  Min      alloc-odr1-128   276.00 (  0.00%)           202.00 ( 26.81%)
  Min      alloc-odr1-256   206.00 (  0.00%)           202.00 (  1.94%)
  Min      alloc-odr1-512   207.00 (  0.00%)           202.00 (  2.42%)
  Min      alloc-odr1-1024  208.00 (  0.00%)           205.00 (  1.44%)
  Min      alloc-odr1-2048  213.00 (  0.00%)           212.00 (  0.47%)
  Min      alloc-odr1-4096  218.00 (  0.00%)           216.00 (  0.92%)
  Min      alloc-odr1-8192  341.00 (  0.00%)           219.00 ( 35.78%)

Note that order-0 allocations are unaffected but higher orders get a
small boost from this patch and a large reduction in system CPU usage
overall as can be seen here:

             4.7.0-rc1   4.7.0-rc1
               vanilla  reset-v1r2
  User           85.32       86.31
  System       2221.39     2053.36
  Elapsed      2368.89     2202.47

Fixes: c33d6c06f60f ("mm, page_alloc: avoid looking up the first zone in a zonelist twice")
Link: http://lkml.kernel.org/r/20160531100848.GR2527@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, oom_reaper: do not use siglock in try_oom_reaper()
Michal Hocko [Fri, 3 Jun 2016 21:55:55 +0000 (14:55 -0700)]
mm, oom_reaper: do not use siglock in try_oom_reaper()

Oleg has noted that siglock usage in try_oom_reaper is both pointless
and dangerous.  signal_group_exit can be checked lockless.  The problem
is that sighand becomes NULL in __exit_signal so we can crash.

Fixes: 3ef22dfff239 ("oom, oom_reaper: try to reap tasks which skip regular OOM killer path")
Link: http://lkml.kernel.org/r/1464679423-30218-1-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm, page_alloc: prevent infinite loop in buffered_rmqueue()
Vlastimil Babka [Fri, 3 Jun 2016 21:55:52 +0000 (14:55 -0700)]
mm, page_alloc: prevent infinite loop in buffered_rmqueue()

In DEBUG_VM kernel, we can hit infinite loop for order == 0 in
buffered_rmqueue() when check_new_pcp() returns 1, because the bad page
is never removed from the pcp list.  Fix this by removing the page
before retrying.  Also we don't need to check if page is non-NULL,
because we simply grab it from the list which was just tested for being
non-empty.

Fixes: 479f854a207c ("mm, page_alloc: defer debugging checks of pages allocated from the PCP")
Link: http://lkml.kernel.org/r/20160530090154.GM2527@techsingularity.net
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reported-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agocheckpatch: reduce git commit description style false positives
Joe Perches [Fri, 3 Jun 2016 21:55:49 +0000 (14:55 -0700)]
checkpatch: reduce git commit description style false positives

Some lines in a commit log appear to be commit SHA1 ids like:

  ERROR: Please use git commit description style 'commit <12+ chars of sha1> ("<title line>")' - ie: 'commit 0123456789ab ("commit description")'
Link: http://lkml.kernel.org/r/40e03fd7aaf1f55c75d787128d6d17c5a71226c2.1464358556.git.vdavydov@virtuozzo.com
Reduce the false positives.

Link: http://lkml.kernel.org/r/eda977eaa8328fef42bb3c87935d97e10ea8ff67.1464384023.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm/z3fold.c: avoid modifying HEADLESS page and minor cleanup
Vitaly Wool [Fri, 3 Jun 2016 21:55:47 +0000 (14:55 -0700)]
mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup

Fix erroneous z3fold header access in a HEADLESS page in reclaim
function, and change one remaining direct handle-to-buddy conversion to
use the appropriate helper.

Link: http://lkml.kernel.org/r/5748706F.9020208@gmail.com
Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Reviewed-by: Dan Streetman <ddstreet@ieee.org>
Cc: Seth Jennings <sjenning@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomemcg: add RCU locking around css_for_each_descendant_pre() in memcg_offline_kmem()
Tejun Heo [Fri, 3 Jun 2016 21:55:44 +0000 (14:55 -0700)]
memcg: add RCU locking around css_for_each_descendant_pre() in memcg_offline_kmem()

memcg_offline_kmem() may be called from memcg_free_kmem() after a css
init failure.  memcg_free_kmem() is a ->css_free callback which is
called without cgroup_mutex and memcg_offline_kmem() ends up using
css_for_each_descendant_pre() without any locking.  Fix it by adding rcu
read locking around it.

    mkdir: cannot create directory `65530': No space left on device
    ===============================
    [ INFO: suspicious RCU usage. ]
    4.6.0-work+ #321 Not tainted
    -------------------------------
    kernel/cgroup.c:4008 cgroup_mutex or RCU read lock required!
     [  527.243970] other info that might help us debug this:
     [  527.244715]
    rcu_scheduler_active = 1, debug_locks = 0
    2 locks held by kworker/0:5/1664:
     #0:  ("cgroup_destroy"){.+.+..}, at: [<ffffffff81060ab5>] process_one_work+0x165/0x4a0
     #1:  ((&css->destroy_work)#3){+.+...}, at: [<ffffffff81060ab5>] process_one_work+0x165/0x4a0
     [  527.248098] stack backtrace:
    CPU: 0 PID: 1664 Comm: kworker/0:5 Not tainted 4.6.0-work+ #321
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.1-1.fc24 04/01/2014
    Workqueue: cgroup_destroy css_free_work_fn
    Call Trace:
      dump_stack+0x68/0xa1
      lockdep_rcu_suspicious+0xd7/0x110
      css_next_descendant_pre+0x7d/0xb0
      memcg_offline_kmem.part.44+0x4a/0xc0
      mem_cgroup_css_free+0x1ec/0x200
      css_free_work_fn+0x49/0x5e0
      process_one_work+0x1c5/0x4a0
      worker_thread+0x49/0x490
      kthread+0xea/0x100
      ret_from_fork+0x1f/0x40

Link: http://lkml.kernel.org/r/20160526203018.GG23194@mtj.duckdns.org
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org> [4.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 3 Jun 2016 22:37:27 +0000 (15:37 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer bugfix from Thomas Gleixner:
 "A single bugfix for the error check wreckage we introduced in the
  merge window"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  time: Make settimeofday error checking work again

8 years agomm: check the return value of lookup_page_ext for all call sites
Yang Shi [Fri, 3 Jun 2016 21:55:38 +0000 (14:55 -0700)]
mm: check the return value of lookup_page_ext for all call sites

Per the discussion with Joonsoo Kim [1], we need check the return value
of lookup_page_ext() for all call sites since it might return NULL in
some cases, although it is unlikely, i.e.  memory hotplug.

Tested with ltp with "page_owner=0".

[1] http://lkml.kernel.org/r/20160519002809.GA10245@js1304-P5Q-DELUXE

[akpm@linux-foundation.org: fix build-breaking typos]
[arnd@arndb.de: fix build problems from lookup_page_ext]
Link: http://lkml.kernel.org/r/6285269.2CksypHdYp@wuerfel
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/1464023768-31025-1-git-send-email-yang.shi@linaro.org
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agokdump: fix dmesg gdbmacro to work with record based printk
Corey Minyard [Fri, 3 Jun 2016 21:55:36 +0000 (14:55 -0700)]
kdump: fix dmesg gdbmacro to work with record based printk

Commit 7ff9554bb578 ("printk: convert byte-buffer to variable-length
record buffer") introduced a record based printk buffer.  Modify
gdbmacros.txt to parse this new structure so dmesg will work properly.

Link: http://lkml.kernel.org/r/1463515794-1599-1-git-send-email-minyard@acm.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agomm: fix overflow in vm_map_ram()
Guillermo Julián Moreno [Fri, 3 Jun 2016 21:55:33 +0000 (14:55 -0700)]
mm: fix overflow in vm_map_ram()

When remapping pages accounting for 4G or more memory space, the
operation 'count << PAGE_SHIFT' overflows as it is performed on an
integer.  Solution: cast before doing the bitshift.

[akpm@linux-foundation.org: fix vm_unmap_ram() also]
[akpm@linux-foundation.org: fix vmap() as well, per Guillermo]
Link: http://lkml.kernel.org/r/etPan.57175fb3.7a271c6b.2bd@naudit.es
Signed-off-by: Guillermo Julián Moreno <guillermo.julian@naudit.es>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Fri, 3 Jun 2016 21:39:29 +0000 (14:39 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fix from Russell King:
 "Just one fix to the ptrace code, spotted by Simon Marchi, where if a
  thread migrates to a different CPU and the VFP registers are changed
  through ptrace, the application doesn't see the updated VFP registers"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: fix PTRACE_SETVFPREGS on SMP systems

8 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 3 Jun 2016 21:29:47 +0000 (14:29 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "The main thing here is reviving hugetlb support using contiguous ptes,
  which we ended up reverting at the last minute in 4.5 pending a fix
  which went into the core mm/ code during the recent merge window.

   - Revert a previous revert and get hugetlb going with contiguous hints
   - Wire up missing compat syscalls
   - Enable CONFIG_SET_MODULE_RONX by default
   - Add missing line to our compat /proc/cpuinfo output
   - Clarify levels in our page table dumps
   - Fix booting with RANDOMIZE_TEXT_OFFSET enabled
   - Misc fixes to the ARM CPU PMU driver (refcounting, probe failure)
   - Remove some dead code and update a comment"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: fix alignment when RANDOMIZE_TEXT_OFFSET is enabled
  arm64: move {PAGE,CONT}_SHIFT into Kconfig
  arm64: mm: dump: log span level
  arm64: update stale PAGE_OFFSET comment
  drivers/perf: arm_pmu: Avoid leaking pmu->irq_affinity on error
  drivers/perf: arm_pmu: Defer the setting of __oprofile_cpu_pmu
  drivers/perf: arm_pmu: Fix reference count of a device_node in of_pmu_irq_cfg
  arm64: report CPU number in bad_mode
  arm64: unistd32.h: wire up missing syscalls for compat tasks
  arm64: Provide "model name" in /proc/cpuinfo for PER_LINUX32 tasks
  arm64: enable CONFIG_SET_MODULE_RONX by default
  arm64: Remove orphaned __addr_ok() definition
  Revert "arm64: hugetlb: partial revert of 66b3923a1a0f"

8 years agoMerge tag 'powerpc-4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 3 Jun 2016 21:20:22 +0000 (14:20 -0700)]
Merge tag 'powerpc-4.7-2' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 - Handle RTAS delay requests in configure_bridge from Russell Currey
 - Refactor the configure_bridge RTAS tokens from Russell Currey
 - Fix definition of SIAR and SDAR registers from Thomas Huth
 - Use privileged SPR number for MMCR2 from Thomas Huth
 - Update LPCR only if it is powernv from Aneesh Kumar K.V
 - Fix the reference bit update when handling hash fault from Aneesh
   Kumar K.V
 - Add missing tlb flush from Aneesh Kumar K.V
 - Add POWER8NVL support to ibm,client-architecture-support call from
   Thomas Huth

* tag 'powerpc-4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call
  powerpc/mm/radix: Add missing tlb flush
  powerpc/mm/hash: Fix the reference bit update when handling hash fault
  powerpc/mm/radix: Update LPCR only if it is powernv
  powerpc: Use privileged SPR number for MMCR2
  powerpc: Fix definition of SIAR and SDAR registers
  powerpc/pseries/eeh: Refactor the configure_bridge RTAS tokens
  powerpc/pseries/eeh: Handle RTAS delay requests in configure_bridge

8 years agoMerge branches 'acpica-fixes', 'acpi-video' and 'acpi-processor'
Rafael J. Wysocki [Fri, 3 Jun 2016 20:35:05 +0000 (22:35 +0200)]
Merge branches 'acpica-fixes', 'acpi-video' and 'acpi-processor'

* acpica-fixes:
  ACPICA / Hardware: Fix old register check in acpi_hw_get_access_bit_width()

* acpi-video:
  ACPI / Thermal / video: fix max_level incorrect value

* acpi-processor:
  ACPI / processor: Avoid reserving IO regions too early

8 years agoMerge branch 'pm-cpufreq-fixes'
Rafael J. Wysocki [Fri, 3 Jun 2016 20:34:18 +0000 (22:34 +0200)]
Merge branch 'pm-cpufreq-fixes'

* pm-cpufreq-fixes:
  cpufreq: Fix clamp_val() usage in cpufreq_driver_fast_switch()
  cpufreq: intel_pstate: Downgrade print level for _PPC