platform/kernel/linux-rpi.git
3 years agousb: typec: tcpci: Add support to report vSafe0V
Badhri Jagan Sridharan [Wed, 2 Dec 2020 04:08:39 +0000 (20:08 -0800)]
usb: typec: tcpci: Add support to report vSafe0V

This change adds vbus_vsafe0v which when set, makes TCPM
query for VSAFE0V by assigning the tcpc.is_vbus_vsafe0v callback.
Also enables ALERT.ExtendedStatus which is triggered when
status of EXTENDED_STATUS.vSafe0V changes.
EXTENDED_STATUS.vSafe0V is set when vbus is at vSafe0V and
cleared otherwise.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20201202040840.663578-2-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: typec: tcpm: Introduce vsafe0v for vbus
Badhri Jagan Sridharan [Wed, 2 Dec 2020 04:08:38 +0000 (20:08 -0800)]
usb: typec: tcpm: Introduce vsafe0v for vbus

TCPM at present lacks the notion of VSAFE0V. There
are three vbus threshold levels that are critical to track:
a. vSafe5V         - VBUS “5 volts” as defined by the USB
                     PD specification.
b. vSinkDisconnect - Threshold used for transition from
                     Attached.SNK to Unattached.SNK.
c. vSafe0V         - VBUS “0 volts” as defined by the USB
                     PD specification.

Tracking vSafe0V is crucial for entry into Try.SNK and
Attached.SRC and turning vbus back on by the source in
response to hard reset.

>From "4.5.2.2.8.2 Exiting from AttachWait.SRC State" section
in the Type-C spec:

"The port shall transition to Attached.SRC when VBUS is at
vSafe0V and the SRC.Rd state is detected on exactly one of
the CC1 or CC2 pins for at least tCCDebounce."

"A DRP that strongly prefers the Sink role may optionally
transition to Try.SNK instead of Attached.SRC when VBUS
is at vSafe0V and the SRC.Rd state is detected on exactly
one of the CC1 or CC2 pins for at least tCCDebounce."

>From "7.1.5 Response to Hard Resets" section in the PD spec:

"After establishing the vSafe0V voltage condition on VBUS,
the Source Shall wait tSrcRecover before re-applying VCONN
and restoring VBUS to vSafe5V."

vbus_present in the TCPM code tracks vSafe5V(vbus_present is true)
and vSinkDisconnect(vbus_present is false).

This change adds is_vbus_vsafe0v callback which when set makes
TCPM query for vSafe0V voltage level when needed.

Since not all TCPC controllers might have the capability
to report vSafe0V, TCPM assumes that vSafe0V is same as
vSinkDisconnect when is_vbus_vsafe0v callback is not set.
This allows TCPM to continue to support controllers which don't
have the support for reporting vSafe0V.

Introducing vSafe0V helps fix the failure reported at
"Step 15. CVS verifies PUT remains in AttachWait.SRC for 500ms"
of "TD 4.7.2 Try. SNK DRP Connect DRP Test" of
"Universal Serial Bus Type-C (USB Type-C) Functional Test
Specification Chapters 4 and 5". Here the compliance tester
intentionally maintains vbus at greater than vSafe0V and expects
the Product under test to stay in AttachWait.SRC till vbus drops
to vSafe0V.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20201202040840.663578-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: typec: tcpm: Clear send_discover in tcpm_check_send_discover
Badhri Jagan Sridharan [Thu, 3 Dec 2020 03:19:08 +0000 (19:19 -0800)]
usb: typec: tcpm: Clear send_discover in tcpm_check_send_discover

tcpm_check_send_discover does not clear the send_discover flag
when any of the following conditions are not met.
1. data_role is TYPEC_HOST
2. link is pd_capable

Discovery indentity would anyways not be attempted during
the current session anymore when the above conditions are not
met. Hence clear the send_discover flag here to prevent
tcpm_enable_frs_work from rescheduling indefinetly.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20201203031908.1491542-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: typec: tcpm: Pass down negotiated rev to update retry count
Badhri Jagan Sridharan [Wed, 2 Dec 2020 03:17:33 +0000 (19:17 -0800)]
usb: typec: tcpm: Pass down negotiated rev to update retry count

nRetryCount was updated from 3 to 2 between PD2.0 and PD3.0 spec.
nRetryCount in "Table 6-34 Counter parameters" of the PD 2.0
spec is set to 3, whereas, nRetryCount in "Table 6-59 Counter
parameters" is set to 2.

Pass down negotiated rev in pd_transmit so that low level chip
drivers can update the retry count accordingly before attempting
packet transmission.

This helps in passing "TEST.PD.PORT.ALL.02" of the
"Power Delivery Merged" test suite which was initially failing
with "The UUT did not retransmit the message nReryCount times"

In fusb302 & tcpci drivers, by default the driver sets the retry
count to 3 (Default for PD 2.0). Update this to 2,
if the negotiated rev is PD 3.0.

In wcove, since the retry count is intentionally set to max, leaving
it as is.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20201202031733.647808-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: typec: intel_pmc_mux: Use correct response message bits
Utkarsh Patel [Thu, 3 Dec 2020 22:08:13 +0000 (14:08 -0800)]
usb: typec: intel_pmc_mux: Use correct response message bits

When Intel PMC Mux agent driver receives the response message from PMC, it
checks for the same response bits for all the mux states.
Corrected it by checking correct response message bits, Bit 8 & 9 for the
SAFE Mode and Alternate Modes and Bit 16 & 17 for the Connect and
Disconnect Modes.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Utkarsh Patel <utkarsh.h.patel@intel.com>
Link: https://lore.kernel.org/r/20201203220813.16281-1-utkarsh.h.patel@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: ehci-omap: Fix PM disable depth umbalance in ehci_hcd_omap_probe
Zhang Qilong [Mon, 23 Nov 2020 14:57:19 +0000 (22:57 +0800)]
usb: ehci-omap: Fix PM disable depth umbalance in ehci_hcd_omap_probe

The pm_runtime_enable will decrement the power disable depth. Imbalance
depth will resulted in enabling runtime PM of device fails later.  Thus
a pairing decrement must be needed on the error handling path to keep it
balanced.

Fixes: 6c984b066d84b ("ARM: OMAP: USBHOST: Replace usbhs core driver APIs by Runtime pm APIs")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201123145719.1455849-1-zhangqilong3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoxhci: Give USB2 ports time to enter U3 in bus suspend
Li Jun [Tue, 8 Dec 2020 09:29:12 +0000 (11:29 +0200)]
xhci: Give USB2 ports time to enter U3 in bus suspend

If a USB2 device wakeup is not enabled/supported the link state may
still be in U0 in xhci_bus_suspend(), where it's then manually put
to suspended U3 state.

Just as with selective suspend the device needs time to enter U3
suspend before continuing with further suspend operations
(e.g. system suspend), otherwise we may enter system suspend with link
state in U0.

[commit message rewording -Mathias]

Cc: <stable@vger.kernel.org>
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20201208092912.1773650-6-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoxhci-pci: Allow host runtime PM as default for Intel Maple Ridge xHCI
Mika Westerberg [Tue, 8 Dec 2020 09:29:11 +0000 (11:29 +0200)]
xhci-pci: Allow host runtime PM as default for Intel Maple Ridge xHCI

Intel Maple Ridge is successor of Titan Ridge Thunderbolt controller. As
Titan Ridge this one also includes xHCI host controller. In order to
safe energy we should put it to low power state by default when idle.
For this reason allow host runtime PM for Maple Ridge.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20201208092912.1773650-5-mathias.nyman@linux.intel.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoxhci-pci: Allow host runtime PM as default for Intel Alpine Ridge LP
Hans de Goede [Tue, 8 Dec 2020 09:29:10 +0000 (11:29 +0200)]
xhci-pci: Allow host runtime PM as default for Intel Alpine Ridge LP

The xHCI controller on Alpine Ridge LP keeps the whole Thunderbolt
controller awake if the host controller is not allowed to sleep.
This is the case even if no USB devices are connected to the host.

Add the Intel Alpine Ridge LP product-id to the list of product-ids
for which we allow runtime PM by default.

Fixes: 2815ef7fe4d4 ("xhci-pci: allow host runtime PM as default for Intel Alpine and Titan Ridge")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20201208092912.1773650-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: xhci: Use temporary buffer to consolidate SG
Tejas Joglekar [Tue, 8 Dec 2020 09:29:09 +0000 (11:29 +0200)]
usb: xhci: Use temporary buffer to consolidate SG

The Synopsys xHC has an internal TRB cache of size TRB_CACHE_SIZE for
each endpoint. The default value for TRB_CACHE_SIZE is 16 for SS and 8
for HS. The controller loads and updates the TRB cache from the transfer
ring in system memory whenever the driver issues a start transfer or
update transfer command.

For chained TRBs, the Synopsys xHC requires that the total amount of
bytes for all TRBs loaded in the TRB cache be greater than or equal to 1
MPS. Or the chain ends within the TRB cache (with a last TRB).

If this requirement is not met, the controller will not be able to send
or receive a packet and it will hang causing a driver timeout and error.

This can be a problem if a class driver queues SG requests with many
small-buffer entries. The XHCI driver will create a chained TRB for each
entry which may trigger this issue.

This patch adds logic to the XHCI driver to detect and prevent this from
happening.

For every (TRB_CACHE_SIZE - 2), we check the total buffer size of
the SG list and if the last window of (TRB_CACHE_SIZE - 2) SG list length
and we don't make up at least 1 MPS, we create a temporary buffer to
consolidate full SG list into the buffer.

We check at (TRB_CACHE_SIZE - 2) window because it is possible that there
would be a link and/or event data TRB that take up to 2 of the cache
entries.

We discovered this issue with devices on other platforms but have not
yet come across any device that triggers this on Linux. But it could be
a real problem now or in the future. All it takes is N number of small
chained TRBs. And other instances of the Synopsys IP may have smaller
values for the TRB_CACHE_SIZE which would exacerbate the problem.

Signed-off-by: Tejas Joglekar <joglekar@synopsys.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20201208092912.1773650-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK
Tejas Joglekar [Tue, 8 Dec 2020 09:29:08 +0000 (11:29 +0200)]
usb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK

This commit uses the private data passed by parent device
to set the quirk for Synopsys xHC. This patch fixes the
SNPS xHC hang issue when the data is scattered across
small buffers which does not make atleast MPS size for
given TRB cache size of SNPS xHC.

Signed-off-by: Tejas Joglekar <joglekar@synopsys.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20201208092912.1773650-2-mathias.nyman@linux.intel.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoUSB: legotower: fix logical error in recent commit
Alan Stern [Tue, 8 Dec 2020 16:30:42 +0000 (11:30 -0500)]
USB: legotower: fix logical error in recent commit

Commit d9f0d82f06c6 ("USB: legousbtower: use usb_control_msg_recv()")
contained an elementary logical error.  The check of the return code
from the new usb_control_msg_recv() function was inverted.

Reported-and-tested-by: syzbot+9be25235b7a69b24d117@syzkaller.appspotmail.com
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20201208163042.GD1298255@rowland.harvard.edu
Fixes: d9f0d82f06c6 ("USB: legousbtower: use usb_control_msg_recv()")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoMerge tag 'thunderbolt-for-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel...
Greg Kroah-Hartman [Tue, 8 Dec 2020 12:41:45 +0000 (13:41 +0100)]
Merge tag 'thunderbolt-for-v5.11-rc1' of git://git./linux/kernel/git/westeri/thunderbolt into usb-next

Mika writes:

thunderbolt: Changes for v5.11 merge window

This includes following Thunderbolt/USB4 changes for v5.11 merge window:

  * DMA traffic test driver

  * USB4 router NVM upgrade improvements

  * USB4 router operations proxy implementation available in the recent
    Intel Connection Manager firmwares

  * Support for Intel Maple Ridge discrete Thunderbolt 4 controller

  * A couple of cleanups and minor improvements.

* tag 'thunderbolt-for-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt: (22 commits)
  thunderbolt: Add support for Intel Maple Ridge
  thunderbolt: Add USB4 router operation proxy for firmware connection manager
  thunderbolt: Move constants for USB4 router operations to tb_regs.h
  thunderbolt: Add connection manager specific hooks for USB4 router operations
  thunderbolt: Pass TX and RX data directly to usb4_switch_op()
  thunderbolt: Pass metadata directly to usb4_switch_op()
  thunderbolt: Perform USB4 router NVM upgrade in two phases
  thunderbolt: Return -ENOTCONN when ERR_CONN is received
  thunderbolt: Keep the parent runtime resumed for a while on device disconnect
  thunderbolt: Log adapter numbers in decimal in path activation/deactivation
  thunderbolt: Log which connection manager implementation is used
  thunderbolt: Move max_boot_acl field to correct place in struct icm
  MAINTAINERS: Add Isaac as maintainer of Thunderbolt DMA traffic test driver
  thunderbolt: Add DMA traffic test driver
  thunderbolt: Add support for end-to-end flow control
  thunderbolt: Make it possible to allocate one directional DMA tunnel
  thunderbolt: Create debugfs directory automatically for services
  thunderbolt: Add functions for enabling and disabling lane bonding on XDomain
  thunderbolt: Add link_speed and link_width to XDomain
  thunderbolt: Create XDomain devices for loops back to the host
  ...

3 years agoUSB: add RESET_RESUME quirk for Snapscan 1212
Oliver Neukum [Mon, 7 Dec 2020 13:03:23 +0000 (14:03 +0100)]
USB: add RESET_RESUME quirk for Snapscan 1212

I got reports that some models of this old scanner need
this when using runtime PM.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201207130323.23857-1-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: typec: tps6598x: Export some power supply properties
Guido Günther [Sat, 5 Dec 2020 11:13:26 +0000 (12:13 +0100)]
usb: typec: tps6598x: Export some power supply properties

This allows downstream supplies and userspace to detect
whether external power is supplied.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Link: https://lore.kernel.org/r/2c8e81d9da9ff05b065f66edba915edd11f74065.1607166657.git.agx@sigxcpu.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: typec: tps6598x: Select USB_ROLE_SWITCH and REGMAP_I2C
Guido Günther [Sat, 5 Dec 2020 11:13:25 +0000 (12:13 +0100)]
usb: typec: tps6598x: Select USB_ROLE_SWITCH and REGMAP_I2C

This is more in line with what tcpm does and will be needed
to avoid recursive dependency like

 > drivers/power/supply/Kconfig:2:error: recursive dependency detected!
   drivers/power/supply/Kconfig:2: symbol POWER_SUPPLY is selected by TYPEC_TPS6598X
   drivers/usb/typec/Kconfig:64: symbol TYPEC_TPS6598X depends on REGMAP_I2C
   drivers/base/regmap/Kconfig:19: symbol REGMAP_I2C is selected by CHARGER_ADP5061
   drivers/power/supply/Kconfig:93: symbol CHARGER_ADP5061 depends on POWER_SUPPLY
   For a resolution refer to Documentation/kbuild/kconfig-language.rst
   subsection "Kconfig recursive dependency limitations"

when selecting POWER_SUPPLY.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Link: https://lore.kernel.org/r/6d11417c42d82caf66e08af160397959eb7d0d60.1607166657.git.agx@sigxcpu.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: mtu3: fix memory corruption in mtu3_debugfs_regset()
Dan Carpenter [Thu, 3 Dec 2020 08:41:13 +0000 (11:41 +0300)]
usb: mtu3: fix memory corruption in mtu3_debugfs_regset()

This code is using the wrong sizeof() so it does not allocate enough
memory.  It allocates 32 bytes but 72 are required.  That will lead to
memory corruption.

Fixes: ae07809255d3 ("usb: mtu3: add debugfs interface files")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X8ikqc4Mo2/0G72j@mwanda
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoUSB: dummy-hcd: Fix uninitialized array use in init()
Bui Quang Minh [Fri, 4 Dec 2020 06:24:49 +0000 (06:24 +0000)]
USB: dummy-hcd: Fix uninitialized array use in init()

This error path

err_add_pdata:
for (i = 0; i < mod_data.num; i++)
kfree(dum[i]);

can be triggered when not all dum's elements are initialized.

Fix this by initializing all dum's elements to NULL.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Link: https://lore.kernel.org/r/1607063090-3426-1-git-send-email-minhquangbui99@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: chipidea: ci_hdrc_imx: Pass DISABLE_DEVICE_STREAMING flag to imx6ul
Fabio Estevam [Mon, 7 Dec 2020 02:09:09 +0000 (10:09 +0800)]
usb: chipidea: ci_hdrc_imx: Pass DISABLE_DEVICE_STREAMING flag to imx6ul

According to the i.MX6UL Errata document:
https://www.nxp.com/docs/en/errata/IMX6ULCE.pdf

ERR007881 also affects i.MX6UL, so pass the
CI_HDRC_DISABLE_DEVICE_STREAMING flag to workaround the issue.

Fixes: 52fe568e5d71 ("usb: chipidea: imx: add imx6ul usb support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Link: https://lore.kernel.org/r/20201207020909.22483-2-peter.chen@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoUSB: core: drop pipe-type check from new control-message helpers
Johan Hovold [Fri, 4 Dec 2020 08:51:08 +0000 (09:51 +0100)]
USB: core: drop pipe-type check from new control-message helpers

The new control-message helpers include a pipe-type check which is
almost completely redundant.

Control messages are generally sent to the default pipe which always
exists and is of the correct type since its endpoint representation is
created by USB core as part of enumeration for all devices.

There is currently only one instance of a driver in the tree which use
a control endpoint other than endpoint 0 (and it does not use the new
helpers).

Drivers should be testing for the existence of their resources at probe
rather than at runtime, but to catch drivers failing to do so USB core
already does a sanity check on URB submission and triggers a WARN().
Having the same sanity check done in the helper only suppresses the
warning without allowing us to find and fix the drivers.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20201204085110.20055-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoMerge 5.10-rc7 into usb-next
Greg Kroah-Hartman [Mon, 7 Dec 2020 09:20:51 +0000 (10:20 +0100)]
Merge 5.10-rc7 into usb-next

We want the USB fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoLinux 5.10-rc7
Linus Torvalds [Sun, 6 Dec 2020 22:25:12 +0000 (14:25 -0800)]
Linux 5.10-rc7

3 years agoMerge tag 'char-misc-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregk...
Linus Torvalds [Sun, 6 Dec 2020 19:48:17 +0000 (11:48 -0800)]
Merge tag 'char-misc-5.10-rc7' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small driver fixes, and one "large" revert, for
  5.10-rc7.

  They include:

   - revert mei patch from 5.10-rc1 that was using a reserved userspace
     value. It will be resubmitted once the proper id has been assigned
     by the virtio people.

   - habanalabs fixes found by the fall-through audit from Gustavo

   - speakup driver fixes for reported issues

   - fpga config build fix for reported issue.

  All of these except the revert have been in linux-next with no
  reported issues. The revert is "clean" and just removes a
  previously-added driver, so no real issue there"

* tag 'char-misc-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  Revert "mei: virtio: virtualization frontend driver"
  fpga: Specify HAS_IOMEM dependency for FPGA_DFL
  habanalabs: put devices before driver removal
  habanalabs: free host huge va_range if not used
  speakup: Reject setting the speakup line discipline outside of speakup

3 years agoMerge tag 'tty-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sun, 6 Dec 2020 19:43:50 +0000 (11:43 -0800)]
Merge tag 'tty-5.10-rc7' of git://git./linux/kernel/git/gregkh/tty

Pull tty fixes from Greg KH:
 "Here are two tty core fixes for 5.10-rc7.

  They resolve some reported locking issues in the tty core. While they
  have not been in a released linux-next yet, they have passed all of
  the 0-day bot testing as well as the submitter's testing"

* tag 'tty-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: Fix ->session locking
  tty: Fix ->pgrp locking in tiocspgrp()

3 years agoMerge tag 'usb-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sun, 6 Dec 2020 19:38:36 +0000 (11:38 -0800)]
Merge tag 'usb-5.10-rc7' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 5.10-rc7 that resolve a number of
  reported issues, and add some new device ids.

  Nothing major here, but these solve some problems that people were
  having with the 5.10-rc tree:

   - reverts for USB storage dma settings that broke working devices

   - thunderbolt use-after-free fix

   - cdns3 driver fixes

   - gadget driver userspace copy fix

   - new device ids

  All of these except for the reverts have been in linux-next with no
  reported issues. The reverts are "clean" and were tested by Hans, as
  well as passing the 0-day tests"

* tag 'usb-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: gadget: f_fs: Use local copy of descriptors for userspace copy
  usb: ohci-omap: Fix descriptor conversion
  Revert "usb-storage: fix sdev->host->dma_dev"
  Revert "uas: fix sdev->host->dma_dev"
  Revert "uas: bump hw_max_sectors to 2048 blocks for SS or faster drives"
  USB: serial: kl5kusb105: fix memleak on open
  USB: serial: ch341: sort device-id entries
  USB: serial: ch341: add new Product ID for CH341A
  USB: serial: option: fix Quectel BG96 matching
  usb: cdns3: core: fix goto label for error path
  usb: cdns3: gadget: clear trb->length as zero after preparing every trb
  usb: cdns3: Fix hardware based role switch
  USB: serial: option: add support for Thales Cinterion EXS82
  USB: serial: option: add Fibocom NL668 variants
  thunderbolt: Fix use-after-free in remove_unplugged_switch()

3 years agoMerge tag 'x86-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 6 Dec 2020 19:22:39 +0000 (11:22 -0800)]
Merge tag 'x86-urgent-2020-12-06' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:
 "A set of fixes for x86:

   - Make the AMD L3 QoS code and data priorization enable/disable
     mechanism work correctly.

     The control bit was only set/cleared on one of the CPUs in a L3
     domain, but it has to be modified on all CPUs in the domain. The
     initial documentation was not clear about this, but the updated one
     from Oct 2020 spells it out.

   - Fix an off by one in the UV platform detection code which causes
     the UV hubs to be identified wrongly.

     The chip revisions start at 1 not at 0.

   - Fix a long standing bug in the evaluation of prefixes in the
     uprobes code which fails to handle repeated prefixes properly.

     The aggregate size of the prefixes can be larger than the bytes
     array but the code blindly iterated over the aggregate size beyond
     the array boundary. Add a macro to handle this case properly and
     use it at the affected places"

* tag 'x86-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sev-es: Use new for_each_insn_prefix() macro to loop over prefixes bytes
  x86/insn-eval: Use new for_each_insn_prefix() macro to loop over prefixes bytes
  x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes
  x86/platform/uv: Fix UV4 hub revision adjustment
  x86/resctrl: Fix AMD L3 QOS CDP enable/disable

3 years agoMerge tag 'perf-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 6 Dec 2020 19:20:18 +0000 (11:20 -0800)]
Merge tag 'perf-urgent-2020-12-06' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
 "Two fixes for performance monitoring on X86:

   - Add recursion protection to another callchain invoked from
     x86_pmu_stop() which can recurse back into x86_pmu_stop(). The
     first attempt to fix this missed this extra code path.

   - Use the already filtered status variable to check for PEBS counter
     overflow bits and not the unfiltered full status read from
     IA32_PERF_GLOBAL_STATUS which can have unrelated bits check which
     would be evaluated incorrectly"

* tag 'perf-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Check PEBS status correctly
  perf/x86/intel: Fix a warning on x86_pmu_stop() with large PEBS

3 years agoMerge tag 'irq-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 6 Dec 2020 19:15:55 +0000 (11:15 -0800)]
Merge tag 'irq-urgent-2020-12-06' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "A set of updates for the interrupt subsystem:

   - Make multiqueue devices which use the managed interrupt affinity
     infrastructure work on PowerPC/Pseries. PowerPC does not use the
     generic infrastructure for setting up PCI/MSI interrupts and the
     multiqueue changes failed to update the legacy PCI/MSI
     infrastructure. Make this work by passing the affinity setup
     information down to the mapping and allocation functions.

   - Move Jason Cooper from MAINTAINERS to CREDITS as his mail is
     bouncing and he's not reachable. We hope all is well with him and
     say thanks for his work over the years"

* tag 'irq-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  powerpc/pseries: Pass MSI affinity to irq_create_mapping()
  genirq/irqdomain: Add an irq_create_mapping_affinity() function
  MAINTAINERS: Move Jason Cooper to CREDITS

3 years agoMerge tag 'locking-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 6 Dec 2020 19:11:32 +0000 (11:11 -0800)]
Merge tag 'locking-urgent-2020-12-06' of git://git./linux/kernel/git/tip/tip

Pull intel_idle build fix from Thomas Gleixner:
 "A tiny build fix for a recent change in the intel_idle driver which
  missed a CONFIG dependency and broke the build for certain
  configurations"

* tag 'locking-urgent-2020-12-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  intel_idle: Build fix

3 years agoMerge tag 'kbuild-fixes-v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 6 Dec 2020 18:31:39 +0000 (10:31 -0800)]
Merge tag 'kbuild-fixes-v5.10-2' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Move -Wcast-align to W=3, which tends to be false-positive and there
   is no tree-wide solution.

 - Pass -fmacro-prefix-map to KBUILD_CPPFLAGS because it is a
   preprocessor option and makes sense for .S files as well.

 - Disable -gdwarf-2 for Clang's integrated assembler to avoid warnings.

 - Disable --orphan-handling=warn for LLD 10.0.1 to avoid warnings.

 - Fix undesirable line breaks in *.mod files.

* tag 'kbuild-fixes-v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: avoid split lines in .mod files
  kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1
  kbuild: Hoist '--orphan-handling' into Kconfig
  Kbuild: do not emit debug info for assembly with LLVM_IAS=1
  kbuild: use -fmacro-prefix-map for .S sources
  Makefile.extrawarn: move -Wcast-align to W=3

3 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sun, 6 Dec 2020 18:20:59 +0000 (10:20 -0800)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "12 patches.

  Subsystems affected by this patch series: mm (memcg, zsmalloc, swap,
  mailmap, selftests, pagecache, hugetlb, pagemap), lib, and coredump"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm/mmap.c: fix mmap return value when vma is merged after call_mmap()
  hugetlb_cgroup: fix offline of hugetlb cgroup with reservations
  mm/filemap: add static for function __add_to_page_cache_locked
  userfaultfd: selftests: fix SIGSEGV if huge mmap fails
  tools/testing/selftests/vm: fix build error
  mailmap: add two more addresses of Uwe Kleine-König
  mm/swapfile: do not sleep with a spin lock held
  mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING
  mm: list_lru: set shrinker map bit when child nr_items is not zero
  mm: memcg/slab: fix obj_cgroup_charge() return value handling
  coredump: fix core_pattern parse error
  zlib: export S390 symbols for zlib modules

3 years agomm/mmap.c: fix mmap return value when vma is merged after call_mmap()
Liu Zixian [Sun, 6 Dec 2020 06:15:15 +0000 (22:15 -0800)]
mm/mmap.c: fix mmap return value when vma is merged after call_mmap()

On success, mmap should return the begin address of newly mapped area,
but patch "mm: mmap: merge vma after call_mmap() if possible" set
vm_start of newly merged vma to return value addr.  Users of mmap will
get wrong address if vma is merged after call_mmap().  We fix this by
moving the assignment to addr before merging vma.

We have a driver which changes vm_flags, and this bug is found by our
testcases.

Fixes: d70cec898324 ("mm: mmap: merge vma after call_mmap() if possible")
Signed-off-by: Liu Zixian <liuzixian4@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Hongxiang Lou <louhongxiang@huawei.com>
Cc: Hu Shiyuan <hushiyuan@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Link: https://lkml.kernel.org/r/20201203085350.22624-1-liuzixian4@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agohugetlb_cgroup: fix offline of hugetlb cgroup with reservations
Mike Kravetz [Sun, 6 Dec 2020 06:15:12 +0000 (22:15 -0800)]
hugetlb_cgroup: fix offline of hugetlb cgroup with reservations

Adrian Moreno was ruuning a kubernetes 1.19 + containerd/docker workload
using hugetlbfs.  In this environment the issue is reproduced by:

 - Start a simple pod that uses the recently added HugePages medium
   feature (pod yaml attached)

 - Start a DPDK app. It doesn't need to run successfully (as in transfer
   packets) nor interact with real hardware. It seems just initializing
   the EAL layer (which handles hugepage reservation and locking) is
   enough to trigger the issue

 - Delete the Pod (or let it "Complete").

This would result in a kworker thread going into a tight loop (top output):

   1425 root      20   0       0      0      0 R  99.7   0.0   5:22.45 kworker/28:7+cgroup_destroy

'perf top -g' reports:

  -   63.28%     0.01%  [kernel]                    [k] worker_thread
     - 49.97% worker_thread
        - 52.64% process_one_work
           - 62.08% css_killed_work_fn
              - hugetlb_cgroup_css_offline
                   41.52% _raw_spin_lock
                 - 2.82% _cond_resched
                      rcu_all_qs
                   2.66% PageHuge
        - 0.57% schedule
           - 0.57% __schedule

We are spinning in the do-while loop in hugetlb_cgroup_css_offline.
Worse yet, we are holding the master cgroup lock (cgroup_mutex) while
infinitely spinning.  Little else can be done on the system as the
cgroup_mutex can not be acquired.

Do note that the issue can be reproduced by simply offlining a hugetlb
cgroup containing pages with reservation counts.

The loop in hugetlb_cgroup_css_offline is moving page counts from the
cgroup being offlined to the parent cgroup.  This is done for each
hstate, and is repeated until hugetlb_cgroup_have_usage returns false.
The routine moving counts (hugetlb_cgroup_move_parent) is only moving
'usage' counts.  The routine hugetlb_cgroup_have_usage is checking for
both 'usage' and 'reservation' counts.  Discussion about what to do with
reservation counts when reparenting was discussed here:

https://lore.kernel.org/linux-kselftest/CAHS8izMFAYTgxym-Hzb_JmkTK1N_S9tGN71uS6MFV+R7swYu5A@mail.gmail.com/

The decision was made to leave a zombie cgroup for with reservation
counts.  Unfortunately, the code checking reservation counts was
incorrectly added to hugetlb_cgroup_have_usage.

To fix the issue, simply remove the check for reservation counts.  While
fixing this issue, a related bug in hugetlb_cgroup_css_offline was
noticed.  The hstate index is not reinitialized each time through the
do-while loop.  Fix this as well.

Fixes: 1adc4d419aa2 ("hugetlb_cgroup: add interface for charge/uncharge hugetlb reservations")
Reported-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Adrian Moreno <amorenoz@redhat.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201203220242.158165-1-mike.kravetz@oracle.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm/filemap: add static for function __add_to_page_cache_locked
Alex Shi [Sun, 6 Dec 2020 06:15:09 +0000 (22:15 -0800)]
mm/filemap: add static for function __add_to_page_cache_locked

  mm/filemap.c:830:14: warning: no previous prototype for `__add_to_page_cache_locked' [-Wmissing-prototypes]

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Link: https://lkml.kernel.org/r/1604661895-5495-1-git-send-email-alex.shi@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agouserfaultfd: selftests: fix SIGSEGV if huge mmap fails
Axel Rasmussen [Sun, 6 Dec 2020 06:15:05 +0000 (22:15 -0800)]
userfaultfd: selftests: fix SIGSEGV if huge mmap fails

The error handling in hugetlb_allocate_area() was incorrect for the
hugetlb_shared test case.

Previously the behavior was:

- mmap a hugetlb area
  - If this fails, set the pointer to NULL, and carry on
- mmap an alias of the same hugetlb fd
  - If this fails, munmap the original area

If the original mmap failed, it's likely the second one did too.  If
both failed, we'd blindly try to munmap a NULL pointer, causing a
SIGSEGV.  Instead, "goto fail" so we return before trying to mmap the
alias.

This issue can be hit "in real life" by forgetting to set
/proc/sys/vm/nr_hugepages (leaving it at 0), and then trying to run the
hugetlb_shared test.

Another small improvement is, when the original mmap fails, don't just
print "it failed": perror(), so we can see *why*.  :)

Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Joe Perches <joe@perches.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Alan Gilbert <dgilbert@redhat.com>
Link: https://lkml.kernel.org/r/20201204203443.2714693-1-axelrasmussen@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agotools/testing/selftests/vm: fix build error
Xingxing Su [Sun, 6 Dec 2020 06:15:02 +0000 (22:15 -0800)]
tools/testing/selftests/vm: fix build error

Only x86 and PowerPC implement the pkey-xxx.h, and an error was reported
when compiling protection_keys.c.

Add a Arch judgment to compile "protection_keys" in the Makefile.

If other arch implement this, add the arch name to the Makefile.
eg:
    ifneq (,$(findstring $(ARCH),powerpc mips ... ))

Following build errors:

    pkey-helpers.h:93:2: error: #error Architecture not supported
     #error Architecture not supported
    pkey-helpers.h:96:20: error: `PKEY_DISABLE_ACCESS' undeclared
     #define PKEY_MASK (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE)
                        ^
    protection_keys.c:218:45: error: `PKEY_DISABLE_WRITE' undeclared
     pkey_assert(flags & (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE));
                                                ^

Signed-off-by: Xingxing Su <suxingxing@loongson.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: Mina Almasry <almasrymina@google.com>
Link: https://lkml.kernel.org/r/1606826876-30656-1-git-send-email-suxingxing@loongson.cn
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomailmap: add two more addresses of Uwe Kleine-König
Uwe Kleine-König [Sun, 6 Dec 2020 06:14:58 +0000 (22:14 -0800)]
mailmap: add two more addresses of Uwe Kleine-König

This fixes attribution for the commits (among others)

 - d4097456cd1d ("video/framebuffer: move the probe func into
   .devinit.text in Blackfin LCD driver")

 - 0312e024d6cd ("mfd: mc13xxx: Add support for mc34708")

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20201127213358.3440830-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm/swapfile: do not sleep with a spin lock held
Qian Cai [Sun, 6 Dec 2020 06:14:55 +0000 (22:14 -0800)]
mm/swapfile: do not sleep with a spin lock held

We can't call kvfree() with a spin lock held, so defer it.  Fixes a
might_sleep() runtime warning.

Fixes: 873d7bcfd066 ("mm/swapfile.c: use kvzalloc for swap_info_struct allocation")
Signed-off-by: Qian Cai <qcai@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201202151549.10350-1-qcai@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING
Minchan Kim [Sun, 6 Dec 2020 06:14:51 +0000 (22:14 -0800)]
mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING

While I was doing zram testing, I found sometimes decompression failed
since the compression buffer was corrupted.  With investigation, I found
below commit calls cond_resched unconditionally so it could make a
problem in atomic context if the task is reschedule.

  BUG: sleeping function called from invalid context at mm/vmalloc.c:108
  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 946, name: memhog
  3 locks held by memhog/946:
   #0: ffff9d01d4b193e8 (&mm->mmap_lock#2){++++}-{4:4}, at: __mm_populate+0x103/0x160
   #1: ffffffffa3d53de0 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa98/0x1160
   #2: ffff9d01d56b8110 (&zspage->lock){.+.+}-{3:3}, at: zs_map_object+0x8e/0x1f0
  CPU: 0 PID: 946 Comm: memhog Not tainted 5.9.3-00011-gc5bfc0287345-dirty #316
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1 04/01/2014
  Call Trace:
    unmap_kernel_range_noflush+0x2eb/0x350
    unmap_kernel_range+0x14/0x30
    zs_unmap_object+0xd5/0xe0
    zram_bvec_rw.isra.0+0x38c/0x8e0
    zram_rw_page+0x90/0x101
    bdev_write_page+0x92/0xe0
    __swap_writepage+0x94/0x4a0
    pageout+0xe3/0x3a0
    shrink_page_list+0xb94/0xd60
    shrink_inactive_list+0x158/0x460

We can fix this by removing the ZSMALLOC_PGTABLE_MAPPING feature (which
contains the offending calling code) from zsmalloc.

Even though this option showed some amount improvement(e.g., 30%) in
some arm32 platforms, it has been headache to maintain since it have
abused APIs[1](e.g., unmap_kernel_range in atomic context).

Since we are approaching to deprecate 32bit machines and already made
the config option available for only builtin build since v5.8, lastly it
has been not default option in zsmalloc, it's time to drop the option
for better maintenance.

[1] http://lore.kernel.org/linux-mm/20201105170249.387069-1-minchan@kernel.org

Fixes: e47110e90584 ("mm/vunmap: add cond_resched() in vunmap_pmd_range")
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Harish Sriram <harish@linux.ibm.com>
Cc: Uladzislau Rezki <urezki@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201117202916.GA3856507@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm: list_lru: set shrinker map bit when child nr_items is not zero
Yang Shi [Sun, 6 Dec 2020 06:14:48 +0000 (22:14 -0800)]
mm: list_lru: set shrinker map bit when child nr_items is not zero

When investigating a slab cache bloat problem, significant amount of
negative dentry cache was seen, but confusingly they neither got shrunk
by reclaimer (the host has very tight memory) nor be shrunk by dropping
cache.  The vmcore shows there are over 14M negative dentry objects on
lru, but tracing result shows they were even not scanned at all.

Further investigation shows the memcg's vfs shrinker_map bit is not set.
So the reclaimer or dropping cache just skip calling vfs shrinker.  So
we have to reboot the hosts to get the memory back.

I didn't manage to come up with a reproducer in test environment, and
the problem can't be reproduced after rebooting.  But it seems there is
race between shrinker map bit clear and reparenting by code inspection.
The hypothesis is elaborated as below.

The memcg hierarchy on our production environment looks like:

                root
               /    \
          system   user

The main workloads are running under user slice's children, and it
creates and removes memcg frequently.  So reparenting happens very often
under user slice, but no task is under user slice directly.

So with the frequent reparenting and tight memory pressure, the below
hypothetical race condition may happen:

       CPU A                            CPU B
reparent
    dst->nr_items == 0
                                 shrinker:
                                     total_objects == 0
    add src->nr_items to dst
    set_bit
                                     return SHRINK_EMPTY
                                     clear_bit
child memcg offline
    replace child's kmemcg_id with
    parent's (in memcg_offline_kmem())
                                  list_lru_del() between shrinker runs
                                     see parent's kmemcg_id
                                     dec dst->nr_items
reparent again
    dst->nr_items may go negative
    due to concurrent list_lru_del()

                                 The second run of shrinker:
                                     read nr_items without any
                                     synchronization, so it may
                                     see intermediate negative
                                     nr_items then total_objects
                                     may return 0 coincidently

                                     keep the bit cleared
    dst->nr_items != 0
    skip set_bit
    add scr->nr_item to dst

After this point dst->nr_item may never go zero, so reparenting will not
set shrinker_map bit anymore.  And since there is no task under user
slice directly, so no new object will be added to its lru to set the
shrinker map bit either.  That bit is kept cleared forever.

How does list_lru_del() race with reparenting? It is because reparenting
replaces children's kmemcg_id to parent's without protecting from
nlru->lock, so list_lru_del() may see parent's kmemcg_id but actually
deleting items from child's lru, but dec'ing parent's nr_items, so the
parent's nr_items may go negative as commit 2788cf0c401c ("memcg:
reparent list_lrus and free kmemcg_id on css offline") says.

Since it is impossible that dst->nr_items goes negative and
src->nr_items goes zero at the same time, so it seems we could set the
shrinker map bit iff src->nr_items != 0.  We could synchronize
list_lru_count_one() and reparenting with nlru->lock, but it seems
checking src->nr_items in reparenting is the simplest and avoids lock
contention.

Fixes: fae91d6d8be5 ("mm/list_lru.c: set bit in memcg shrinker bitmap on first list_lru item appearance")
Suggested-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: <stable@vger.kernel.org> [4.19]
Link: https://lkml.kernel.org/r/20201202171749.264354-1-shy828301@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomm: memcg/slab: fix obj_cgroup_charge() return value handling
Roman Gushchin [Sun, 6 Dec 2020 06:14:45 +0000 (22:14 -0800)]
mm: memcg/slab: fix obj_cgroup_charge() return value handling

Commit 10befea91b61 ("mm: memcg/slab: use a single set of kmem_caches
for all allocations") introduced a regression into the handling of the
obj_cgroup_charge() return value.  If a non-zero value is returned
(indicating of exceeding one of memory.max limits), the allocation
should fail, instead of falling back to non-accounted mode.

To make the code more readable, move memcg_slab_pre_alloc_hook() and
memcg_slab_post_alloc_hook() calling conditions into bodies of these
hooks.

Fixes: 10befea91b61 ("mm: memcg/slab: use a single set of kmem_caches for all allocations")
Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201127161828.GD840171@carbon.dhcp.thefacebook.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agocoredump: fix core_pattern parse error
Menglong Dong [Sun, 6 Dec 2020 06:14:42 +0000 (22:14 -0800)]
coredump: fix core_pattern parse error

'format_corename()' will splite 'core_pattern' on spaces when it is in
pipe mode, and take helper_argv[0] as the path to usermode executable.
It works fine in most cases.

However, if there is a space between '|' and '/file/path', such as
'| /usr/lib/systemd/systemd-coredump %P %u %g', then helper_argv[0] will
be parsed as '', and users will get a 'Core dump to | disabled'.

It is not friendly to users, as the pattern above was valid previously.
Fix this by ignoring the spaces between '|' and '/file/path'.

Fixes: 315c69261dd3 ("coredump: split pipe command whitespace before expanding template")
Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Wise <pabs3@bonedaddy.net>
Cc: Jakub Wilk <jwilk@jwilk.net> [https://bugs.debian.org/924398]
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/5fb62870.1c69fb81.8ef5d.af76@mx.google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agozlib: export S390 symbols for zlib modules
Randy Dunlap [Sun, 6 Dec 2020 06:14:38 +0000 (22:14 -0800)]
zlib: export S390 symbols for zlib modules

Fix build errors when ZLIB_INFLATE=m and ZLIB_DEFLATE=m and ZLIB_DFLTCC=y
by exporting the 2 needed symbols in dfltcc_inflate.c.

Fixes these build errors:

  ERROR: modpost: "dfltcc_inflate" [lib/zlib_inflate/zlib_inflate.ko] undefined!
  ERROR: modpost: "dfltcc_can_inflate" [lib/zlib_inflate/zlib_inflate.ko] undefined!

Fixes: 126196100063 ("lib/zlib: add s390 hardware support for kernel zlib_inflate")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Link: https://lkml.kernel.org/r/20201123191712.4882-1-rdunlap@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agokbuild: avoid split lines in .mod files
Masahiro Yamada [Thu, 3 Dec 2020 17:55:51 +0000 (02:55 +0900)]
kbuild: avoid split lines in .mod files

"xargs echo" is not a safe way to remove line breaks because the input
may exceed the command line limit and xargs may break it up into
multiple invocations of echo. This should never happen because
scripts/gen_autoksyms.sh expects all undefined symbols are placed in
the second line of .mod files.

One possible way is to replace "xargs echo" with
"sed ':x;N;$!bx;s/\n/ /g'" or something, but I rewrote the code by
using awk because it is more readable.

This issue was reported by Sami Tolvanen; in his Clang LTO patch set,
$(multi-used-m) is no longer an ELF object, but a thin archive that
contains LLVM bitcode files. llvm-nm prints out symbols for each
archive member separately, which results a lot of dupications, in some
places, beyond the system-defined limit.

This problem must be fixed irrespective of LTO, and we must ensure
zero possibility of having this issue.

Link: https://lkml.org/lkml/2020/12/1/1658
Reported-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
3 years agoRevert "mei: virtio: virtualization frontend driver"
Michael S. Tsirkin [Sat, 5 Dec 2020 19:38:46 +0000 (14:38 -0500)]
Revert "mei: virtio: virtualization frontend driver"

This reverts commit d162219c655c8cf8003128a13840d6c1e183fb80.

The device uses a VIRTIO device ID out of a not-for-production range.
Releasing Linux using an ID out of this range will make it conflict with
development setups. An official request to reserve an ID for an MEI
device is yet to be submitted to the virtio TC, thus there's no chance
it will be reserved and fixed in time before the next release.

Once requested it usually takes 2-3 weeks to land in the spec, which
means the device can be supported with the official ID in the next Linux
version if contributors act quickly.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Cc: Alexander Usyskin <alexander.usyskin@intel.com>
Cc: Wang Yu <yu1.wang@intel.com>
Cc: Liu Shuo <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20201205193625.469773-1-mst@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agox86/sev-es: Use new for_each_insn_prefix() macro to loop over prefixes bytes
Masami Hiramatsu [Thu, 3 Dec 2020 04:51:01 +0000 (13:51 +0900)]
x86/sev-es: Use new for_each_insn_prefix() macro to loop over prefixes bytes

Since insn.prefixes.nbytes can be bigger than the size of
insn.prefixes.bytes[] when a prefix is repeated, the proper
check must be:

  insn.prefixes.bytes[i] != 0 and i < 4

instead of using insn.prefixes.nbytes. Use the new
for_each_insn_prefix() macro which does it correctly.

Debugged by Kees Cook <keescook@chromium.org>.

 [ bp: Massage commit message. ]

Fixes: 25189d08e516 ("x86/sev-es: Add support for handling IOIO exceptions")
Reported-by: syzbot+9b64b619f10f19d19a7c@syzkaller.appspotmail.com
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/160697106089.3146288.2052422845039649176.stgit@devnote2
3 years agox86/insn-eval: Use new for_each_insn_prefix() macro to loop over prefixes bytes
Masami Hiramatsu [Thu, 3 Dec 2020 04:50:50 +0000 (13:50 +0900)]
x86/insn-eval: Use new for_each_insn_prefix() macro to loop over prefixes bytes

Since insn.prefixes.nbytes can be bigger than the size of
insn.prefixes.bytes[] when a prefix is repeated, the proper check must
be

  insn.prefixes.bytes[i] != 0 and i < 4

instead of using insn.prefixes.nbytes. Use the new
for_each_insn_prefix() macro which does it correctly.

Debugged by Kees Cook <keescook@chromium.org>.

 [ bp: Massage commit message. ]

Fixes: 32d0b95300db ("x86/insn-eval: Add utility functions to get segment selector")
Reported-by: syzbot+9b64b619f10f19d19a7c@syzkaller.appspotmail.com
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/160697104969.3146288.16329307586428270032.stgit@devnote2
3 years agox86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes
Masami Hiramatsu [Thu, 3 Dec 2020 04:50:37 +0000 (13:50 +0900)]
x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes

Since insn.prefixes.nbytes can be bigger than the size of
insn.prefixes.bytes[] when a prefix is repeated, the proper check must
be

  insn.prefixes.bytes[i] != 0 and i < 4

instead of using insn.prefixes.nbytes.

Introduce a for_each_insn_prefix() macro for this purpose. Debugged by
Kees Cook <keescook@chromium.org>.

 [ bp: Massage commit message, sync with the respective header in tools/
   and drop "we". ]

Fixes: 2b1444983508 ("uprobes, mm, x86: Add the ability to install and remove uprobes breakpoints")
Reported-by: syzbot+9b64b619f10f19d19a7c@syzkaller.appspotmail.com
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/160697103739.3146288.7437620795200799020.stgit@devnote2
3 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sun, 6 Dec 2020 00:16:34 +0000 (16:16 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:
 "A fix for 'RETRIGEN' handling in Atmel touch controllers that was
  causing lost interrupts on systems using edge-triggered interrupts, a
  quirk for i8042 driver, and a couple more fixes."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: atmel_mxt_ts - fix lost interrupts
  Input: xpad - support Ardwiino Controllers
  Input: i8042 - add ByteSpeed touchpad to noloop table
  Input: i8042 - fix error return code in i8042_setup_aux()
  Input: soc_button_array - add missing include

3 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sat, 5 Dec 2020 23:27:22 +0000 (15:27 -0800)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Some more I2C driver updates. IMX updates are a tad bigger, but not
  exceptionally big"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mlxbf: Fix the return check of devm_ioremap and ioremap
  i2c: mlxbf: select CONFIG_I2C_SLAVE
  i2c: imx: Don't generate STOP condition if arbitration has been lost
  i2c: imx: Check for I2SR_IAL after every byte
  i2c: imx: Fix reset of I2SR_IAL flag
  i2c: qcom: Fix IRQ error misassignement
  i2c: qup: Fix error return code in qup_i2c_bam_schedule_desc()

3 years agoMerge tag 'block-5.10-2020-12-05' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 5 Dec 2020 22:45:30 +0000 (14:45 -0800)]
Merge tag 'block-5.10-2020-12-05' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Single fix for an issue with chunk_sectors and stacked devices"

* tag 'block-5.10-2020-12-05' of git://git.kernel.dk/linux-block:
  block: use gcd() to fix chunk_sectors limit stacking

3 years agoMerge tag 'io_uring-5.10-2020-12-05' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 5 Dec 2020 22:39:59 +0000 (14:39 -0800)]
Merge tag 'io_uring-5.10-2020-12-05' of git://git.kernel.dk/linux-block

Pull io_uring fix from Jens Axboe:
 "Just a small fix this time, for an issue with 32-bit compat apps and
  buffer selection with recvmsg"

* tag 'io_uring-5.10-2020-12-05' of git://git.kernel.dk/linux-block:
  io_uring: fix recvmsg setup with compat buf-select

3 years agoMerge tag 'powerpc-5.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sat, 5 Dec 2020 19:16:21 +0000 (11:16 -0800)]
Merge tag 'powerpc-5.10-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Some more powerpc fixes for 5.10:

   - Three commits fixing possible missed TLB invalidations for
     multi-threaded processes when CPUs are hotplugged in and out.

   - A fix for a host crash triggerable by host userspace (qemu) in KVM
     on Power9.

   - A fix for a host crash in machine check handling when running HPT
     guests on a HPT host.

   - One commit fixing potential missed TLB invalidations when using the
     hash MMU on Power9 or later.

   - A regression fix for machines with CPUs on node 0 but no memory.

  Thanks to Aneesh Kumar K.V, Cédric Le Goater, Greg Kurz, Milan
  Mohanty, Milton Miller, Nicholas Piggin, Paul Mackerras, and Srikar
  Dronamraju"

* tag 'powerpc-5.10-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s/powernv: Fix memory corruption when saving SLB entries on MCE
  KVM: PPC: Book3S HV: XIVE: Fix vCPU id sanity check
  powerpc/numa: Fix a regression on memoryless node 0
  powerpc/64s: Trim offlined CPUs from mm_cpumasks
  kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling
  powerpc/64s/pseries: Fix hash tlbiel_all_isa300 for guest kernels
  powerpc/64s: Fix hash ISA v3.0 TLBIEL instruction generation

3 years agoMerge tag '5.10-rc6-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 5 Dec 2020 19:09:07 +0000 (11:09 -0800)]
Merge tag '5.10-rc6-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Three smb3 fixes (two for stable) fixing

   - a null pointer issue in a DFS error path

   - a problem with excessive padding when mounted with "idsfromsid"
     causing owner fields to get corrupted

   - a more recent problem with compounded reparse point query found in
     testing to the Linux kernel server"

* tag '5.10-rc6-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: refactor create_sd_buf() and and avoid corrupting the buffer
  cifs: add NULL check for ses->tcon_ipc
  smb3: set COMPOUND_FID to FileID field of subsequent compound request

3 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 5 Dec 2020 18:59:21 +0000 (10:59 -0800)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Four small fixes in two drivers.

  The mpt3sas fixes are all problems with timeout under unusual
  conditions, and the storvsc is a missed incoming packet validation
  and a missed error return"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: mpt3sas: Increase IOCInit request timeout to 30s
  scsi: mpt3sas: Fix ioctl timeout
  scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback()
  scsi: storvsc: Fix error return in storvsc_probe()

3 years agoMerge tag 'for-5.10/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 5 Dec 2020 18:51:25 +0000 (10:51 -0800)]
Merge tag 'for-5.10/dm-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull fix for device mapper fixes from Mike Snitzer:
 "Apologies for the glaring bug I introduced with my previous pull
  request!

  Fix incorrect branching at top of blk_max_size_offset()"

* tag 'for-5.10/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  block: fix incorrect branching in blk_max_size_offset()

3 years agoi2c: mlxbf: Fix the return check of devm_ioremap and ioremap
Wang Xiaojun [Thu, 3 Dec 2020 01:46:47 +0000 (20:46 -0500)]
i2c: mlxbf: Fix the return check of devm_ioremap and ioremap

devm_ioremap and ioremap may return NULL which cannot be checked
by IS_ERR.

Signed-off-by: Wang Xiaojun <wangxiaojun11@huawei.com>
Reported-by: Hulk Robot <hulkci@huawei.com>
Acked-by: Khalil Blaiech <kblaiech@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agoi2c: mlxbf: select CONFIG_I2C_SLAVE
Arnd Bergmann [Thu, 3 Dec 2020 22:32:50 +0000 (23:32 +0100)]
i2c: mlxbf: select CONFIG_I2C_SLAVE

If this is not enabled, the interfaces used in this driver do not work:

drivers/i2c/busses/i2c-mlxbf.c:1888:3: error: implicit declaration of function 'i2c_slave_event' [-Werror,-Wimplicit-function-declaration]
                i2c_slave_event(slave, I2C_SLAVE_WRITE_REQUESTED, &value);
                ^
drivers/i2c/busses/i2c-mlxbf.c:1888:26: error: use of undeclared identifier 'I2C_SLAVE_WRITE_REQUESTED'
                i2c_slave_event(slave, I2C_SLAVE_WRITE_REQUESTED, &value);
                                       ^
drivers/i2c/busses/i2c-mlxbf.c:1890:32: error: use of undeclared identifier 'I2C_SLAVE_WRITE_RECEIVED'
                ret = i2c_slave_event(slave, I2C_SLAVE_WRITE_RECEIVED,
                                             ^
drivers/i2c/busses/i2c-mlxbf.c:1892:26: error: use of undeclared identifier 'I2C_SLAVE_STOP'
                i2c_slave_event(slave, I2C_SLAVE_STOP, &value);
                                       ^

Fixes: b5b5b32081cd ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Khalil Blaiech <kblaiech@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agoblock: fix incorrect branching in blk_max_size_offset()
Mike Snitzer [Fri, 4 Dec 2020 22:21:03 +0000 (17:21 -0500)]
block: fix incorrect branching in blk_max_size_offset()

If non-zero 'chunk_sectors' is passed in to blk_max_size_offset() that
override will be incorrectly ignored.

Old blk_max_size_offset() branching, prior to commit 3ee16db390b4,
must be used only if passed 'chunk_sectors' override is zero.

Fixes: 3ee16db390b4 ("dm: fix IO splitting")
Cc: stable@vger.kernel.org # 5.9
Reported-by: John Dorminy <jdorminy@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
3 years agoMerge tag 'for-5.10/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Fri, 4 Dec 2020 21:28:39 +0000 (13:28 -0800)]
Merge tag 'for-5.10/dm-fixes' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - Fix DM's bio splitting changes that were made during v5.9. This
   restores splitting in terms of varied per-target ti->max_io_len
   rather than use block core's single stacked 'chunk_sectors' limit.

 - Like DM crypt, update DM integrity to not use crypto drivers that
   have CRYPTO_ALG_ALLOCATES_MEMORY set.

 - Fix DM writecache target's argument parsing and status display.

 - Remove needless BUG() from dm writecache's persistent_memory_claim()

 - Remove old gcc workaround in DM cache target's block_div() for ARM
   link errors now that gcc >= 4.9 is required.

 - Fix RCU locking in dm_blk_report_zones and dm_dax_zero_page_range.

 - Remove old, and now frowned upon, BUG_ON(in_interrupt()) in
   dm_table_event().

 - Remove invalid sparse annotations from dm_prepare_ioctl() and
   dm_unprepare_ioctl().

* tag 'for-5.10/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm: remove invalid sparse __acquires and __releases annotations
  dm: fix double RCU unlock in dm_dax_zero_page_range() error path
  dm: fix IO splitting
  dm writecache: remove BUG() and fail gracefully instead
  dm table: Remove BUG_ON(in_interrupt())
  dm: fix bug with RCU locking in dm_blk_report_zones
  Revert "dm cache: fix arm link errors with inline"
  dm writecache: fix the maximum number of arguments
  dm writecache: advance the number of arguments when reporting max_age
  dm integrity: don't use drivers that have CRYPTO_ALG_ALLOCATES_MEMORY

3 years agodm: remove invalid sparse __acquires and __releases annotations
Mike Snitzer [Fri, 4 Dec 2020 20:25:18 +0000 (15:25 -0500)]
dm: remove invalid sparse __acquires and __releases annotations

Fixes sparse warnings:
drivers/md/dm.c:508:12: warning: context imbalance in 'dm_prepare_ioctl' - wrong count at exit
drivers/md/dm.c:543:13: warning: context imbalance in 'dm_unprepare_ioctl' - wrong count at exit

Fixes: 971888c46993f ("dm: hold DM table for duration of ioctl rather than use blkdev_get")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
3 years agodm: fix double RCU unlock in dm_dax_zero_page_range() error path
Mike Snitzer [Fri, 4 Dec 2020 20:19:27 +0000 (15:19 -0500)]
dm: fix double RCU unlock in dm_dax_zero_page_range() error path

Remove redundant dm_put_live_table() in dm_dax_zero_page_range() error
path to fix sparse warning:
drivers/md/dm.c:1208:9: warning: context imbalance in 'dm_dax_zero_page_range' - unexpected unlock

Fixes: cdf6cdcd3b99a ("dm,dax: Add dax zero_page_range operation")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
3 years agodm: fix IO splitting
Mike Snitzer [Mon, 30 Nov 2020 15:57:43 +0000 (10:57 -0500)]
dm: fix IO splitting

Commit 882ec4e609c1 ("dm table: stack 'chunk_sectors' limit to account
for target-specific splitting") caused a couple regressions:
1) Using lcm_not_zero() when stacking chunk_sectors was a bug because
   chunk_sectors must reflect the most limited of all devices in the
   IO stack.
2) DM targets that set max_io_len but that do _not_ provide an
   .iterate_devices method no longer had there IO split properly.

And commit 5091cdec56fa ("dm: change max_io_len() to use
blk_max_size_offset()") also caused a regression where DM no longer
supported varied (per target) IO splitting. The implication being the
potential for severely reduced performance for IO stacks that use a DM
target like dm-cache to hide performance limitations of a slower
device (e.g. one that requires 4K IO splitting).

Coming full circle: Fix all these issues by discontinuing stacking
chunk_sectors up using ti->max_io_len in dm_calculate_queue_limits(),
add optional chunk_sectors override argument to blk_max_size_offset()
and update DM's max_io_len() to pass ti->max_io_len to its
blk_max_size_offset() call.

Passing in an optional chunk_sectors override to blk_max_size_offset()
allows for code reuse of block's centralized calculation for max IO
size based on provided offset and split boundary.

Fixes: 882ec4e609c1 ("dm table: stack 'chunk_sectors' limit to account for target-specific splitting")
Fixes: 5091cdec56fa ("dm: change max_io_len() to use blk_max_size_offset()")
Cc: stable@vger.kernel.org
Reported-by: John Dorminy <jdorminy@redhat.com>
Reported-by: Bruce Johnston <bjohnsto@redhat.com>
Reported-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Reviewed-by: John Dorminy <jdorminy@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
3 years agoMerge tag 'drm-fixes-2020-12-04' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 4 Dec 2020 17:25:22 +0000 (09:25 -0800)]
Merge tag 'drm-fixes-2020-12-04' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "This week's regular fixes.

  i915 has fixes for a few races, use-after-free, and gpu hangs. Tegra
  just has some minor fixes that I didn't see much point in hanging on
  to. The nouveau fix is for all pre-nv50 cards and was reported a few
  times. Otherwise it's just some amdgpu, and a few misc fixes.

  Summary:

  amdgpu:
   - SMU11 manual fan fix
   - Renoir display clock fix
   - VCN3 dynamic powergating fix

  i915:
   - Program mocs:63 for cache eviction on gen9 (Chris)
   - Protect context lifetime with RCU (Chris)
   - Split the breadcrumb spinlock between global and contexts (Chris)
   - Retain default context state across shrinking (Venkata)
   - Limit frequency drop to RPe on parking (Chris)
   - Return earlier from intel_modeset_init() without display (Jani)
   - Defer initial modeset until after GGTT is initialized (Chris)

  nouveau:
   - pre-nv50 regression fix

  rockchip:
   - uninitialised LVDS property fix

  omap:
   - bridge fix

  panel:
   - race fix

  mxsfb:
   - fence sync fix
   - modifiers fix

  tegra:
   - idr init fix
   - sor fixes
   - output/of cleanup fix"

* tag 'drm-fixes-2020-12-04' of git://anongit.freedesktop.org/drm/drm: (22 commits)
  drm/amdgpu/vcn3.0: remove old DPG workaround
  drm/amdgpu/vcn3.0: stall DPG when WPTR/RPTR reset
  drm/amd/display: Init clock value by current vbios CLKs
  drm/amdgpu/pm/smu11: Fix fan set speed bug
  drm/i915/display: Defer initial modeset until after GGTT is initialised
  drm/i915/display: return earlier from intel_modeset_init() without display
  drm/i915/gt: Limit frequency drop to RPe on parking
  drm/i915/gt: Retain default context state across shrinking
  drm/i915/gt: Split the breadcrumb spinlock between global and contexts
  drm/i915/gt: Protect context lifetime with RCU
  drm/i915/gt: Program mocs:63 for cache eviction on gen9
  drm/omap: sdi: fix bridge enable/disable
  drm/panel: sony-acx565akm: Fix race condition in probe
  drm/rockchip: Avoid uninitialized use of endpoint id in LVDS
  drm/tegra: sor: Disable clocks on error in tegra_sor_init()
  drm/nouveau: make sure ret is initialized in nouveau_ttm_io_mem_reserve
  drm: mxsfb: Implement .format_mod_supported
  drm: mxsfb: fix fence synchronization
  drm/tegra: output: Do not put OF node twice
  drm/tegra: replace idr_init() by idr_init_base()
  ...

3 years agotty: Fix ->session locking
Jann Horn [Thu, 3 Dec 2020 01:25:05 +0000 (02:25 +0100)]
tty: Fix ->session locking

Currently, locking of ->session is very inconsistent; most places
protect it using the legacy tty mutex, but disassociate_ctty(),
__do_SAK(), tiocspgrp() and tiocgsid() don't.
Two of the writers hold the ctrl_lock (because they already need it for
->pgrp), but __proc_set_tty() doesn't do that yet.

On a PREEMPT=y system, an unprivileged user can theoretically abuse
this broken locking to read 4 bytes of freed memory via TIOCGSID if
tiocgsid() is preempted long enough at the right point. (Other things
might also go wrong, especially if root-only ioctls are involved; I'm
not sure about that.)

Change the locking on ->session such that:

 - tty_lock() is held by all writers: By making disassociate_ctty()
   hold it. This should be fine because the same lock can already be
   taken through the call to tty_vhangup_session().
   The tricky part is that we need to shorten the area covered by
   siglock to be able to take tty_lock() without ugly retry logic; as
   far as I can tell, this should be fine, since nothing in the
   signal_struct is touched in the `if (tty)` branch.
 - ctrl_lock is held by all writers: By changing __proc_set_tty() to
   hold the lock a little longer.
 - All readers that aren't holding tty_lock() hold ctrl_lock: By
   adding locking to tiocgsid() and __do_SAK(), and expanding the area
   covered by ctrl_lock in tiocspgrp().

Cc: stable@kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agotty: Fix ->pgrp locking in tiocspgrp()
Jann Horn [Thu, 3 Dec 2020 01:25:04 +0000 (02:25 +0100)]
tty: Fix ->pgrp locking in tiocspgrp()

tiocspgrp() takes two tty_struct pointers: One to the tty that userspace
passed to ioctl() (`tty`) and one to the TTY being changed (`real_tty`).
These pointers are different when ioctl() is called with a master fd.

To properly lock real_tty->pgrp, we must take real_tty->ctrl_lock.

This bug makes it possible for racing ioctl(TIOCSPGRP, ...) calls on
both sides of a PTY pair to corrupt the refcount of `struct pid`,
leading to use-after-free errors.

Fixes: 47f86834bbd4 ("redo locking of tty->pgrp")
CC: stable@kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: mtu3: mtu3_debug: remove an unused struct member
Dan Carpenter [Thu, 3 Dec 2020 08:41:35 +0000 (11:41 +0300)]
usb: mtu3: mtu3_debug: remove an unused struct member

The "nregs" member is not used.  The code uses the "regset.nregs"
struct member instead.

Acked-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X8ikv1QA3Do50D+R@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoUSB: core: return -EREMOTEIO on short usb_control_msg_recv()
Johan Hovold [Fri, 4 Dec 2020 08:51:10 +0000 (09:51 +0100)]
USB: core: return -EREMOTEIO on short usb_control_msg_recv()

Return -EREMOTEIO instead of -EINVAL on short control transfers when
using the new usb_control_msg_recv() helper.

EINVAL is used to report invalid arguments (e.g. to the helper) and
should not be used for unrelated errors.

Many driver currently return -EIO on short control transfers but since
host-controller drivers already use -EREMOTEIO for short transfers
whenever the URB_SHORT_NOT_OK flag is set, let's use that here as well.

This also allows usb_control_msg_recv() to eventually use
URB_SHORT_NOT_OK without changing the return value again.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20201204085110.20055-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoUSB: core: drop short-transfer check from usb_control_msg_send()
Johan Hovold [Fri, 4 Dec 2020 08:51:09 +0000 (09:51 +0100)]
USB: core: drop short-transfer check from usb_control_msg_send()

A failure to send a complete control message is always an error so
there's no need to check for short transfers in usb_control_msg_send().

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20201204085110.20055-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoUSB: apple-mfi-fastcharge: Fix use after free in probe
Dan Carpenter [Thu, 3 Dec 2020 08:42:10 +0000 (11:42 +0300)]
USB: apple-mfi-fastcharge: Fix use after free in probe

This code frees "mfi" and then derefences it on the next line to get
the error code.

Fixes: b0eec52fbe63 ("USB: apple-mfi-fastcharge: Fix kfree after failed kzalloc")
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X8ik4j8yJitVUyfU@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: gadget: f_fs: Use local copy of descriptors for userspace copy
Vamsi Krishna Samavedam [Mon, 30 Nov 2020 20:34:53 +0000 (12:34 -0800)]
usb: gadget: f_fs: Use local copy of descriptors for userspace copy

The function may be unbound causing the ffs_ep and its descriptors
to be freed while userspace is in the middle of an ioctl requesting
the same descriptors. Avoid dangling pointer reference by first
making a local copy of desctiptors before releasing the spinlock.

Fixes: c559a3534109 ("usb: gadget: f_fs: add ioctl returning ep descriptor")
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Vamsi Krishna Samavedam <vskrishn@codeaurora.org>
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201130203453.28154-1-jackp@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agousb: ohci-omap: Fix descriptor conversion
Linus Walleij [Mon, 30 Nov 2020 08:30:33 +0000 (09:30 +0100)]
usb: ohci-omap: Fix descriptor conversion

There were a bunch of issues with the patch converting the
OMAP1 OSK board to use descriptors for controlling the USB
host:

- The chip label was incorrect
- The GPIO offset was off-by-one
- The code should use sleeping accessors

This patch tries to fix all issues at the same time.

Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Fixes: 15d157e87443 ("usb: ohci-omap: Convert to use GPIO descriptors")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201130083033.29435-1-linus.walleij@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoRevert "usb-storage: fix sdev->host->dma_dev"
Greg Kroah-Hartman [Fri, 4 Dec 2020 15:01:23 +0000 (16:01 +0100)]
Revert "usb-storage: fix sdev->host->dma_dev"

This reverts commit 0154012f8018bba4d9971d1007c12ffd48539ddb as Hans
reports it causes problems on some systems.  Until a "real" fix for this
can be found, revert this change to get normal functionality back.

Link: https://lore.kernel.org/r/70ca74c2-4a80-e25b-eca9-a63a75516673@redhat.com
Cc: Tom Yan <tom.ty89@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoRevert "uas: fix sdev->host->dma_dev"
Greg Kroah-Hartman [Fri, 4 Dec 2020 15:00:34 +0000 (16:00 +0100)]
Revert "uas: fix sdev->host->dma_dev"

This reverts commit 558033c2828f832ab3b68c6f8b8710e0de6faef0 as Hans
reports it causes problems on some systems.  Until a "real" fix for this
can be found, revert this change to get normal functionality back.

Link: https://lore.kernel.org/r/70ca74c2-4a80-e25b-eca9-a63a75516673@redhat.com
Cc: Tom Yan <tom.ty89@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoRevert "uas: bump hw_max_sectors to 2048 blocks for SS or faster drives"
Greg Kroah-Hartman [Fri, 4 Dec 2020 14:59:27 +0000 (15:59 +0100)]
Revert "uas: bump hw_max_sectors to 2048 blocks for SS or faster drives"

This reverts commit 5df7ef7d32fec1d6d1c34dbec019b461a12ce870 as Hans
reports it causes problems on some systems.  Until a "real" fix for this
can be found, revert this change to get normal functionality back.

Link: https://lore.kernel.org/r/70ca74c2-4a80-e25b-eca9-a63a75516673@redhat.com
Cc: Tom Yan <tom.ty89@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3 years agoMerge tag 'usb-serial-5.10-rc7' of https://git.kernel.org/pub/scm/linux/kernel/git...
Greg Kroah-Hartman [Fri, 4 Dec 2020 12:15:55 +0000 (13:15 +0100)]
Merge tag 'usb-serial-5.10-rc7' of https://git./linux/kernel/git/johan/usb-serial into usb-linus

Johan writes:

USB-serial fixes for 5.10-rc7

Here's a fix for a regression in the option driver which has been
backported to the stable trees and fix for a small memory leak on open
in the kl5kusb105 driver.

Included are also various new device ids.

All but the memleak fix has been in linux-next and with no reported
issues.

* tag 'usb-serial-5.10-rc7' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial:
  USB: serial: kl5kusb105: fix memleak on open
  USB: serial: ch341: sort device-id entries
  USB: serial: ch341: add new Product ID for CH341A
  USB: serial: option: fix Quectel BG96 matching
  USB: serial: option: add support for Thales Cinterion EXS82
  USB: serial: option: add Fibocom NL668 variants

3 years agoUSB: serial: kl5kusb105: fix memleak on open
Johan Hovold [Fri, 4 Dec 2020 08:55:19 +0000 (09:55 +0100)]
USB: serial: kl5kusb105: fix memleak on open

Fix memory leak of control-message transfer buffer on successful open().

Fixes: 6774d5f53271 ("USB: serial: kl5kusb105: fix open error path")
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
3 years agoMerge tag 'drm-misc-fixes-2020-12-03' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 4 Dec 2020 01:53:43 +0000 (11:53 +1000)]
Merge tag 'drm-misc-fixes-2020-12-03' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

One bridge fix for OMAP, one for a race condition in a panel, two for
uninitialized variables in rockchip and nouveau, and two fixes for mxsfb
to fix a regression with modifiers and a fix for a fence synchronization
issue.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201203125943.h2ft2xoywunt5orl@gilmour
3 years agoMerge tag 'amd-drm-fixes-5.10-2020-12-02' of git://people.freedesktop.org/~agd5f...
Dave Airlie [Fri, 4 Dec 2020 01:48:37 +0000 (11:48 +1000)]
Merge tag 'amd-drm-fixes-5.10-2020-12-02' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

amd-drm-fixes-5.10-2020-12-02:

amdgpu:
- SMU11 manual fan fix
- Renoir display clock fix
- VCN3 dynamic powergating fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201203044815.41257-1-alexander.deucher@amd.com
3 years agoMerge tag 'drm-intel-fixes-2020-12-03' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 4 Dec 2020 01:45:37 +0000 (11:45 +1000)]
Merge tag 'drm-intel-fixes-2020-12-03' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

Fixes for GPU hang, null dereference, suspend-resume, power consumption, and use-after-free.

- Program mocs:63 for cache eviction on gen9 (Chris)
- Protect context lifetime with RCU (Chris)
- Split the breadcrumb spinlock between global and contexts (Chris)
- Retain default context state across shrinking (Venkata)
- Limit frequency drop to RPe on parking (Chris)
- Return earlier from intel_modeset_init() without display (Jani)
- Defer initial modeset until after GGTT is initialized (Chris)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201203134705.GA1575873@intel.com
3 years agocifs: refactor create_sd_buf() and and avoid corrupting the buffer
Ronnie Sahlberg [Mon, 30 Nov 2020 01:29:20 +0000 (11:29 +1000)]
cifs: refactor create_sd_buf() and and avoid corrupting the buffer

When mounting with "idsfromsid" mount option, Azure
corrupted the owner SIDs due to excessive padding
caused by placing the owner fields at the end of the
security descriptor on create.  Placing owners at the
front of the security descriptor (rather than the end)
is also safer, as the number of ACEs (that follow it)
are variable.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Suggested-by: Rohith Surabattula <rohiths@microsoft.com>
CC: Stable <stable@vger.kernel.org> # v5.8
Signed-off-by: Steve French <stfrench@microsoft.com>
3 years agocifs: add NULL check for ses->tcon_ipc
Aurelien Aptel [Thu, 3 Dec 2020 18:46:08 +0000 (19:46 +0100)]
cifs: add NULL check for ses->tcon_ipc

In some scenarios (DFS and BAD_NETWORK_NAME) set_root_set() can be
called with a NULL ses->tcon_ipc.

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
3 years agosmb3: set COMPOUND_FID to FileID field of subsequent compound request
Namjae Jeon [Thu, 3 Dec 2020 03:31:36 +0000 (12:31 +0900)]
smb3: set COMPOUND_FID to FileID field of subsequent compound request

For an operation compounded with an SMB2 CREATE request, client must set
COMPOUND_FID(0xFFFFFFFFFFFFFFFF) to FileID field of smb2 ioctl.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Fixes: 2e4564b31b645 ("smb3: add support stat of WSL reparse points for special file types")
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
3 years agoMerge tag 'net-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 3 Dec 2020 21:10:11 +0000 (13:10 -0800)]
Merge tag 'net-5.10-rc7' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Networking fixes for 5.10-rc7, including fixes from bpf, netfilter,
  wireless drivers, wireless mesh and can.

  Current release - regressions:

   - mt76: usb: fix crash on device removal

  Current release - always broken:

   - xsk: Fix umem cleanup from wrong context in socket destruct

  Previous release - regressions:

   - net: ip6_gre: set dev->hard_header_len when using header_ops

   - ipv4: Fix TOS mask in inet_rtm_getroute()

   - net, xsk: Avoid taking multiple skbuff references

  Previous release - always broken:

   - net/x25: prevent a couple of overflows

   - netfilter: ipset: prevent uninit-value in hash_ip6_add

   - geneve: pull IP header before ECN decapsulation

   - mpls: ensure LSE is pullable in TC and openvswitch paths

   - vxlan: respect needed_headroom of lower device

   - batman-adv: Consider fragmentation for needed packet headroom

   - can: drivers: don't count arbitration loss as an error

   - netfilter: bridge: reset skb->pkt_type after POST_ROUTING traversal

   - inet_ecn: Fix endianness of checksum update when setting ECT(1)

   - ibmvnic: fix various corner cases around reset handling

   - net/mlx5: fix rejecting unsupported Connect-X6DX SW steering

   - net/mlx5: Enforce HW TX csum offload with kTLS"

* tag 'net-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (62 commits)
  net/mlx5: DR, Proper handling of unsupported Connect-X6DX SW steering
  net/mlx5e: kTLS, Enforce HW TX csum offload with kTLS
  net: mlx5e: fix fs_tcp.c build when IPV6 is not enabled
  net/mlx5: Fix wrong address reclaim when command interface is down
  net/sched: act_mpls: ensure LSE is pullable before reading it
  net: openvswitch: ensure LSE is pullable before reading it
  net: skbuff: ensure LSE is pullable before decrementing the MPLS ttl
  net: mvpp2: Fix error return code in mvpp2_open()
  chelsio/chtls: fix a double free in chtls_setkey()
  rtw88: debug: Fix uninitialized memory in debugfs code
  vxlan: fix error return code in __vxlan_dev_create()
  net: pasemi: fix error return code in pasemi_mac_open()
  cxgb3: fix error return code in t3_sge_alloc_qset()
  net/x25: prevent a couple of overflows
  dpaa_eth: copy timestamp fields to new skb in A-050385 workaround
  net: ip6_gre: set dev->hard_header_len when using header_ops
  mt76: usb: fix crash on device removal
  iwlwifi: pcie: add some missing entries for AX210
  iwlwifi: pcie: invert values of NO_160 device config entries
  iwlwifi: pcie: add one missing entry for AX210
  ...

3 years agoMerge tag 's390-5.10-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Thu, 3 Dec 2020 19:58:26 +0000 (11:58 -0800)]
Merge tag 's390-5.10-6' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:
 "One commit is fixing lockdep irq state tracing which broke with -rc6.

  The other one fixes logical vs physical CPU address mixup in our PCI
  code.

  Summary:

   - fix lockdep irq state tracing

   - fix logical vs physical CPU address confusion in PCI code"

* tag 's390-5.10-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: fix irq state tracing
  s390/pci: fix CPU address in MSI for directed IRQ

3 years agoMerge tag '9p-for-5.10-rc7' of git://github.com/martinetd/linux
Linus Torvalds [Thu, 3 Dec 2020 19:47:13 +0000 (11:47 -0800)]
Merge tag '9p-for-5.10-rc7' of git://github.com/martinetd/linux

Pull 9p fixes from Dominique Martinet:
 "Restore splice functionality for 9p"

* tag '9p-for-5.10-rc7' of git://github.com/martinetd/linux:
  fs: 9p: add generic splice_write file operation
  fs: 9p: add generic splice_read file operations

3 years agoMerge branch 'mlx5-fixes-2020-12-01'
Jakub Kicinski [Thu, 3 Dec 2020 19:18:37 +0000 (11:18 -0800)]
Merge branch 'mlx5-fixes-2020-12-01'

Saeed Mahameed says:

====================
mlx5 fixes 2020-12-01

This series introduces some fixes to mlx5 driver.
====================

Link: https://lore.kernel.org/r/20201203043946.235385-1-saeedm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet/mlx5: DR, Proper handling of unsupported Connect-X6DX SW steering
Yevgeny Kliteynik [Thu, 3 Dec 2020 04:39:46 +0000 (20:39 -0800)]
net/mlx5: DR, Proper handling of unsupported Connect-X6DX SW steering

STEs format for Connect-X5 and Connect-X6DX different. Currently, on
Connext-X6DX the SW steering would break at some point when building STEs
w/o giving a proper error message. Fix this by checking the STE format of
the current device when initializing domain: add mlx5_ifc definitions for
Connect-X6DX SW steering, read FW capability to get the current format
version, and check this version when domain is being created.

Fixes: 26d688e33f88 ("net/mlx5: DR, Add Steering entry (STE) utilities")
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet/mlx5e: kTLS, Enforce HW TX csum offload with kTLS
Tariq Toukan [Thu, 3 Dec 2020 04:39:45 +0000 (20:39 -0800)]
net/mlx5e: kTLS, Enforce HW TX csum offload with kTLS

Checksum calculation cannot be done in SW for TX kTLS HW offloaded
packets.
Offload it to the device, disregard the declared state of the TX
csum offload feature.

Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support")
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: mlx5e: fix fs_tcp.c build when IPV6 is not enabled
Randy Dunlap [Thu, 3 Dec 2020 04:39:44 +0000 (20:39 -0800)]
net: mlx5e: fix fs_tcp.c build when IPV6 is not enabled

Fix build when CONFIG_IPV6 is not enabled by making a function
be built conditionally.

Fixes these build errors and warnings:

../drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c: In function 'accel_fs_tcp_set_ipv6_flow':
../include/net/sock.h:380:34: error: 'struct sock_common' has no member named 'skc_v6_daddr'; did you mean 'skc_daddr'?
  380 | #define sk_v6_daddr  __sk_common.skc_v6_daddr
      |                                  ^~~~~~~~~~~~
../drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c:55:14: note: in expansion of macro 'sk_v6_daddr'
   55 |         &sk->sk_v6_daddr, 16);
      |              ^~~~~~~~~~~
At top level:
../drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c:47:13: warning: 'accel_fs_tcp_set_ipv6_flow' defined but not used [-Wunused-function]
   47 | static void accel_fs_tcp_set_ipv6_flow(struct mlx5_flow_spec *spec, struct sock *sk)

Fixes: 5229a96e59ec ("net/mlx5e: Accel, Expose flow steering API for rules add/del")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet/mlx5: Fix wrong address reclaim when command interface is down
Eran Ben Elisha [Thu, 3 Dec 2020 04:39:43 +0000 (20:39 -0800)]
net/mlx5: Fix wrong address reclaim when command interface is down

When command interface is down, driver to reclaim all 4K page chucks that
were hold by the Firmeware. Fix a bug for 64K page size systems, where
driver repeatedly released only the first chunk of the page.

Define helper function to fill 4K chunks for a given Firmware pages.
Iterate over all unreleased Firmware pages and call the hepler per each.

Fixes: 5adff6a08862 ("net/mlx5: Fix incorrect page count when in internal error")
Signed-off-by: Eran Ben Elisha <eranbe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet/sched: act_mpls: ensure LSE is pullable before reading it
Davide Caratti [Thu, 3 Dec 2020 09:37:52 +0000 (10:37 +0100)]
net/sched: act_mpls: ensure LSE is pullable before reading it

when 'act_mpls' is used to mangle the LSE, the current value is read from
the packet dereferencing 4 bytes at mpls_hdr(): ensure that the label is
contained in the skb "linear" area.

Found by code inspection.

v2:
 - use MPLS_HLEN instead of sizeof(new_lse), thanks to Jakub Kicinski

Fixes: 2a2ea50870ba ("net: sched: add mpls manipulation actions to TC")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Guillaume Nault <gnault@redhat.com>
Link: https://lore.kernel.org/r/3243506cba43d14858f3bd21ee0994160e44d64a.1606987058.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: openvswitch: ensure LSE is pullable before reading it
Davide Caratti [Thu, 3 Dec 2020 09:46:06 +0000 (10:46 +0100)]
net: openvswitch: ensure LSE is pullable before reading it

when openvswitch is configured to mangle the LSE, the current value is
read from the packet dereferencing 4 bytes at mpls_hdr(): ensure that
the label is contained in the skb "linear" area.

Found by code inspection.

Fixes: d27cf5c59a12 ("net: core: add MPLS update core helper and use in OvS")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Link: https://lore.kernel.org/r/aa099f245d93218b84b5c056b67b6058ccf81a66.1606987185.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: skbuff: ensure LSE is pullable before decrementing the MPLS ttl
Davide Caratti [Thu, 3 Dec 2020 09:58:21 +0000 (10:58 +0100)]
net: skbuff: ensure LSE is pullable before decrementing the MPLS ttl

skb_mpls_dec_ttl() reads the LSE without ensuring that it is contained in
the skb "linear" area. Fix this calling pskb_may_pull() before reading the
current ttl.

Found by code inspection.

Fixes: 2a2ea50870ba ("net: sched: add mpls manipulation actions to TC")
Reported-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Link: https://lore.kernel.org/r/53659f28be8bc336c113b5254dc637cc76bbae91.1606987074.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge tag 'wireless-drivers-2020-12-03' of git://git.kernel.org/pub/scm/linux/kernel...
Jakub Kicinski [Thu, 3 Dec 2020 18:59:28 +0000 (10:59 -0800)]
Merge tag 'wireless-drivers-2020-12-03' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for v5.10

Second, and most likely final, set of fixes for v5.10. Small fixes and
PCI id addtions.

iwlwifi
 * PCI id additions
mt76
 * fix a kernel crash during device removal
rtw88
 * fix uninitialized memory in debugfs code

* tag 'wireless-drivers-2020-12-03' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers:
  rtw88: debug: Fix uninitialized memory in debugfs code
  mt76: usb: fix crash on device removal
  iwlwifi: pcie: add some missing entries for AX210
  iwlwifi: pcie: invert values of NO_160 device config entries
  iwlwifi: pcie: add one missing entry for AX210
  iwlwifi: update MAINTAINERS entry
====================

Link: https://lore.kernel.org/r/20201203183408.EE88AC43461@smtp.codeaurora.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: mvpp2: Fix error return code in mvpp2_open()
Wang Hai [Thu, 3 Dec 2020 14:18:06 +0000 (22:18 +0800)]
net: mvpp2: Fix error return code in mvpp2_open()

Fix to return negative error code -ENOENT from invalid configuration
error handling case instead of 0, as done elsewhere in this function.

Fixes: 4bb043262878 ("net: mvpp2: phylink support")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20201203141806.37966-1-wanghai38@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agochelsio/chtls: fix a double free in chtls_setkey()
Dan Carpenter [Thu, 3 Dec 2020 08:44:31 +0000 (11:44 +0300)]
chelsio/chtls: fix a double free in chtls_setkey()

The "skb" is freed by the transmit code in cxgb4_ofld_send() and we
shouldn't use it again.  But in the current code, if we hit an error
later on in the function then the clean up code will call kfree_skb(skb)
and so it causes a double free.

Set the "skb" to NULL and that makes the kfree_skb() a no-op.

Fixes: d25f2f71f653 ("crypto: chtls - Program the TLS session Key")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X8ilb6PtBRLWiSHp@mwanda
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agouapi: fix statx attribute value overlap for DAX & MOUNT_ROOT
Eric Sandeen [Tue, 1 Dec 2020 23:21:40 +0000 (17:21 -0600)]
uapi: fix statx attribute value overlap for DAX & MOUNT_ROOT

STATX_ATTR_MOUNT_ROOT and STATX_ATTR_DAX got merged with the same value,
so one of them needs fixing.  Move STATX_ATTR_DAX.

While we're in here, clarify the value-matching scheme for some of the
attributes, and explain why the value for DAX does not match.

Fixes: 80340fe3605c ("statx: add mount_root")
Fixes: 712b2698e4c0 ("fs/stat: Define DAX statx attribute")
Link: https://lore.kernel.org/linux-fsdevel/7027520f-7c79-087e-1d00-743bdefa1a1e@redhat.com/
Link: https://lore.kernel.org/lkml/20201202214629.1563760-1-ira.weiny@intel.com/
Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: <stable@vger.kernel.org> # 5.8
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agopwm: sl28cpld: fix getting driver data in pwm callbacks
Uwe Kleine-König [Thu, 3 Dec 2020 08:41:42 +0000 (09:41 +0100)]
pwm: sl28cpld: fix getting driver data in pwm callbacks

Currently .get_state() and .apply() use dev_get_drvdata() on the struct
device related to the pwm chip.  This only works after .probe() called
platform_set_drvdata() which in this driver happens only after
pwmchip_add() and so comes possibly too late.

Instead of setting the driver data earlier use the traditional
container_of approach as this way the driver data is conceptually and
computational nearer.

Fixes: 9db33d221efc ("pwm: Add support for sl28cpld PWM controller")
Tested-by: Michael Walle <michael@walle.cc>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agolib/syscall: fix syscall registers retrieval on 32-bit platforms
Willy Tarreau [Mon, 30 Nov 2020 07:36:48 +0000 (08:36 +0100)]
lib/syscall: fix syscall registers retrieval on 32-bit platforms

Lilith >_> and Claudio Bozzato of Cisco Talos security team reported
that collect_syscall() improperly casts the syscall registers to 64-bit
values leaking the uninitialized last 24 bytes on 32-bit platforms, that
are visible in /proc/self/syscall.

The cause is that info->data.args are u64 while syscall_get_arguments()
uses longs, as hinted by the bogus pointer cast in the function.

Let's just proceed like the other call places, by retrieving the
registers into an array of longs before assigning them to the caller's
array.  This was successfully tested on x86_64, i386 and ppc32.

Reference: CVE-2020-28588, TALOS-2020-1211
Fixes: 631b7abacd02 ("ptrace: Remove maxargs from task_current_syscall()")
Cc: Greg KH <greg@kroah.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Michael Ellerman <mpe@ellerman.id.au> (ppc32)
Signed-off-by: Willy Tarreau <w@1wt.eu>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>