platform/kernel/linux-rpi.git
5 years agonet: dsa: bcm_sf2: Fix driver removal
Florian Fainelli [Sun, 3 Nov 2019 03:17:39 +0000 (20:17 -0700)]
net: dsa: bcm_sf2: Fix driver removal

With the DSA core doing the call to dsa_port_disable() we do not need to
do that within the driver itself. This could cause an use after free
since past dsa_unregister_switch() we should not be accessing any
dsa_switch internal structures.

Fixes: 0394a63acfe2 ("net: dsa: enable and disable all ports")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: sched: prevent duplicate flower rules from tcf_proto destroy race
John Hurley [Sat, 2 Nov 2019 14:17:47 +0000 (14:17 +0000)]
net: sched: prevent duplicate flower rules from tcf_proto destroy race

When a new filter is added to cls_api, the function
tcf_chain_tp_insert_unique() looks up the protocol/priority/chain to
determine if the tcf_proto is duplicated in the chain's hashtable. It then
creates a new entry or continues with an existing one. In cls_flower, this
allows the function fl_ht_insert_unque to determine if a filter is a
duplicate and reject appropriately, meaning that the duplicate will not be
passed to drivers via the offload hooks. However, when a tcf_proto is
destroyed it is removed from its chain before a hardware remove hook is
hit. This can lead to a race whereby the driver has not received the
remove message but duplicate flows can be accepted. This, in turn, can
lead to the offload driver receiving incorrect duplicate flows and out of
order add/delete messages.

Prevent duplicates by utilising an approach suggested by Vlad Buslov. A
hash table per block stores each unique chain/protocol/prio being
destroyed. This entry is only removed when the full destroy (and hardware
offload) has completed. If a new flow is being added with the same
identiers as a tc_proto being detroyed, then the add request is replayed
until the destroy is complete.

Fixes: 8b64678e0af8 ("net: sched: refactor tp insert/delete for concurrent execution")
Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reported-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: Use the correct style for SPDX License Identifier
Nishad Kamdar [Sat, 2 Nov 2019 11:44:42 +0000 (17:14 +0530)]
net: hns3: Use the correct style for SPDX License Identifier

This patch corrects the SPDX License Identifier style in
header files related to Hisilicon network devices. For C header files
Documentation/process/license-rules.rst mandates C-like comments
(opposed to C source files where C++ style should be used)

Changes made by using a script provided by Joe Perches here:
https://lkml.org/lkml/2019/2/7/46.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobonding: fix state transition issue in link monitoring
Jay Vosburgh [Sat, 2 Nov 2019 04:56:42 +0000 (21:56 -0700)]
bonding: fix state transition issue in link monitoring

Since de77ecd4ef02 ("bonding: improve link-status update in
mii-monitoring"), the bonding driver has utilized two separate variables
to indicate the next link state a particular slave should transition to.
Each is used to communicate to a different portion of the link state
change commit logic; one to the bond_miimon_commit function itself, and
another to the state transition logic.

Unfortunately, the two variables can become unsynchronized,
resulting in incorrect link state transitions within bonding.  This can
cause slaves to become stuck in an incorrect link state until a
subsequent carrier state transition.

The issue occurs when a special case in bond_slave_netdev_event
sets slave->link directly to BOND_LINK_FAIL.  On the next pass through
bond_miimon_inspect after the slave goes carrier up, the BOND_LINK_FAIL
case will set the proposed next state (link_new_state) to BOND_LINK_UP,
but the new_link to BOND_LINK_DOWN.  The setting of the final link state
from new_link comes after that from link_new_state, and so the slave
will end up incorrectly in _DOWN state.

Resolve this by combining the two variables into one.

Reported-by: Aleksei Zakharov <zakharov.a.g@yandex.ru>
Reported-by: Sha Zhang <zhangsha.zhang@huawei.com>
Cc: Mahesh Bandewar <maheshb@google.com>
Fixes: de77ecd4ef02 ("bonding: improve link-status update in mii-monitoring")
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Wed, 6 Nov 2019 01:38:21 +0000 (17:38 -0800)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2019-11-02

The following pull-request contains BPF updates for your *net* tree.

We've added 6 non-merge commits during the last 6 day(s) which contain
a total of 8 files changed, 35 insertions(+), 9 deletions(-).

The main changes are:

1) Fix ppc BPF JIT's tail call implementation by performing a second pass
   to gather a stable JIT context before opcode emission, from Eric Dumazet.

2) Fix build of BPF samples sys_perf_event_open() usage to compiled out
   unavailable test_attr__{enabled,open} checks. Also fix potential overflows
   in bpf_map_{area_alloc,charge_init} on 32 bit archs, from Björn Töpel.

3) Fix narrow loads of bpf_sysctl context fields with offset > 0 on big endian
   archs like s390x and also improve the test coverage, from Ilya Leoshkevich.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotaprio: fix panic while hw offload sched list swap
Ivan Khoronzhuk [Fri, 1 Nov 2019 23:28:28 +0000 (01:28 +0200)]
taprio: fix panic while hw offload sched list swap

Don't swap oper and admin schedules too early, it's not correct and
causes crash.

Steps to reproduce:

1)
tc qdisc replace dev eth0 parent root handle 100 taprio \
    num_tc 3 \
    map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 \
    queues 1@0 1@1 1@2 \
    base-time $SOME_BASE_TIME \
    sched-entry S 01 80000 \
    sched-entry S 02 15000 \
    sched-entry S 04 40000 \
    flags 2

2)
tc qdisc replace dev eth0 parent root handle 100 taprio \
    base-time $SOME_BASE_TIME \
    sched-entry S 01 90000 \
    sched-entry S 02 20000 \
    sched-entry S 04 40000 \
    flags 2

3)
tc qdisc replace dev eth0 parent root handle 100 taprio \
    base-time $SOME_BASE_TIME \
    sched-entry S 01 150000 \
    sched-entry S 02 200000 \
    sched-entry S 04 40000 \
    flags 2

Do 2 3 2 .. steps  more times if not happens and observe:

[  305.832319] Unable to handle kernel write to read-only memory at
virtual address ffff0000087ce7f0
[  305.910887] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
[  305.919306] Hardware name: Texas Instruments AM654 Base Board (DT)

[...]

[  306.017119] x1 : ffff800848031d88 x0 : ffff800848031d80
[  306.022422] Call trace:
[  306.024866]  taprio_free_sched_cb+0x4c/0x98
[  306.029040]  rcu_process_callbacks+0x25c/0x410
[  306.033476]  __do_softirq+0x10c/0x208
[  306.037132]  irq_exit+0xb8/0xc8
[  306.040267]  __handle_domain_irq+0x64/0xb8
[  306.044352]  gic_handle_irq+0x7c/0x178
[  306.048092]  el1_irq+0xb0/0x128
[  306.051227]  arch_cpu_idle+0x10/0x18
[  306.054795]  do_idle+0x120/0x138
[  306.058015]  cpu_startup_entry+0x20/0x28
[  306.061931]  rest_init+0xcc/0xd8
[  306.065154]  start_kernel+0x3bc/0x3e4
[  306.068810] Code: f2fbd5b7 f2fbd5b6 d503201f f9400422 (f9000662)
[  306.074900] ---[ end trace 96c8e2284a9d9d6e ]---
[  306.079507] Kernel panic - not syncing: Fatal exception in interrupt
[  306.085847] SMP: stopping secondary CPUs
[  306.089765] Kernel Offset: disabled

Try to explain one of the possible crash cases:

The "real" admin list is assigned when admin_sched is set to
new_admin, it happens after "swap", that assigns to oper_sched NULL.
Thus if call qdisc show it can crash.

Farther, next second time, when sched list is updated, the admin_sched
is not NULL and becomes the oper_sched, previous oper_sched was NULL so
just skipped. But then admin_sched is assigned new_admin, but schedules
to free previous assigned admin_sched (that already became oper_sched).

Farther, next third time, when sched list is updated,
while one more swap, oper_sched is not null, but it was happy to be
freed already (while prev. admin update), so while try to free
oper_sched the kernel panic happens at taprio_free_sched_cb().

So, move the "swap emulation" where it should be according to function
comment from code.

Fixes: 9c66d15646760e ("taprio: Add support for hardware offloading")
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'linux-can-fixes-for-5.4-20191105' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Tue, 5 Nov 2019 21:29:18 +0000 (13:29 -0800)]
Merge tag 'linux-can-fixes-for-5.4-20191105' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2019-11-05

this is a pull request of 33 patches for net/master.

In the first patch Wen Yang's patch adds a missing of_node_put() to CAN device
infrastructure.

Navid Emamdoost's patch for the gs_usb driver fixes a memory leak in the
gs_can_open() error path.

Johan Hovold provides two patches, one for the mcba_usb, the other for the
usb_8dev driver. Both fix a use-after-free after USB-disconnect.

Joakim Zhang's patch improves the flexcan driver, the ECC mechanism is now
completely disabled instead of masking the interrupts.

The next three patches all target the peak_usb driver. Stephane Grosjean's
patch fixes a potential out-of-sync while decoding packets, Johan Hovold's
patch fixes a slab info leak, Jeroen Hofstee's patch adds missing reporting of
bus off recovery events.

Followed by three patches for the c_can driver. Kurt Van Dijck's patch fixes
detection of potential missing status IRQs, Jeroen Hofstee's patches add a chip
reset on open and add missing reporting of bus off recovery events.

Appana Durga Kedareswara rao's patch for the xilinx driver fixes the flags
field initialization for axi CAN.

The next seven patches target the rx-offload helper, they are by me and Jeroen
Hofstee. The error handling in case of a queue overflow is fixed removing a
memory leak. Further the error handling in case of queue overflow and skb OOM
is cleaned up.

The next two patches are by me and target the flexcan and ti_hecc driver. In
case of a error during can_rx_offload_queue_sorted() the error counters in the
drivers are incremented.

Jeroen Hofstee provides 6 patches for the ti_hecc driver, which properly stop
the device in ifdown, improve the rx-offload support (which hit mainline in
v5.4-rc1), and add missing FIFO overflow and state change reporting.

The following four patches target the j1939 protocol. Colin Ian King's patch
fixes a memory leak in the j1939_sk_errqueue() handling. Three patches by
Oleksij Rempel fix a memory leak on socket release and fix the EOMA packet in
the transport protocol.

Timo Schlüßler's patch fixes a potential race condition in the mcp251x driver
on after suspend.

The last patch is by Yegor Yefremov and updates the SPDX-License-Identifier to
v3.0.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agocan: don't use deprecated license identifiers
Yegor Yefremov [Thu, 19 Sep 2019 13:53:04 +0000 (15:53 +0200)]
can: don't use deprecated license identifiers

The "GPL-2.0" license identifier changed to "GPL-2.0-only" in SPDX v3.0.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: mcp251x: mcp251x_restart_work_handler(): Fix potential force_quit race condition
Timo Schlüßler [Fri, 11 Oct 2019 13:38:19 +0000 (15:38 +0200)]
can: mcp251x: mcp251x_restart_work_handler(): Fix potential force_quit race condition

In mcp251x_restart_work_handler() the variable to stop the interrupt
handler (priv->force_quit) is reset after the chip is restarted and thus
a interrupt might occur.

This patch fixes the potential race condition by resetting force_quit
before enabling interrupts.

Signed-off-by: Timo Schlüßler <schluessler@krause.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: j1939: transport: j1939_xtp_rx_eoma_one(): Add sanity check for correct total...
Oleksij Rempel [Fri, 25 Oct 2019 13:04:13 +0000 (15:04 +0200)]
can: j1939: transport: j1939_xtp_rx_eoma_one(): Add sanity check for correct total message size

We were sending malformed EOMA with total message size set to 0. This
issue has been fixed in the previous patch.

In this patch a sanity check is added to the RX path and a error message
is displayed.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: j1939: transport: j1939_session_fresh_new(): make sure EOMA is send with the...
Oleksij Rempel [Fri, 25 Oct 2019 13:04:13 +0000 (15:04 +0200)]
can: j1939: transport: j1939_session_fresh_new(): make sure EOMA is send with the total message size set

We were sending malformed EOMA messageswith total message size set to 0.

This patch fixes the bug.

Reported-by: https://github.com/linux-can/can-utils/issues/159
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: j1939: fix memory leak if filters was set
Oleksij Rempel [Thu, 10 Oct 2019 10:50:31 +0000 (12:50 +0200)]
can: j1939: fix memory leak if filters was set

Filters array is coped from user space and linked to the j1939 socket.
On socket release this memory was not freed.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: j1939: fix resource leak of skb on error return paths
Colin Ian King [Wed, 18 Sep 2019 10:11:56 +0000 (11:11 +0100)]
can: j1939: fix resource leak of skb on error return paths

Currently the error return paths do not free skb and this results in a
memory leak. Fix this by freeing them before the return.

Addresses-Coverity: ("Resource leak")
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: ti_hecc: add missing state changes
Jeroen Hofstee [Tue, 24 Sep 2019 18:46:06 +0000 (18:46 +0000)]
can: ti_hecc: add missing state changes

While the ti_hecc has interrupts to report when the error counters increase
to a certain level and which change state it doesn't handle the case that
the error counters go down again, so the reported state can actually be
wrong. Since there is no interrupt for that, do update state based on the
error counters, when the state is not error active and goes down again.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: ti_hecc: properly report state changes
Jeroen Hofstee [Tue, 24 Sep 2019 18:46:03 +0000 (18:46 +0000)]
can: ti_hecc: properly report state changes

The HECC_CANES register handles the flags specially, it only updates
the flags after a one is written to them. Since the interrupt for
frame errors is not enabled an old error can hence been seen when a
state interrupt arrives. For example if the device is not connected
to the CAN-bus the error warning interrupt will have HECC_CANES
indicating there is no ack. The error passive interrupt thereafter
will have HECC_CANES flagging that there is a warning level. And if
thereafter there is a message successfully send HECC_CANES points to
an error passive event, while in reality it became error warning
again. In summary, the state is not always reported correctly.

So handle the state changes and frame errors separately. The state
changes are now based on the interrupt flags and handled directly
when they occur. The reporting of the frame errors is still done as
before, as a side effect of another interrupt.

note: the hecc_clear_bit will do a read, modify, write. So it will
not only clear the bit, but also reset all other bits being set as
a side affect, hence it is replaced with only clearing the flags.

note: The HECC_CANMC_CCR is no longer cleared in the state change
interrupt, it is completely unrelated.

And use net_ratelimit to make checkpatch happy.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: ti_hecc: add fifo overflow error reporting
Jeroen Hofstee [Tue, 24 Sep 2019 18:46:00 +0000 (18:46 +0000)]
can: ti_hecc: add fifo overflow error reporting

When the rx FIFO overflows the ti_hecc would silently drop them since
the overwrite protection is enabled for all mailboxes. So disable it for
the lowest priority mailbox and return a proper error value when receive
message lost is set. Drop the message itself in that case, since it
might be partially updated.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Acked-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: ti_hecc: release the mailbox a bit earlier
Jeroen Hofstee [Tue, 24 Sep 2019 18:45:49 +0000 (18:45 +0000)]
can: ti_hecc: release the mailbox a bit earlier

Release the mailbox after reading it, so it can be reused a bit earlier.
Since "can: rx-offload: continue on error" all pending message bits are
cleared directly, so remove clearing them in ti_hecc.

Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: ti_hecc: keep MIM and MD set
Jeroen Hofstee [Tue, 24 Sep 2019 18:45:56 +0000 (18:45 +0000)]
can: ti_hecc: keep MIM and MD set

The HECC_CANMIM is set in the xmit path and cleared in the interrupt.
Since this is done with a read, modify, write action the register might
end up with some more MIM enabled then intended, since it is not
protected. That doesn't matter at all, since the tx interrupt disables
the mailbox with HECC_CANME (while holding a spinlock). So lets just
always keep MIM set.

While at it, since the mailbox direction never changes, don't set it
every time a message is send, ti_hecc_reset() already sets them to tx.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: ti_hecc: ti_hecc_stop(): stop the CPK on down
Jeroen Hofstee [Tue, 24 Sep 2019 18:45:52 +0000 (18:45 +0000)]
can: ti_hecc: ti_hecc_stop(): stop the CPK on down

When the interface goes down, the CPK should no longer take an active
part in the CAN-bus communication, like sending acks and error frames.
So enable configuration mode in ti_hecc_stop, so the CPK is no longer
active.

When a transceiver switch is present the acks and errors don't make it
to the bus, but disabling the CPK then does prevent oddities, like
ti_hecc_reset() failing, since the CPK can become bus-off and starts
counting the 11 bit recessive bits, which seems to block the reset. It
can also cause invalid interrupts and disrupt the CAN-bus, since
transmission can be stopped in the middle of a message, by disabling the
tranceiver while the CPK is sending.

Since the CPK is disabled after normal power on, it is typically only
seen when the interface is restarted.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: ti_hecc: ti_hecc_error(): increase error counters if skb enqueueing via can_rx_o...
Marc Kleine-Budde [Mon, 15 Jul 2019 18:53:08 +0000 (20:53 +0200)]
can: ti_hecc: ti_hecc_error(): increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails

The call to can_rx_offload_queue_sorted() may fail and return an error
(in the current implementation due to resource shortage). The passed skb
is consumed.

This patch adds incrementing of the appropriate error counters to let
the device statistics reflect that there's a problem.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: flexcan: increase error counters if skb enqueueing via can_rx_offload_queue_sort...
Marc Kleine-Budde [Mon, 15 Jul 2019 18:53:08 +0000 (20:53 +0200)]
can: flexcan: increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails

The call to can_rx_offload_queue_sorted() may fail and return an error
(in the current implementation due to resource shortage). The passed skb
is consumed.

This patch adds incrementing of the appropriate error counters to let
the device statistics reflect that there's a problem.

Reported-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: rx-offload: can_rx_offload_irq_offload_fifo(): continue on error
Marc Kleine-Budde [Tue, 24 Sep 2019 18:45:38 +0000 (18:45 +0000)]
can: rx-offload: can_rx_offload_irq_offload_fifo(): continue on error

In case of a resource shortage, i.e. the rx_offload queue will overflow
or a skb fails to be allocated (due to OOM),
can_rx_offload_offload_one() will call mailbox_read() to discard the
mailbox and return an ERR_PTR.

If the hardware FIFO is empty can_rx_offload_offload_one() will return
NULL.

In case a CAN frame was read from the hardware,
can_rx_offload_offload_one() returns the skb containing it.

Without this patch can_rx_offload_irq_offload_fifo() bails out if no skb
returned, regardless of the reason.

Similar to can_rx_offload_irq_offload_timestamp() in case of a resource
shortage the whole FIFO should be discarded, to avoid an IRQ storm and
give the system some time to recover. However if the FIFO is empty the
loop can be left.

With this patch the loop is left in case of empty FIFO, but not on
errors.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: rx-offload: can_rx_offload_irq_offload_timestamp(): continue on error
Jeroen Hofstee [Tue, 24 Sep 2019 18:45:38 +0000 (18:45 +0000)]
can: rx-offload: can_rx_offload_irq_offload_timestamp(): continue on error

In case of a resource shortage, i.e. the rx_offload queue will overflow
or a skb fails to be allocated (due to OOM),
can_rx_offload_offload_one() will call mailbox_read() to discard the
mailbox and return an ERR_PTR.

However can_rx_offload_irq_offload_timestamp() bails out in the error
case. In case of a resource shortage all mailboxes should be discarded,
to avoid an IRQ storm and give the system some time to recover.

Since can_rx_offload_irq_offload_timestamp() is typically called from a
while loop, all message will eventually be discarded. So let's continue
on error instead to discard them directly.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: rx-offload: can_rx_offload_offload_one(): use ERR_PTR() to propagate error value...
Marc Kleine-Budde [Wed, 9 Oct 2019 19:00:32 +0000 (21:00 +0200)]
can: rx-offload: can_rx_offload_offload_one(): use ERR_PTR() to propagate error value in case of errors

Before this patch can_rx_offload_offload_one() returns a pointer to a
skb containing the read CAN frame or a NULL pointer.

However the meaning of the NULL pointer is ambiguous, it can either mean
the requested mailbox is empty or there was an error.

This patch fixes this situation by returning:
- pointer to skb on success
- NULL pointer if mailbox is empty
- ERR_PTR() in case of an error

All users of can_rx_offload_offload_one() have been adopted, no
functional change intended.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: rx-offload: can_rx_offload_offload_one(): increment rx_fifo_errors on queue...
Marc Kleine-Budde [Wed, 9 Oct 2019 13:15:07 +0000 (15:15 +0200)]
can: rx-offload: can_rx_offload_offload_one(): increment rx_fifo_errors on queue overflow or OOM

If the rx-offload skb_queue is full or the skb allocation fails (due to OOM),
the mailbox contents is discarded.

This patch adds the incrementing of the rx_fifo_errors statistics counter.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: rx-offload: can_rx_offload_offload_one(): do not increase the skb_queue beyond...
Marc Kleine-Budde [Wed, 9 Oct 2019 14:03:18 +0000 (16:03 +0200)]
can: rx-offload: can_rx_offload_offload_one(): do not increase the skb_queue beyond skb_queue_len_max

The skb_queue is a linked list, holding the skb to be processed in the
next NAPI call.

Without this patch, the queue length in can_rx_offload_offload_one() is
limited to skb_queue_len_max + 1. As the skb_queue is a linked list, no
array or other resources are accessed out-of-bound, however this
behaviour is counterintuitive.

This patch limits the rx-offload skb_queue length to skb_queue_len_max.

Fixes: d254586c3453 ("can: rx-offload: Add support for HW fifo based irq offloading")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: rx-offload: can_rx_offload_queue_tail(): fix error handling, avoid skb mem leak
Marc Kleine-Budde [Wed, 9 Oct 2019 13:48:48 +0000 (15:48 +0200)]
can: rx-offload: can_rx_offload_queue_tail(): fix error handling, avoid skb mem leak

If the rx-offload skb_queue is full can_rx_offload_queue_tail() will not
queue the skb and return with an error.

This patch frees the skb in case of a full queue, which brings
can_rx_offload_queue_tail() in line with the
can_rx_offload_queue_sorted() function, which has been adjusted in the
previous patch.

The return value is adjusted to -ENOBUFS to better reflect the actual
problem.

The device stats handling is left to the caller.

Fixes: d254586c3453 ("can: rx-offload: Add support for HW fifo based irq offloading")
Reported-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: rx-offload: can_rx_offload_queue_sorted(): fix error handling, avoid skb mem...
Marc Kleine-Budde [Wed, 9 Oct 2019 13:48:48 +0000 (15:48 +0200)]
can: rx-offload: can_rx_offload_queue_sorted(): fix error handling, avoid skb mem leak

If the rx-offload skb_queue is full can_rx_offload_queue_sorted() will
not queue the skb and return with an error.

None of the callers of this function, issue a kfree_skb() to free the
not queued skb. This results in a memory leak.

This patch fixes the problem by freeing the skb in case of a full queue.
The return value is adjusted to -ENOBUFS to better reflect the actual
problem.

The device stats handling is left to the callers, as this function might
be used in both the rx and tx path.

Fixes: 55059f2b7f86 ("can: rx-offload: introduce can_rx_offload_get_echo_skb() and can_rx_offload_queue_sorted() functions")
Cc: linux-stable <stable@vger.kernel.org>
Cc: Martin Hundebøll <martin@geanix.com>
Reported-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: xilinx_can: Fix flags field initialization for axi can
Appana Durga Kedareswara rao [Wed, 9 Oct 2019 07:29:47 +0000 (12:59 +0530)]
can: xilinx_can: Fix flags field initialization for axi can

AXI CANIP doesn't support tx fifo empty interrupt feature(TXFEMP),
update the flags filed in the driver for AXI CAN case accordingly.

Fixes: 3281b380ec9f ("can: xilinx_can: Fix flags field initialization for axi can and canps")
Reported-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Signed-off-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: c_can: C_CAN: add bus recovery events
Jeroen Hofstee [Tue, 1 Oct 2019 21:01:24 +0000 (21:01 +0000)]
can: c_can: C_CAN: add bus recovery events

While the state is updated when the error counters increase and
decrease, there is no event when the bus recovers and the error counters
decrease again. So add that event as well.

Change the state going downward to be ERROR_PASSIVE -> ERROR_WARNING ->
ERROR_ACTIVE instead of directly to ERROR_ACTIVE again.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Acked-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Tested-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: c_can: D_CAN: c_can_chip_config(): perform a sofware reset on open
Jeroen Hofstee [Tue, 1 Oct 2019 21:01:20 +0000 (21:01 +0000)]
can: c_can: D_CAN: c_can_chip_config(): perform a sofware reset on open

When the CAN interface is closed it the hardwre is put in power down
mode, but does not reset the error counters / state. Reset the D_CAN on
open, so the reported state and the actual state match.

According to [1], the C_CAN module doesn't have the software reset.

[1] http://www.bosch-semiconductors.com/media/ip_modules/pdf_2/c_can_fd8/users_manual_c_can_fd8_r210_1.pdf

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: c_can: c_can_poll(): only read status register after status IRQ
Kurt Van Dijck [Tue, 1 Oct 2019 07:40:36 +0000 (09:40 +0200)]
can: c_can: c_can_poll(): only read status register after status IRQ

When the status register is read without the status IRQ pending, the
chip may not raise the interrupt line for an upcoming status interrupt
and the driver may miss a status interrupt.

It is critical that the BUSOFF status interrupt is forwarded to the
higher layers, since no more interrupts will follow without
intervention.

Thanks to Wolfgang and Joe for bringing up the first idea.

Signed-off-by: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Joe Burmeister <joe.burmeister@devtank.co.uk>
Fixes: fa39b54ccf28 ("can: c_can: Get rid of pointless interrupts")
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: peak_usb: report bus recovery as well
Jeroen Hofstee [Wed, 25 Sep 2019 08:58:45 +0000 (08:58 +0000)]
can: peak_usb: report bus recovery as well

While the state changes are reported when the error counters increase
and decrease, there is no event when the bus recovers and the error
counters decrease again. So add those as well.

Change the state going downward to be ERROR_PASSIVE -> ERROR_WARNING ->
ERROR_ACTIVE instead of directly to ERROR_ACTIVE again.

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Cc: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: peak_usb: fix slab info leak
Johan Hovold [Wed, 23 Oct 2019 08:27:05 +0000 (10:27 +0200)]
can: peak_usb: fix slab info leak

Fix a small slab info leak due to a failure to clear the command buffer
at allocation.

The first 16 bytes of the command buffer are always sent to the device
in pcan_usb_send_cmd() even though only the first two may have been
initialised in case no argument payload is provided (e.g. when waiting
for a response).

Fixes: bb4785551f64 ("can: usb: PEAK-System Technik USB adapters driver core")
Cc: stable <stable@vger.kernel.org> # 3.4
Reported-by: syzbot+863724e7128e14b26732@syzkaller.appspotmail.com
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: peak_usb: fix a potential out-of-sync while decoding packets
Stephane Grosjean [Tue, 8 Oct 2019 08:35:44 +0000 (10:35 +0200)]
can: peak_usb: fix a potential out-of-sync while decoding packets

When decoding a buffer received from PCAN-USB, the first timestamp read in
a packet is a 16-bit coded time base, and the next ones are an 8-bit
offset to this base, regardless of the type of packet read.

This patch corrects a potential loss of synchronization by using a
timestamp index read from the buffer, rather than an index of received
data packets, to determine on the sizeof the timestamp to be read from the
packet being decoded.

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Fixes: 46be265d3388 ("can: usb: PEAK-System Technik PCAN-USB specific part")
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: flexcan: disable completely the ECC mechanism
Joakim Zhang [Thu, 15 Aug 2019 08:00:26 +0000 (08:00 +0000)]
can: flexcan: disable completely the ECC mechanism

The ECC (memory error detection and correction) mechanism can be
activated or not, controlled by the ECCDIS bit in CAN_MECR. When
disabled, updates on indications and reporting registers are stopped.
So if want to disable ECC completely, had better assert ECCDIS bit, not
just mask the related interrupts.

Fixes: cdce844865be ("can: flexcan: add vf610 support for FlexCAN")
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: usb_8dev: fix use-after-free on disconnect
Johan Hovold [Tue, 1 Oct 2019 10:29:14 +0000 (12:29 +0200)]
can: usb_8dev: fix use-after-free on disconnect

The driver was accessing its driver data after having freed it.

Fixes: 0024d8ad1639 ("can: usb_8dev: Add support for USB2CAN interface from 8 devices")
Cc: stable <stable@vger.kernel.org> # 3.9
Cc: Bernd Krumboeck <b.krumboeck@gmail.com>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: mcba_usb: fix use-after-free on disconnect
Johan Hovold [Tue, 1 Oct 2019 10:29:13 +0000 (12:29 +0200)]
can: mcba_usb: fix use-after-free on disconnect

The driver was accessing its driver data after having freed it.

Fixes: 51f3baad7de9 ("can: mcba_usb: Add support for Microchip CAN BUS Analyzer")
Cc: stable <stable@vger.kernel.org> # 4.12
Cc: Remigiusz Kołłątaj <remigiusz.kollataj@mobica.com>
Reported-by: syzbot+e29b17e5042bbc56fae9@syzkaller.appspotmail.com
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: gs_usb: gs_can_open(): prevent memory leak
Navid Emamdoost [Fri, 20 Sep 2019 02:44:38 +0000 (21:44 -0500)]
can: gs_usb: gs_can_open(): prevent memory leak

In gs_can_open() if usb_submit_urb() fails the allocated urb should be
released.

Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices")
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agocan: dev: add missing of_node_put() after calling of_get_child_by_name()
Wen Yang [Sat, 28 Sep 2019 14:29:05 +0000 (22:29 +0800)]
can: dev: add missing of_node_put() after calling of_get_child_by_name()

of_node_put() needs to be called when the device node which is got
from of_get_child_by_name() finished using.

Fixes: 2290aefa2e90 ("can: dev: Add support for limiting configured bitrate")
Cc: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Wen Yang <wenyang@linux.alibaba.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
5 years agodccp: do not leak jiffies on the wire
Eric Dumazet [Mon, 4 Nov 2019 15:57:55 +0000 (07:57 -0800)]
dccp: do not leak jiffies on the wire

For some reason I missed the case of DCCP passive
flows in my previous patch.

Fixes: a904a0693c18 ("inet: stop leaking jiffies on the wire")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Thiemo Nagel <tnagel@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: fec: add missed clk_disable_unprepare in remove
Chuhong Yuan [Mon, 4 Nov 2019 15:50:00 +0000 (23:50 +0800)]
net: fec: add missed clk_disable_unprepare in remove

This driver forgets to disable and unprepare clks when remove.
Add calls to clk_disable_unprepare to fix it.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Sat, 2 Nov 2019 00:48:11 +0000 (17:48 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 1) Fix free/alloc races in batmanadv, from Sven Eckelmann.

 2) Several leaks and other fixes in kTLS support of mlx5 driver, from
    Tariq Toukan.

 3) BPF devmap_hash cost calculation can overflow on 32-bit, from Toke
    Høiland-Jørgensen.

 4) Add an r8152 device ID, from Kazutoshi Noguchi.

 5) Missing include in ipv6's addrconf.c, from Ben Dooks.

 6) Use siphash in flow dissector, from Eric Dumazet. Attackers can
    easily infer the 32-bit secret otherwise etc.

 7) Several netdevice nesting depth fixes from Taehee Yoo.

 8) Fix several KCSAN reported errors, from Eric Dumazet. For example,
    when doing lockless skb_queue_empty() checks, and accessing
    sk_napi_id/sk_incoming_cpu lockless as well.

 9) Fix jumbo packet handling in RXRPC, from David Howells.

10) Bump SOMAXCONN and tcp_max_syn_backlog values, from Eric Dumazet.

11) Fix DMA synchronization in gve driver, from Yangchun Fu.

12) Several bpf offload fixes, from Jakub Kicinski.

13) Fix sk_page_frag() recursion during memory reclaim, from Tejun Heo.

14) Fix ping latency during high traffic rates in hisilicon driver, from
    Jiangfent Xiao.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (146 commits)
  net: fix installing orphaned programs
  net: cls_bpf: fix NULL deref on offload filter removal
  selftests: bpf: Skip write only files in debugfs
  selftests: net: reuseport_dualstack: fix uninitalized parameter
  r8169: fix wrong PHY ID issue with RTL8168dp
  net: dsa: bcm_sf2: Fix IMP setup for port different than 8
  net: phylink: Fix phylink_dbg() macro
  gve: Fixes DMA synchronization.
  inet: stop leaking jiffies on the wire
  ixgbe: Remove duplicate clear_bit() call
  Documentation: networking: device drivers: Remove stray asterisks
  e1000: fix memory leaks
  i40e: Fix receive buffer starvation for AF_XDP
  igb: Fix constant media auto sense switching when no cable is connected
  net: ethernet: arc: add the missed clk_disable_unprepare
  igb: Enable media autosense for the i350.
  igb/igc: Don't warn on fatal read failures when the device is removed
  tcp: increase tcp_max_syn_backlog max value
  net: increase SOMAXCONN to 4096
  netdevsim: Fix use-after-free during device dismantle
  ...

5 years agoMerge tag 'nfs-for-5.4-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
Linus Torvalds [Sat, 2 Nov 2019 00:37:44 +0000 (17:37 -0700)]
Merge tag 'nfs-for-5.4-3' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client bugfixes from Anna Schumaker:
 "This contains two delegation fixes (with the RCU lock leak fix marked
  for stable), and three patches to fix destroying the the sunrpc back
  channel.

  Stable bugfixes:

   - Fix an RCU lock leak in nfs4_refresh_delegation_stateid()

  Other fixes:

   - The TCP back channel mustn't disappear while requests are
     outstanding

   - The RDMA back channel mustn't disappear while requests are
     outstanding

   - Destroy the back channel when we destroy the host transport

   - Don't allow a cached open with a revoked delegation"

* tag 'nfs-for-5.4-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFS: Fix an RCU lock leak in nfs4_refresh_delegation_stateid()
  NFSv4: Don't allow a cached open with a revoked delegation
  SUNRPC: Destroy the back channel when we destroy the host transport
  SUNRPC: The RDMA back channel mustn't disappear while requests are outstanding
  SUNRPC: The TCP back channel mustn't disappear while requests are outstanding

5 years agoMerge tag 'for-linus-20191101' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 2 Nov 2019 00:33:12 +0000 (17:33 -0700)]
Merge tag 'for-linus-20191101' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Two small nvme fixes, one is a fabrics connection fix, the other one
   a cleanup made possible by that fix (Anton, via Keith)

 - Fix requeue handling in umb ubd (Anton)

 - Fix spin_lock_irq() nesting in blk-iocost (Dan)

 - Three small io_uring fixes:
     - Install io_uring fd after done with ctx (me)
     - Clear ->result before every poll issue (me)
     - Fix leak of shadow request on error (Pavel)

* tag 'for-linus-20191101' of git://git.kernel.dk/linux-block:
  iocost: don't nest spin_lock_irq in ioc_weight_write()
  io_uring: ensure we clear io_kiocb->result before each issue
  um-ubd: Entrust re-queue to the upper layers
  nvme-multipath: remove unused groups_only mode in ana log
  nvme-multipath: fix possible io hang after ctrl reconnect
  io_uring: don't touch ctx in setup after ring fd install
  io_uring: Fix leaked shadow_req

5 years agoMerge tag 'riscv/for-v5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv...
Linus Torvalds [Sat, 2 Nov 2019 00:20:53 +0000 (17:20 -0700)]
Merge tag 'riscv/for-v5.4-rc6' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Paul Walmsley:
 "One fix for PCIe users:

   - Fix legacy PCI I/O port access emulation

  One set of cleanups:

   - Resolve most of the warnings generated by sparse across arch/riscv.
     No functional changes

  And one MAINTAINERS update:

   - Update Palmer's E-mail address"

* tag 'riscv/for-v5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  MAINTAINERS: Change to my personal email address
  RISC-V: Add PCIe I/O BAR memory mapping
  riscv: for C functions called only from assembly, mark with __visible
  riscv: fp: add missing __user pointer annotations
  riscv: add missing header file includes
  riscv: mark some code and data as file-static
  riscv: init: merge split string literals in preprocessor directive
  riscv: add prototypes for assembly language functions from head.S

5 years agopowerpc/bpf: Fix tail call implementation
Eric Dumazet [Fri, 1 Nov 2019 03:34:44 +0000 (20:34 -0700)]
powerpc/bpf: Fix tail call implementation

We have seen many crashes on powerpc hosts while loading bpf programs.

The problem here is that bpf_int_jit_compile() does a first pass
to compute the program length.

Then it allocates memory to store the generated program and
calls bpf_jit_build_body() a second time (and a third time
later)

What I have observed is that the second bpf_jit_build_body()
could end up using few more words than expected.

If bpf_jit_binary_alloc() put the space for the program
at the end of the allocated page, we then write on
a non mapped memory.

It appears that bpf_jit_emit_tail_call() calls
bpf_jit_emit_common_epilogue() while ctx->seen might not
be stable.

Only after the second pass we can be sure ctx->seen wont be changed.

Trying to avoid a second pass seems quite complex and probably
not worth it.

Fixes: ce0761419faef ("powerpc/bpf: Implement support for tail calls")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Naveen N. Rao <naveen.n.rao@linux.ibm.com>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20191101033444.143741-1-edumazet@google.com
5 years agoMerge branch 'parisc-5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Fri, 1 Nov 2019 22:16:25 +0000 (15:16 -0700)]
Merge branch 'parisc-5.4-3' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fix from Helge Deller:
 "Fix a parisc kernel crash with ftrace functions when compiled without
  frame pointers"

* 'parisc-5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix frame pointer in ftrace_regs_caller()

5 years agoMerge branch 'fix-BPF-offload-related-bugs'
David S. Miller [Fri, 1 Nov 2019 22:16:01 +0000 (15:16 -0700)]
Merge branch 'fix-BPF-offload-related-bugs'

Jakub Kicinski says:

====================
fix BPF offload related bugs

test_offload.py catches some recently added bugs.

First of a bug in test_offload.py itself after recent changes
to netdevsim is fixed.

Second patch fixes a bug in cls_bpf, and last one addresses
a problem with the recently added XDP installation optimization.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: fix installing orphaned programs
Jakub Kicinski [Fri, 1 Nov 2019 03:07:00 +0000 (20:07 -0700)]
net: fix installing orphaned programs

When netdevice with offloaded BPF programs is destroyed
the programs are orphaned and removed from the program
IDA - their IDs get released (the programs may remain
accessible via existing open file descriptors and pinned
files). After IDs are released they are set to 0.

This confuses dev_change_xdp_fd() because it compares
the __dev_xdp_query() result where 0 means no program
with prog->aux->id where 0 means orphaned.

dev_change_xdp_fd() would have incorrectly returned success
even though it had not installed the program.

Since drivers already catch this case via bpf_offload_dev_match()
let them handle this case. The error message drivers produce in
this case ("program loaded for a different device") is in fact
correct as the orphaned program must had to be loaded for a
different device.

Fixes: c14a9f633d9e ("net: Don't call XDP_SETUP_PROG when nothing is changed")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: cls_bpf: fix NULL deref on offload filter removal
Jakub Kicinski [Fri, 1 Nov 2019 03:06:59 +0000 (20:06 -0700)]
net: cls_bpf: fix NULL deref on offload filter removal

Commit 401192113730 ("net: sched: refactor block offloads counter
usage") missed the fact that either new prog or old prog may be
NULL.

Fixes: 401192113730 ("net: sched: refactor block offloads counter usage")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftests: bpf: Skip write only files in debugfs
Jakub Kicinski [Fri, 1 Nov 2019 03:06:58 +0000 (20:06 -0700)]
selftests: bpf: Skip write only files in debugfs

DebugFS for netdevsim now contains some "action trigger" files
which are write only. Don't try to capture the contents of those.

Note that we can't use os.access() because the script requires
root.

Fixes: 4418f862d675 ("netdevsim: implement support for devlink region and snapshots")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftests: net: reuseport_dualstack: fix uninitalized parameter
Wei Wang [Thu, 31 Oct 2019 23:24:36 +0000 (16:24 -0700)]
selftests: net: reuseport_dualstack: fix uninitalized parameter

This test reports EINVAL for getsockopt(SOL_SOCKET, SO_DOMAIN)
occasionally due to the uninitialized length parameter.
Initialize it to fix this, and also use int for "test_family" to comply
with the API standard.

Fixes: d6a61f80b871 ("soreuseport: test mixed v4/v6 sockets")
Reported-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Cc: Craig Gallek <cgallek@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agor8169: fix wrong PHY ID issue with RTL8168dp
Heiner Kallweit [Thu, 31 Oct 2019 23:10:21 +0000 (00:10 +0100)]
r8169: fix wrong PHY ID issue with RTL8168dp

As reported in [0] at least one RTL8168dp version has problems
establishing a link. This chip version has an integrated RTL8211b PHY,
however the chip seems to report a wrong PHY ID, resulting in a wrong
PHY driver (for Generic Realtek PHY) being loaded.
Work around this issue by adding a hook to r8168dp_2_mdio_read()
for returning the correct PHY ID.

[0] https://bbs.archlinux.org/viewtopic.php?id=246508

Fixes: 242cd9b5866a ("r8169: use phy_resume/phy_suspend")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: dsa: bcm_sf2: Fix IMP setup for port different than 8
Florian Fainelli [Thu, 31 Oct 2019 22:54:05 +0000 (15:54 -0700)]
net: dsa: bcm_sf2: Fix IMP setup for port different than 8

Since it became possible for the DSA core to use a CPU port different
than 8, our bcm_sf2_imp_setup() function was broken because it assumes
that registers are applicable to port 8. In particular, the port's MAC
is going to stay disabled, so make sure we clear the RX_DIS and TX_DIS
bits if we are not configured for port 8.

Fixes: 9f91484f6fcc ("net: dsa: make "label" property optional for dsa2")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: phylink: Fix phylink_dbg() macro
Florian Fainelli [Thu, 31 Oct 2019 22:42:26 +0000 (15:42 -0700)]
net: phylink: Fix phylink_dbg() macro

The phylink_dbg() macro does not follow dynamic debug or defined(DEBUG)
and as a result, it spams the kernel log since a PR_DEBUG level is
currently used. Fix it to be defined appropriately whether
CONFIG_DYNAMIC_DEBUG or defined(DEBUG) are set.

Fixes: 17091180b152 ("net: phylink: Add phylink_{printk, err, warn, info, dbg} macros")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agogve: Fixes DMA synchronization.
Yangchun Fu [Fri, 1 Nov 2019 17:09:56 +0000 (10:09 -0700)]
gve: Fixes DMA synchronization.

Synces the DMA buffer properly in order for CPU and device to see
the most up-to-data data.

Signed-off-by: Yangchun Fu <yangchun@google.com>
Reviewed-by: Catherine Sullivan <csully@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoinet: stop leaking jiffies on the wire
Eric Dumazet [Fri, 1 Nov 2019 17:32:19 +0000 (10:32 -0700)]
inet: stop leaking jiffies on the wire

Historically linux tried to stick to RFC 791, 1122, 2003
for IPv4 ID field generation.

RFC 6864 made clear that no matter how hard we try,
we can not ensure unicity of IP ID within maximum
lifetime for all datagrams with a given source
address/destination address/protocol tuple.

Linux uses a per socket inet generator (inet_id), initialized
at connection startup with a XOR of 'jiffies' and other
fields that appear clear on the wire.

Thiemo Nagel pointed that this strategy is a privacy
concern as this provides 16 bits of entropy to fingerprint
devices.

Let's switch to a random starting point, this is just as
good as far as RFC 6864 is concerned and does not leak
anything critical.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Thiemo Nagel <tnagel@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net...
David S. Miller [Fri, 1 Nov 2019 21:50:27 +0000 (14:50 -0700)]
Merge branch '1GbE' of git://git./linux/kernel/git/jkirsher/net-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2019-11-01

This series contains updates to e1000, igb, igc, ixgbe, i40e and driver
documentation.

Lyude Paul fixes an issue where a fatal read error occurs when the
device is unplugged from the machine.  So change the read error into a
warn while the device is still present.

Manfred Rudigier found that the i350 device was not apart of the "Media
Auto Sense" feature, yet the device supports it.  So add the missing
i350 device to the check and fix an issue where the media auto sense
would flip/flop when no cable was connected to the port causing spurious
kernel log messages.

I fixed an issue where the fix to resolve receive buffer starvation was
applied in more than one place in the driver, one being the incorrect
location in the i40e driver.

Wenwen Wang fixes a potential memory leak in e1000 where allocated
memory is not properly cleaned up in one of the error paths.

Jonathan Neuschäfer cleans up the driver documentation to be consistent
and remove the footnote reference, since the footnote no longer exists in
the documentation.

Igor Pylypiv cleans up a duplicate clearing of a bit, no need to clear
it twice.

v2: Fixed alignment issue in patch 3 of the series based on community
    feedback.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoixgbe: Remove duplicate clear_bit() call
Igor Pylypiv [Fri, 4 Oct 2019 06:53:57 +0000 (23:53 -0700)]
ixgbe: Remove duplicate clear_bit() call

__IXGBE_RX_BUILD_SKB_ENABLED bit is already cleared.

Signed-off-by: Igor Pylypiv <igor.pylypiv@gmail.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoDocumentation: networking: device drivers: Remove stray asterisks
Jonathan Neuschäfer [Wed, 2 Oct 2019 15:09:55 +0000 (17:09 +0200)]
Documentation: networking: device drivers: Remove stray asterisks

These asterisks were once references to a line that said:
  "* Other names and brands may be claimed as the property of others."
But now, they serve no purpose; they can only irritate the reader.

Fixes: de3edab4276c ("e1000: update README for e1000")
Fixes: a3fb65680f65 ("e100.txt: Cleanup license info in kernel doc")
Fixes: da8c01c4502a ("e1000e.txt: Add e1000e documentation")
Fixes: f12a84a9f650 ("Documentation: fm10k: Add kernel documentation")
Fixes: b55c52b1938c ("igb.txt: Add igb documentation")
Fixes: c4e9b56e2442 ("igbvf.txt: Add igbvf Documentation")
Fixes: d7064f4c192c ("Documentation/networking/: Update Intel wired LAN driver documentation")
Fixes: c4b8c01112a1 ("ixgbevf.txt: Update ixgbevf documentation")
Fixes: 1e06edcc2f22 ("Documentation: i40e: Prepare documentation for RST conversion")
Fixes: 105bf2fe6b32 ("i40evf: add driver to kernel build system")
Fixes: 1fae869bcf3d ("Documentation: ice: Prepare documentation for RST conversion")
Fixes: df69ba43217d ("ionic: Add basic framework for IONIC Network device driver")
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoe1000: fix memory leaks
Wenwen Wang [Mon, 12 Aug 2019 05:59:21 +0000 (00:59 -0500)]
e1000: fix memory leaks

In e1000_set_ringparam(), 'tx_old' and 'rx_old' are not deallocated if
e1000_up() fails, leading to memory leaks. Refactor the code to fix this
issue.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoi40e: Fix receive buffer starvation for AF_XDP
Jeff Kirsher [Mon, 7 Oct 2019 22:07:24 +0000 (15:07 -0700)]
i40e: Fix receive buffer starvation for AF_XDP

Magnus's fix to resolve a potential receive buffer starvation for AF_XDP
got applied to both the i40e_xsk_umem_enable/disable() functions, when it
should have only been applied to the "enable".  So clean up the undesired
code in the disable function.

CC: Magnus Karlsson <magnus.karlsson@intel.com>
Fixes: 1f459bdc2007 ("i40e: fix potential RX buffer starvation for AF_XDP")
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
5 years agoigb: Fix constant media auto sense switching when no cable is connected
Manfred Rudigier [Thu, 15 Aug 2019 20:55:20 +0000 (13:55 -0700)]
igb: Fix constant media auto sense switching when no cable is connected

At least on the i350 there is an annoying behavior that is maybe also
present on 82580 devices, but was probably not noticed yet as MAS is not
widely used.

If no cable is connected on both fiber/copper ports the media auto sense
code will constantly swap between them as part of the watchdog task and
produce many unnecessary kernel log messages.

The swap code responsible for this behavior (switching to fiber) should
not be executed if the current media type is copper and there is no signal
detected on the fiber port. In this case we can safely wait until the
AUTOSENSE_EN bit is cleared.

Signed-off-by: Manfred Rudigier <manfred.rudigier@omicronenergy.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 1 Nov 2019 18:49:54 +0000 (11:49 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:
 "Fix two scheduler topology bugs/oversights on Juno r0 2+4 big.LITTLE
  systems"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/topology: Allow sched_asym_cpucapacity to be disabled
  sched/topology: Don't try to build empty sched domains

5 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 1 Nov 2019 18:40:47 +0000 (11:40 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Misc fixes: an ABI fix for a reserved field, AMD IBS fixes, an Intel
  uncore PMU driver fix and a header typo fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/headers: Fix spelling s/EACCESS/EACCES/, s/privilidge/privilege/
  perf/x86/uncore: Fix event group support
  perf/x86/amd/ibs: Handle erratum #420 only on the affected CPU family (10h)
  perf/x86/amd/ibs: Fix reading of the IBS OpData register and thus precise RIP validity
  perf/core: Start rejecting the syscall with attr.__reserved_2 set

5 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 1 Nov 2019 18:32:50 +0000 (11:32 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "Various fixes all over the map: prevent boot crashes on HyperV,
  classify UEFI randomness as bootloader randomness, fix EFI boot for
  the Raspberry Pi2, fix efi_test permissions, etc"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN
  x86, efi: Never relocate kernel below lowest acceptable address
  efi: libstub/arm: Account for firmware reserved memory at the base of RAM
  efi/random: Treat EFI_RNG_PROTOCOL output as bootloader randomness
  efi/tpm: Return -EINVAL when determining tpm final events log size fails
  efi: Make CONFIG_EFI_RCI2_TABLE selectable on x86 only

5 years agoMerge tag 'wireless-drivers-2019-11-01' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Fri, 1 Nov 2019 17:36:46 +0000 (10:36 -0700)]
Merge tag 'wireless-drivers-2019-11-01' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for 5.4

Third set of fixes for 5.4. Most of them are for iwlwifi but important
fixes also for rtlwifi and mt76, the overflow fix for rtlwifi being
most important.

iwlwifi

* fix merge damage on earlier patch

* various fixes to device id handling

* fix scan config command handling which caused firmware asserts

rtlwifi

* fix overflow on P2P IE handling

* don't deliver too small frames to mac80211

mt76

* disable PCIE_ASPM

* fix buffer DMA unmap on certain cases
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: ethernet: arc: add the missed clk_disable_unprepare
Chuhong Yuan [Fri, 1 Nov 2019 12:17:25 +0000 (20:17 +0800)]
net: ethernet: arc: add the missed clk_disable_unprepare

The remove misses to disable and unprepare priv->macclk like what is done
when probe fails.
Add the missed call in remove.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 1 Nov 2019 17:03:46 +0000 (10:03 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "These are almost exclusively related to CPU errata in CPUs from
  Broadcom and Qualcomm where the workarounds were either not being
  enabled when they should have been or enabled when they shouldn't have
  been.

  The only "interesting" fix is ensuring that writeable, shared mappings
  are initially mapped as clean since we inadvertently broke the logic
  back in v4.14 and then noticed the problem via code inspection the
  other day.

  The only critical issue we have outstanding is a sporadic NULL
  dereference in the scheduler, which doesn't appear to be
  arm64-specific and PeterZ is tearing his hair out over it at the
  moment.

  Summary:

   - Enable CPU errata workarounds for Broadcom Brahma-B53

   - Enable CPU errata workarounds for Qualcomm Hydra/Kryo CPUs

   - Fix initial dirty status of writeable, shared mappings"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: apply ARM64_ERRATUM_843419 workaround for Brahma-B53 core
  arm64: Brahma-B53 is SSB and spectre v2 safe
  arm64: apply ARM64_ERRATUM_845719 workaround for Brahma-B53 core
  arm64: cpufeature: Enable Qualcomm Falkor errata 1009 for Kryo
  arm64: cpufeature: Enable Qualcomm Falkor/Kryo errata 1003
  arm64: Ensure VM_WRITE|VM_SHARED ptes are clean by default

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 1 Nov 2019 16:54:38 +0000 (09:54 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "generic:
   - fix memory leak on failure to create VM

  x86:
   - fix MMU corner case with AMD nested paging disabled"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: vmx, svm: always run with EFER.NXE=1 when shadow paging is active
  kvm: call kvm_arch_destroy_vm if vm creation fails
  kvm: Allocate memslots and buses before calling kvm_arch_init_vm

5 years agoMerge tag 'drm-fixes-2019-11-01' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 1 Nov 2019 16:41:08 +0000 (09:41 -0700)]
Merge tag 'drm-fixes-2019-11-01' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "This is the regular drm fixes pull request for 5.4-rc6. It's a bit
  larger than I'd like but then last week was quieter than usual.

  The main fixes are amdgpu, and the two bigger area are navi fixes
  which are the newest GPU range so still getting actively fixed up, but
  also a bunch of clang stack alignment fixes (as amdgpu uses double in
  some places).

  Otherwise it's all fairly run of the mill fixes, i915, panfrost,
  etnaviv, v3d and radeon, along with a core scheduler fix.

  Summary:

  amdgpu:
   - clang alignment fixes
   - Updated golden settings
   - navi: gpuvm, sdma and display fixes
   - Freesync fix
   - Gamma fix for DCN
   - DP dongle detection fix
   - vega10: Fix for undervolting

  radeon:
   - reenable kexec fix for ppc

  scheduler:
   - set an error if hw job failed

  i915:
   - fix PCH reference clock for HSW/BDW
   - TGL display PLL doc fix

  panfrost:
   - warning fix
   - runtime pm fix
   - bad pointer dereference fix

  v3d:
   - memleak fix

  etnaviv:
   - memory corruption fix
   - deadlock fix
   - reintroduce lost debug message"

* tag 'drm-fixes-2019-11-01' of git://anongit.freedesktop.org/drm/drm: (29 commits)
  drm/amdgpu: enable -msse2 for GCC 7.1+ users
  drm/amdgpu: fix stack alignment ABI mismatch for GCC 7.1+
  drm/amdgpu: fix stack alignment ABI mismatch for Clang
  drm/radeon: Fix EEH during kexec
  drm/amdgpu/gmc10: properly set BANK_SELECT and FRAGMENT_SIZE
  drm/amdgpu/powerplay/vega10: allow undervolting in p7
  dc.c:use kzalloc without test
  drm/amd/display: setting the DIG_MODE to the correct value.
  drm/amd/display: Passive DP->HDMI dongle detection fix
  drm/amd/display: add 50us buffer as WA for pstate switch in active
  drm/amd/display: Allow inverted gamma
  drm/amd/display: do not synchronize "drr" displays
  drm/amdgpu: If amdgpu_ib_schedule fails return back the error.
  drm/sched: Set error to s_fence if HW job submission failed.
  drm/amdgpu/gfx10: update gfx golden settings for navi12
  drm/amdgpu/gfx10: update gfx golden settings for navi14
  drm/amdgpu/gfx10: update gfx golden settings
  drm/amd/display: Change Navi14's DWB flag to 1
  drm/amdgpu/sdma5: do not execute 0-sized IBs (v2)
  drm/amdgpu: Fix SDMA hang when performing VKexample test
  ...

5 years agoMerge tag 'pm-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 1 Nov 2019 16:30:48 +0000 (09:30 -0700)]
Merge tag 'pm-5.4-rc6' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Fix a recently introduced (mostly theoretical) issue that the requests
  to confine the maximum CPU frequency coming from the platform firmware
  may not be taken into account if multiple CPUs are covered by one
  cpufreq policy on a system with ACPI"

* tag 'pm-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: processor: Add QoS requests for all CPUs

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Linus Torvalds [Fri, 1 Nov 2019 16:21:48 +0000 (09:21 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "A number of bug fixes and a regression fix:

   - Various issues from static analysis in hfi1, uverbs, hns, and cxgb4

   - Fix for deadlock in a case when the new auto RDMA module loading is
     used

   - Missing _irq notation in a prior -rc patch found by lockdep

   - Fix a locking and lifetime issue in siw

   - Minor functional bug fixes in cxgb4, mlx5, qedr

   - Fix a regression where vlan interfaces no longer worked with RDMA
     CM in some cases"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/hns: Prevent memory leaks of eq->buf_list
  RDMA/iw_cxgb4: Avoid freeing skb twice in arp failure case
  RDMA/mlx5: Use irq xarray locking for mkey_table
  IB/core: Avoid deadlock during netlink message handling
  RDMA/nldev: Skip counter if port doesn't match
  RDMA/uverbs: Prevent potential underflow
  IB/core: Use rdma_read_gid_l2_fields to compare GID L2 fields
  RDMA/qedr: Fix reported firmware version
  RDMA/siw: free siw_base_qp in kref release routine
  RDMA/iwcm: move iw_rem_ref() calls out of spinlock
  iw_cxgb4: fix ECN check on the passive accept
  IB/hfi1: Use a common pad buffer for 9B and 16B packets
  IB/hfi1: Avoid excessive retry for TID RDMA READ request
  RDMA/mlx5: Clear old rate limit when closing QP

5 years agoMerge tag 'sound-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 1 Nov 2019 16:18:00 +0000 (09:18 -0700)]
Merge tag 'sound-5.4-rc6' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A couple of regression fixes and a fix for mutex deadlock at
  hog-unplug, as well as other device-specific fixes:

   - A commit to avoid the spurious unsolicited interrupt on HD-audio
     bus caused a stall at shutdown, so it's reverted now.

   - The recent support of AMD/Nvidia audio component binding caused a
     mutex deadlock; fixed by splitting to another mutex

   - The device hot-unplug and the ALSA timer close combo may lead to
     another mutex deadlock; fixed by moving put_device() calls

   - Usual device-specific small quirks for HD- and USB-audio drivers

   - An old error check fix in FireWire driver"

* tag 'sound-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: timer: Fix mutex deadlock at releasing card
  ALSA: hda - Fix mutex deadlock in HDMI codec driver
  Revert "ALSA: hda: Flush interrupts on disabling"
  ALSA: bebob: Fix prototype of helper function to return negative value
  ALSA: hda/realtek - Fix 2 front mics of codec 0x623
  ALSA: hda/realtek - Add support for ALC623
  ALSA: usb-audio: Add DSD support for Gustard U16/X26 USB Interface

5 years agoNFS: Fix an RCU lock leak in nfs4_refresh_delegation_stateid()
Trond Myklebust [Thu, 31 Oct 2019 22:40:33 +0000 (18:40 -0400)]
NFS: Fix an RCU lock leak in nfs4_refresh_delegation_stateid()

A typo in nfs4_refresh_delegation_stateid() means we're leaking an
RCU lock, and always returning a value of 'false'. As the function
description states, we were always supposed to return 'true' if a
matching delegation was found.

Fixes: 12f275cdd163 ("NFSv4: Retry CLOSE and DELEGRETURN on NFS4ERR_OLD_STATEID.")
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
5 years agoNFSv4: Don't allow a cached open with a revoked delegation
Trond Myklebust [Thu, 31 Oct 2019 22:40:32 +0000 (18:40 -0400)]
NFSv4: Don't allow a cached open with a revoked delegation

If the delegation is marked as being revoked, we must not use it
for cached opens.

Fixes: 869f9dfa4d6d ("NFSv4: Fix races between nfs_remove_bad_delegation() and delegation return")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
5 years agoarm64: apply ARM64_ERRATUM_843419 workaround for Brahma-B53 core
Florian Fainelli [Thu, 31 Oct 2019 21:47:25 +0000 (14:47 -0700)]
arm64: apply ARM64_ERRATUM_843419 workaround for Brahma-B53 core

The Broadcom Brahma-B53 core is susceptible to the issue described by
ARM64_ERRATUM_843419 so this commit enables the workaround to be applied
when executing on that core.

Since there are now multiple entries to match, we must convert the
existing ARM64_ERRATUM_843419 into an erratum list and use
cpucap_multi_entry_cap_matches to match our entries.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>
5 years agoarm64: Brahma-B53 is SSB and spectre v2 safe
Florian Fainelli [Thu, 31 Oct 2019 21:47:24 +0000 (14:47 -0700)]
arm64: Brahma-B53 is SSB and spectre v2 safe

Add the Brahma-B53 CPU (all versions) to the whitelists of CPUs for the
SSB and spectre v2 mitigations.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>
5 years agoarm64: apply ARM64_ERRATUM_845719 workaround for Brahma-B53 core
Doug Berger [Thu, 31 Oct 2019 21:47:23 +0000 (14:47 -0700)]
arm64: apply ARM64_ERRATUM_845719 workaround for Brahma-B53 core

The Broadcom Brahma-B53 core is susceptible to the issue described by
ARM64_ERRATUM_845719 so this commit enables the workaround to be applied
when executing on that core.

Since there are now multiple entries to match, we must convert the
existing ARM64_ERRATUM_845719 into an erratum list.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>
5 years agoMerge tag 'drm-fixes-5.4-2019-10-30' of git://people.freedesktop.org/~agd5f/linux...
Dave Airlie [Fri, 1 Nov 2019 01:27:39 +0000 (11:27 +1000)]
Merge tag 'drm-fixes-5.4-2019-10-30' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

drm-fixes-5.4-2019-10-30:

amdgpu:
- clang fixes
- Updated golden settings
- GPUVM fixes for navi
- Navi sdma fix
- Navi display fixes
- Freesync fix
- Gamma fix for DCN
- DP dongle detection fix
- Fix for undervolting on vega10

radeon:
- enable kexec fix for PPC

scheduler:
- set an error on fence if hw job failed

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191030162339.44366-1-alexander.deucher@amd.com
5 years agoMerge tag 'drm-intel-fixes-2019-10-31' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 1 Nov 2019 01:13:35 +0000 (11:13 +1000)]
Merge tag 'drm-intel-fixes-2019-10-31' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fix PCH reference clock for FDI on HSW/BDW which was causing users blank screen
- Small documentation fix for TGL display PLLs

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191031171209.GA6586@intel.com
5 years agoMerge tag 'drm-misc-fixes-2019-10-30-1' of git://anongit.freedesktop.org/drm/drm...
Dave Airlie [Fri, 1 Nov 2019 01:09:42 +0000 (11:09 +1000)]
Merge tag 'drm-misc-fixes-2019-10-30-1' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

 - three fixes for panfrost, one to silence a warning, one to fix
   runtime_pm and one to prevent bogus pointer dereferences
 - one fix for a memleak in v3d

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191030182207.evrscl7lnv42u5zu@hendrix
5 years agoMerge branch 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux into drm...
Dave Airlie [Fri, 1 Nov 2019 01:08:24 +0000 (11:08 +1000)]
Merge branch 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux into drm-fixes

One memory corruption fix in the MMUv2 GPU coredump code, a deadlock
fix also in the coredump code and reintroduction of a helpful message,
which got dropped by accident in this cycle.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Lucas Stach <l.stach@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/b0d640267662e3ce5e0089d0afedc1baba55058d.camel@pengutronix.de
5 years agoigb: Enable media autosense for the i350.
Manfred Rudigier [Thu, 15 Aug 2019 20:55:19 +0000 (13:55 -0700)]
igb: Enable media autosense for the i350.

This patch enables the hardware feature "Media Auto Sense" also on the
i350. It works in the same way as on the 82850 devices. Hardware designs
using dual PHYs (fiber/copper) can enable this feature by setting the MAS
enable bits in the NVM_COMPAT register (0x03) in the EEPROM.

Signed-off-by: Manfred Rudigier <manfred.rudigier@omicronenergy.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agoigb/igc: Don't warn on fatal read failures when the device is removed
Lyude Paul [Thu, 22 Aug 2019 18:33:18 +0000 (14:33 -0400)]
igb/igc: Don't warn on fatal read failures when the device is removed

Fatal read errors are worth warning about, unless of course the device
was just unplugged from the machine - something that's a rather normal
occurrence when the igb/igc adapter is located on a Thunderbolt dock. So,
let's only WARN() if there's a fatal read error while the device is
still present.

This fixes the following WARN splat that's been appearing whenever I
unplug my Caldigit TS3 Thunderbolt dock from my laptop:

  igb 0000:09:00.0 enp9s0: PCIe link lost
  ------------[ cut here ]------------
  igb: Failed to read reg 0x18!
  WARNING: CPU: 7 PID: 516 at
  drivers/net/ethernet/intel/igb/igb_main.c:756 igb_rd32+0x57/0x6a [igb]
  Modules linked in: igb dca thunderbolt fuse vfat fat elan_i2c mei_wdt
  mei_hdcp i915 wmi_bmof intel_wmi_thunderbolt iTCO_wdt
  iTCO_vendor_support x86_pkg_temp_thermal intel_powerclamp joydev
  coretemp crct10dif_pclmul crc32_pclmul i2c_algo_bit ghash_clmulni_intel
  intel_cstate drm_kms_helper intel_uncore syscopyarea sysfillrect
  sysimgblt fb_sys_fops intel_rapl_perf intel_xhci_usb_role_switch mei_me
  drm roles idma64 i2c_i801 ucsi_acpi typec_ucsi mei intel_lpss_pci
  processor_thermal_device typec intel_pch_thermal intel_soc_dts_iosf
  intel_lpss int3403_thermal thinkpad_acpi wmi int340x_thermal_zone
  ledtrig_audio int3400_thermal acpi_thermal_rel acpi_pad video
  pcc_cpufreq ip_tables serio_raw nvme nvme_core crc32c_intel uas
  usb_storage e1000e i2c_dev
  CPU: 7 PID: 516 Comm: kworker/u16:3 Not tainted 5.2.0-rc1Lyude-Test+ #14
  Hardware name: LENOVO 20L8S2N800/20L8S2N800, BIOS N22ET35W (1.12 ) 04/09/2018
  Workqueue: kacpi_hotplug acpi_hotplug_work_fn
  RIP: 0010:igb_rd32+0x57/0x6a [igb]
  Code: 87 b8 fc ff ff 48 c7 47 08 00 00 00 00 48 c7 c6 33 42 9b c0 4c 89
  c7 e8 47 45 cd dc 89 ee 48 c7 c7 43 42 9b c0 e8 c1 94 71 dc <0f> 0b eb
  08 8b 00 ff c0 75 b0 eb c8 44 89 e0 5d 41 5c c3 0f 1f 44
  RSP: 0018:ffffba5801cf7c48 EFLAGS: 00010286
  RAX: 0000000000000000 RBX: ffff9e7956608840 RCX: 0000000000000007
  RDX: 0000000000000000 RSI: ffffba5801cf7b24 RDI: ffff9e795e3d6a00
  RBP: 0000000000000018 R08: 000000009dec4a01 R09: ffffffff9e61018f
  R10: 0000000000000000 R11: ffffba5801cf7ae5 R12: 00000000ffffffff
  R13: ffff9e7956608840 R14: ffff9e795a6f10b0 R15: 0000000000000000
  FS:  0000000000000000(0000) GS:ffff9e795e3c0000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000564317bc4088 CR3: 000000010e00a006 CR4: 00000000003606e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
   igb_release_hw_control+0x1a/0x30 [igb]
   igb_remove+0xc5/0x14b [igb]
   pci_device_remove+0x3b/0x93
   device_release_driver_internal+0xd7/0x17e
   pci_stop_bus_device+0x36/0x75
   pci_stop_bus_device+0x66/0x75
   pci_stop_bus_device+0x66/0x75
   pci_stop_and_remove_bus_device+0xf/0x19
   trim_stale_devices+0xc5/0x13a
   ? __pm_runtime_resume+0x6e/0x7b
   trim_stale_devices+0x103/0x13a
   ? __pm_runtime_resume+0x6e/0x7b
   trim_stale_devices+0x103/0x13a
   acpiphp_check_bridge+0xd8/0xf5
   acpiphp_hotplug_notify+0xf7/0x14b
   ? acpiphp_check_bridge+0xf5/0xf5
   acpi_device_hotplug+0x357/0x3b5
   acpi_hotplug_work_fn+0x1a/0x23
   process_one_work+0x1a7/0x296
   worker_thread+0x1a8/0x24c
   ? process_scheduled_works+0x2c/0x2c
   kthread+0xe9/0xee
   ? kthread_destroy_worker+0x41/0x41
   ret_from_fork+0x35/0x40
  ---[ end trace 252bf10352c63d22 ]---

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: 47e16692b26b ("igb/igc: warn when fatal read failure happens")
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Acked-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
5 years agotcp: increase tcp_max_syn_backlog max value
Eric Dumazet [Wed, 30 Oct 2019 17:05:46 +0000 (10:05 -0700)]
tcp: increase tcp_max_syn_backlog max value

tcp_max_syn_backlog default value depends on memory size
and TCP ehash size. Before this patch, the max value
was 2048 [1], which is considered too small nowadays.

Increase it to 4096 to match the recent SOMAXCONN change.

[1] This is with TCP ehash size being capped to 524288 buckets.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Yue Cao <ycao009@ucr.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: increase SOMAXCONN to 4096
Eric Dumazet [Wed, 30 Oct 2019 16:36:20 +0000 (09:36 -0700)]
net: increase SOMAXCONN to 4096

SOMAXCONN is /proc/sys/net/core/somaxconn default value.

It has been defined as 128 more than 20 years ago.

Since it caps the listen() backlog values, the very small value has
caused numerous problems over the years, and many people had
to raise it on their hosts after beeing hit by problems.

Google has been using 1024 for at least 15 years, and we increased
this to 4096 after TCP listener rework has been completed, more than
4 years ago. We got no complain of this change breaking any
legacy application.

Many applications indeed setup a TCP listener with listen(fd, -1);
meaning they let the system select the backlog.

Raising SOMAXCONN lowers chance of the port being unavailable under
even small SYNFLOOD attack, and reduces possibilities of side channel
vulnerabilities.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Yue Cao <ycao009@ucr.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'pm-cpufreq'
Rafael J. Wysocki [Thu, 31 Oct 2019 20:41:37 +0000 (21:41 +0100)]
Merge branch 'pm-cpufreq'

* pm-cpufreq:
  ACPI: processor: Add QoS requests for all CPUs

5 years agobpf: Change size to u64 for bpf_map_{area_alloc, charge_init}()
Björn Töpel [Tue, 29 Oct 2019 15:43:07 +0000 (16:43 +0100)]
bpf: Change size to u64 for bpf_map_{area_alloc, charge_init}()

The functions bpf_map_area_alloc() and bpf_map_charge_init() prior
this commit passed the size parameter as size_t. In this commit this
is changed to u64.

All users of these functions avoid size_t overflows on 32-bit systems,
by explicitly using u64 when calculating the allocation size and
memory charge cost. However, since the result was narrowed by the
size_t when passing size and cost to the functions, the overflow
handling was in vain.

Instead of changing all call sites to size_t and handle overflow at
the call site, the parameter is changed to u64 and checked in the
functions above.

Fixes: d407bd25a204 ("bpf: don't trigger OOM killer under pressure with map alloc")
Fixes: c85d69135a91 ("bpf: move memory size checks to bpf_map_charge_init()")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Link: https://lore.kernel.org/bpf/20191029154307.23053-1-bjorn.topel@gmail.com
5 years agosamples/bpf: fix build by setting HAVE_ATTR_TEST to zero
Björn Töpel [Tue, 1 Oct 2019 11:33:07 +0000 (13:33 +0200)]
samples/bpf: fix build by setting HAVE_ATTR_TEST to zero

To remove that test_attr__{enabled/open} are used by perf-sys.h, we
set HAVE_ATTR_TEST to zero.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Tested-by: KP Singh <kpsingh@google.com>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lore.kernel.org/bpf/20191001113307.27796-3-bjorn.topel@gmail.com
5 years agoperf tools: Make usage of test_attr__* optional for perf-sys.h
Björn Töpel [Tue, 1 Oct 2019 11:33:06 +0000 (13:33 +0200)]
perf tools: Make usage of test_attr__* optional for perf-sys.h

For users of perf-sys.h outside perf, e.g. samples/bpf/bpf_load.c, it's
convenient not to depend on test_attr__*.

After commit 91854f9a077e ("perf tools: Move everything related to
sys_perf_event_open() to perf-sys.h"), all users of perf-sys.h will
depend on test_attr__enabled and test_attr__open.

This commit enables a user to define HAVE_ATTR_TEST to zero in order
to omit the test dependency.

Fixes: 91854f9a077e ("perf tools: Move everything related to sys_perf_event_open() to perf-sys.h")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lore.kernel.org/bpf/20191001113307.27796-2-bjorn.topel@gmail.com
5 years agonetdevsim: Fix use-after-free during device dismantle
Ido Schimmel [Thu, 31 Oct 2019 16:20:30 +0000 (18:20 +0200)]
netdevsim: Fix use-after-free during device dismantle

Commit da58f90f11f5 ("netdevsim: Add devlink-trap support") added
delayed work to netdevsim that periodically iterates over the registered
netdevsim ports and reports various packet traps via devlink.

While the delayed work takes the 'port_list_lock' mutex to protect
against concurrent addition / deletion of ports, during device creation
/ dismantle ports are added / deleted without this lock, which can
result in a use-after-free [1].

Fix this by making sure that the ports list is always modified under the
lock.

[1]
[   59.205543] ==================================================================
[   59.207748] BUG: KASAN: use-after-free in nsim_dev_trap_report_work+0xa67/0xad0
[   59.210247] Read of size 8 at addr ffff8883cbdd3398 by task kworker/3:1/38
[   59.212584]
[   59.213148] CPU: 3 PID: 38 Comm: kworker/3:1 Not tainted 5.4.0-rc3-custom-16119-ge6abb5f0261e #2013
[   59.215896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20180724_192412-buildhw-07.phx2.fedoraproject.org-1.fc29 04/01/2014
[   59.218384] Workqueue: events nsim_dev_trap_report_work
[   59.219428] Call Trace:
[   59.219924]  dump_stack+0xa9/0x10e
[   59.220623]  print_address_description.constprop.4+0x21/0x340
[   59.221976]  ? vprintk_func+0x66/0x240
[   59.222752]  __kasan_report.cold.8+0x78/0x91
[   59.223602]  ? nsim_dev_trap_report_work+0xa67/0xad0
[   59.224603]  kasan_report+0xe/0x20
[   59.225296]  nsim_dev_trap_report_work+0xa67/0xad0
[   59.226435]  ? rcu_read_lock_sched_held+0xaf/0xe0
[   59.227512]  ? trace_event_raw_event_rcu_quiescent_state_report+0x360/0x360
[   59.228851]  process_one_work+0x98f/0x1760
[   59.229684]  ? pwq_dec_nr_in_flight+0x330/0x330
[   59.230656]  worker_thread+0x91/0xc40
[   59.231587]  ? process_one_work+0x1760/0x1760
[   59.232451]  kthread+0x34a/0x410
[   59.233104]  ? __kthread_queue_delayed_work+0x240/0x240
[   59.234141]  ret_from_fork+0x3a/0x50
[   59.234982]
[   59.235371] Allocated by task 187:
[   59.236189]  save_stack+0x19/0x80
[   59.236853]  __kasan_kmalloc.constprop.5+0xc1/0xd0
[   59.237822]  kmem_cache_alloc_trace+0x14c/0x380
[   59.238769]  __nsim_dev_port_add+0xaf/0x5c0
[   59.239627]  nsim_dev_probe+0x4fc/0x1140
[   59.240550]  really_probe+0x264/0xc00
[   59.241418]  driver_probe_device+0x208/0x2e0
[   59.242255]  __device_attach_driver+0x215/0x2d0
[   59.243150]  bus_for_each_drv+0x154/0x1d0
[   59.243944]  __device_attach+0x1ba/0x2b0
[   59.244923]  bus_probe_device+0x1dd/0x290
[   59.245805]  device_add+0xbac/0x1550
[   59.246528]  new_device_store+0x1f4/0x400
[   59.247306]  bus_attr_store+0x7b/0xa0
[   59.248047]  sysfs_kf_write+0x10f/0x170
[   59.248941]  kernfs_fop_write+0x283/0x430
[   59.249843]  __vfs_write+0x81/0x100
[   59.250546]  vfs_write+0x1ce/0x510
[   59.251190]  ksys_write+0x104/0x200
[   59.251873]  do_syscall_64+0xa4/0x4e0
[   59.252642]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.253837]
[   59.254203] Freed by task 187:
[   59.254811]  save_stack+0x19/0x80
[   59.255463]  __kasan_slab_free+0x125/0x170
[   59.256265]  kfree+0x100/0x440
[   59.256870]  nsim_dev_remove+0x98/0x100
[   59.257651]  nsim_bus_remove+0x16/0x20
[   59.258382]  device_release_driver_internal+0x20b/0x4d0
[   59.259588]  bus_remove_device+0x2e9/0x5a0
[   59.260551]  device_del+0x410/0xad0
[   59.263777]  device_unregister+0x26/0xc0
[   59.264616]  nsim_bus_dev_del+0x16/0x60
[   59.265381]  del_device_store+0x2d6/0x3c0
[   59.266295]  bus_attr_store+0x7b/0xa0
[   59.267192]  sysfs_kf_write+0x10f/0x170
[   59.267960]  kernfs_fop_write+0x283/0x430
[   59.268800]  __vfs_write+0x81/0x100
[   59.269551]  vfs_write+0x1ce/0x510
[   59.270252]  ksys_write+0x104/0x200
[   59.270910]  do_syscall_64+0xa4/0x4e0
[   59.271680]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   59.272812]
[   59.273211] The buggy address belongs to the object at ffff8883cbdd3200
[   59.273211]  which belongs to the cache kmalloc-512 of size 512
[   59.275838] The buggy address is located 408 bytes inside of
[   59.275838]  512-byte region [ffff8883cbdd3200ffff8883cbdd3400)
[   59.278151] The buggy address belongs to the page:
[   59.279215] page:ffffea000f2f7400 refcount:1 mapcount:0 mapping:ffff8883ecc0ce00 index:0x0 compound_mapcount: 0
[   59.281449] flags: 0x200000000010200(slab|head)
[   59.282356] raw: 0200000000010200 ffffea000f2f3a08 ffffea000f2fd608 ffff8883ecc0ce00
[   59.283949] raw: 0000000000000000 0000000000150015 00000001ffffffff 0000000000000000
[   59.285608] page dumped because: kasan: bad access detected
[   59.286981]
[   59.287337] Memory state around the buggy address:
[   59.288310]  ffff8883cbdd3280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   59.289763]  ffff8883cbdd3300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   59.291452] >ffff8883cbdd3380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   59.292945]                             ^
[   59.293815]  ffff8883cbdd3400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   59.295220]  ffff8883cbdd3480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   59.296872] ==================================================================

Fixes: da58f90f11f5 ("netdevsim: Add devlink-trap support")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: syzbot+9ed8f68ab30761f3678e@syzkaller.appspotmail.com
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorxrpc: Fix handling of last subpacket of jumbo packet
David Howells [Thu, 31 Oct 2019 12:13:46 +0000 (12:13 +0000)]
rxrpc: Fix handling of last subpacket of jumbo packet

When rxrpc_recvmsg_data() sets the return value to 1 because it's drained
all the data for the last packet, it checks the last-packet flag on the
whole packet - but this is wrong, since the last-packet flag is only set on
the final subpacket of the last jumbo packet.  This means that a call that
receives its last packet in a jumbo packet won't complete properly.

Fix this by having rxrpc_locate_data() determine the last-packet state of
the subpacket it's looking at and passing that back to the caller rather
than having the caller look in the packet header.  The caller then needs to
cache this in the rxrpc_call struct as rxrpc_locate_data() isn't then
called again for this packet.

Fixes: 248f219cb8bc ("rxrpc: Rewrite the data and ack handling code")
Fixes: e2de6c404898 ("rxrpc: Use info in skbuff instead of reparsing a jumbo packet")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'mac80211-for-net-2019-10-31' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Thu, 31 Oct 2019 18:43:36 +0000 (11:43 -0700)]
Merge tag 'mac80211-for-net-2019-10-31' of git://git./linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Just two fixes:
 * HT operation is not allowed on channel 14 (Japan only)
 * netlink policy for nexthop attribute was wrong
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoiocost: don't nest spin_lock_irq in ioc_weight_write()
Dan Carpenter [Thu, 31 Oct 2019 10:53:41 +0000 (13:53 +0300)]
iocost: don't nest spin_lock_irq in ioc_weight_write()

This code causes a static analysis warning:

    block/blk-iocost.c:2113 ioc_weight_write() error: double lock 'irq'

We disable IRQs in blkg_conf_prep() and re-enable them in
blkg_conf_finish().  IRQ disable/enable should not be nested because
that means the IRQs will be enabled at the first unlock instead of the
second one.

Fixes: 7caa47151ab2 ("blkcg: implement blk-iocost")
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
5 years agoarm64: cpufeature: Enable Qualcomm Falkor errata 1009 for Kryo
Bjorn Andersson [Tue, 29 Oct 2019 23:27:38 +0000 (16:27 -0700)]
arm64: cpufeature: Enable Qualcomm Falkor errata 1009 for Kryo

The Kryo cores share errata 1009 with Falkor, so add their model
definitions and enable it for them as well.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[will: Update entry in silicon-errata.rst]
Signed-off-by: Will Deacon <will@kernel.org>
5 years agoKVM: vmx, svm: always run with EFER.NXE=1 when shadow paging is active
Paolo Bonzini [Sun, 27 Oct 2019 15:23:23 +0000 (16:23 +0100)]
KVM: vmx, svm: always run with EFER.NXE=1 when shadow paging is active

VMX already does so if the host has SMEP, in order to support the combination of
CR0.WP=1 and CR4.SMEP=1.  However, it is perfectly safe to always do so, and in
fact VMX already ends up running with EFER.NXE=1 on old processors that lack the
"load EFER" controls, because it may help avoiding a slow MSR write.  Removing
all the conditionals simplifies the code.

SVM does not have similar code, but it should since recent AMD processors do
support SMEP.  So this patch also makes the code for the two vendors more similar
while fixing NPT=0, CR0.WP=1 and CR4.SMEP=1 on AMD processors.

Cc: stable@vger.kernel.org
Cc: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: call kvm_arch_destroy_vm if vm creation fails
Jim Mattson [Fri, 25 Oct 2019 11:34:58 +0000 (13:34 +0200)]
kvm: call kvm_arch_destroy_vm if vm creation fails

In kvm_create_vm(), if we've successfully called kvm_arch_init_vm(), but
then fail later in the function, we need to call kvm_arch_destroy_vm()
so that it can do any necessary cleanup (like freeing memory).

Fixes: 44a95dae1d229a ("KVM: x86: Detect and Initialize AVIC support")
Signed-off-by: John Sperbeck <jsperbeck@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Junaid Shahid <junaids@google.com>
[Remove dependency on "kvm: Don't clear reference count on
 kvm_create_vm() error path" which was not committed. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoefi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN
Javier Martinez Canillas [Tue, 29 Oct 2019 17:37:55 +0000 (18:37 +0100)]
efi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN

The driver exposes EFI runtime services to user-space through an IOCTL
interface, calling the EFI services function pointers directly without
using the efivar API.

Disallow access to the /dev/efi_test character device when the kernel is
locked down to prevent arbitrary user-space to call EFI runtime services.

Also require CAP_SYS_ADMIN to open the chardev to prevent unprivileged
users to call the EFI runtime services, instead of just relying on the
chardev file mode bits for this.

The main user of this driver is the fwts [0] tool that already checks if
the effective user ID is 0 and fails otherwise. So this change shouldn't
cause any regression to this tool.

[0]: https://wiki.ubuntu.com/FirmwareTestSuite/Reference/uefivarinfo

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Matthew Garrett <mjg59@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: https://lkml.kernel.org/r/20191029173755.27149-7-ardb@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>