linux-toradex.git, branch v4.9.45

Linux 4.9.45

2017-08-25T00:12:55+00:00

usb: qmi_wwan: add D-Link DWM-222 device ID

2017-08-25T00:12:21+00:00

commit bed9ff165960921303a100228585f2d1691b42eb upstream.

Signed-off-by: Hector Martin 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

usb: optimize acpi companion search for usb port devices

2017-08-25T00:12:21+00:00

commit ed18c5fa945768a9bec994e786edbbbc7695acf6 upstream.

This optimization significantly reduces xhci driver load time.

In ACPI tables the acpi companion port devices are children of
the hub device. The port devices are identified by their port number
returned by the ACPI _ADR method.
_ADR 0 is reserved for the root hub device.

The current implementation to find a acpi companion port device
loops through all acpi port devices under that parent hub, evaluating
their _ADR method each time a new port device is added.

for a xHC controller with 25 ports under its roothub it
will end up invoking ACPI bytecode 625 times before all ports
are ready, making it really slow.

The _ADR values are already read and cached earler. So instead of
running the bytecode again we can check the cached _ADR value first,
and then fall back to the old way.

As one of the more significant changes, the xhci load time on
Intel kabylake reduced by 70%, (28ms) from
initcall xhci_pci_init+0x0/0x49 returned 0 after 39537 usecs
to
initcall xhci_pci_init+0x0/0x49 returned 0 after 11270 usecs

Signed-off-by: Mathias Nyman 
Signed-off-by: Greg Kroah-Hartman

pids: make task_tgid_nr_ns() safe

2017-08-25T00:12:21+00:00

commit dd1c1f2f2028a7b851f701fc6a8ebe39dcb95e7c upstream.

This was reported many times, and this was even mentioned in commit
52ee2dfdd4f5 ("pids: refactor vnr/nr_ns helpers to make them safe") but
somehow nobody bothered to fix the obvious problem: task_tgid_nr_ns() is
not safe because task->group_leader points to nowhere after the exiting
task passes exit_notify(), rcu_read_lock() can not help.

We really need to change __unhash_process() to nullify group_leader,
parent, and real_parent, but this needs some cleanups.  Until then we
can turn task_tgid_nr_ns() into another user of __task_pid_nr_ns() and
fix the problem.

Reported-by: Troy Kensinger 
Signed-off-by: Oleg Nesterov 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

Sanitize 'move_pages()' permission checks

2017-08-25T00:12:21+00:00

commit 197e7e521384a23b9e585178f3f11c9fa08274b9 upstream.

The 'move_paghes()' system call was introduced long long ago with the
same permission checks as for sending a signal (except using
CAP_SYS_NICE instead of CAP_SYS_KILL for the overriding capability).

That turns out to not be a great choice - while the system call really
only moves physical page allocations around (and you need other
capabilities to do a lot of it), you can check the return value to map
out some the virtual address choices and defeat ASLR of a binary that
still shares your uid.

So change the access checks to the more common 'ptrace_may_access()'
model instead.

This tightens the access checks for the uid, and also effectively
changes the CAP_SYS_NICE check to CAP_SYS_PTRACE, but it's unlikely that
anybody really _uses_ this legacy system call any more (we hav ebetter
NUMA placement models these days), so I expect nobody to notice.

Famous last words.

Reported-by: Otto Ebeling 
Acked-by: Eric W. Biederman 
Cc: Willy Tarreau 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

genirq/ipi: Fixup checks against nr_cpu_ids

2017-08-25T00:12:21+00:00

commit 8fbbe2d7cc478d1544f41f2271787c993c23a4f6 upstream.

Valid CPU ids are [0, nr_cpu_ids-1] inclusive.

Fixes: 3b8e29a82dd1 ("genirq: Implement ipi_send_mask/single()")
Fixes: f9bce791ae2a ("genirq: Add a new function to get IPI reverse mapping")
Signed-off-by: Alexey Dobriyan 
Signed-off-by: Thomas Gleixner 
Link: http://lkml.kernel.org/r/20170819095751.GB27864@avx2
Signed-off-by: Greg Kroah-Hartman

genirq: Restore trigger settings in irq_modify_status()

2017-08-25T00:12:20+00:00

commit e8f241893dfbbebe2813c01eac54f263e6a5e59c upstream.

irq_modify_status starts by clearing the trigger settings from
irq_data before applying the new settings, but doesn't restore them,
leaving them to IRQ_TYPE_NONE.

That's pretty confusing to the potential request_irq() that could
follow. Instead, snapshot the settings before clearing them, and restore
them if the irq_modify_status() invocation was not changing the trigger.

Fixes: 1e2a7d78499e ("irqdomain: Don't set type when mapping an IRQ")
Reported-and-tested-by: jeffy 
Signed-off-by: Marc Zyngier 
Signed-off-by: Thomas Gleixner 
Cc: Jon Hunter 
Link: http://lkml.kernel.org/r/20170818095345.12378-1-marc.zyngier@arm.com
Signed-off-by: Greg Kroah-Hartman

irqchip/atmel-aic: Fix unbalanced refcount in aic_common_rtc_irq_fixup()

2017-08-25T00:12:20+00:00

commit 277867ade8262583f4280cadbe90e0031a3706a7 upstream.

of_find_compatible_node() is calling of_node_put() on its first argument
thus leading to an unbalanced of_node_get/put() issue if the node has not
been retained before that.

Instead of passing the root node, pass NULL, which does exactly the same:
iterate over all DT nodes, starting from the root node.

Signed-off-by: Boris Brezillon 
Reported-by: Alexandre Belloni 
Fixes: 3d61467f9bab ("irqchip: atmel-aic: Implement RTC irq fixup")
Signed-off-by: Marc Zyngier 
Signed-off-by: Greg Kroah-Hartman

irqchip/atmel-aic: Fix unbalanced of_node_put() in aic_common_irq_fixup()

2017-08-25T00:12:20+00:00

commit 469bcef53c546bb792aa66303933272991b7831d upstream.

aic_common_irq_fixup() is calling twice of_node_put() on the same node
thus leading to an unbalanced refcount on the root node.

Signed-off-by: Boris Brezillon 
Reported-by: Alexandre Belloni 
Fixes: b2f579b58e93 ("irqchip: atmel-aic: Add irq fixup infrastructure")
Signed-off-by: Marc Zyngier 
Signed-off-by: Greg Kroah-Hartman

x86/asm/64: Clear AC on NMI entries

2017-08-25T00:12:20+00:00

commit e93c17301ac55321fc18e0f8316e924e58a83c8c upstream.

This closes a hole in our SMAP implementation.

This patch comes from grsecurity. Good catch!

Signed-off-by: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/314cc9f294e8f14ed85485727556ad4f15bb1659.1502159503.git.luto@kernel.org
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman