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We're seeing a lot of bogus backlight interfaces on newer machines without
a LCD such as desktops, servers and HDMI sticks. This causes userspace to
show a non-functional brightness slider in e.g. the GNOME3 system menu,
which is undesirable. And, in general, we should simply just not register
a non functional backlight interface.
Checking the LCD flag causes the bogus acpi_video backlight interfaces to
go away (on the machines this was tested on).
This change sets the lcd_only option by default on any machines which
are Win8-ready, to fix this.
This is not entirely without a risk of regressions, but video_detect.c
already prefers native-backlight interfaces over the acpi_video one
on Win8-ready machines, calling acpi_video_unregister_backlight() as soon
as a native interface shows up. This is done because the ACPI backlight
interface often is broken on Win8-ready machines, because win8 does not
seem to actually use it.
So in practice we already end up not registering the ACPI backlight
interface on (most) Win8-ready machines with a LCD panel, thus this
change does not change anything for (most) machines with a LCD panel
and on machines without a LCD panel we actually don't want to register
any backlight interfaces.
This has been tested on the following machines and fixes a bogus backlight
interface showing up there:
- Desktop with an Asrock B150M Pro4S/D3 m.b. using i5-6500 builtin gfx
- Intel Compute Stick STK1AW32SC
- Meegopad T08 HDMI stick
Bogus backlight interfaces have also been reported on:
- Desktop with Asus H87I-Plus m.b.
- Desktop with ASRock B75M-ITX m.b.
- Desktop with Gigabyte Z87-D3HP m.b.
- Dell PowerEdge T20 desktop
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1097436
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1133327
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1133329
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1133646
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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As per note in 5.2.9 Fixed ACPI Description Table (FADT) chapter of ACPI
specification, on HW-reduced platforma OSPM should ignore fields related
to the ACPI HW register interface, one of which is SCI_INT.
Follow the spec and ignore any configuration done for interrupt line
defined by SCI_INT if FADT specifies a HW-reduced platform.
HW-reduced platforms will still be able to use SCI in case it provides
an override record in MADT table.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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0 is valid hardware interrupt which might be in some cases overridden.
Due to this, switch to INVALID_ACPI_IRQ to mark SCI override not set.
While here, change the type of the variable from int to u32 to match
the GSI type used in the rest of the code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Commit 49e4b84333f3 (ACPI: Use correct IRQ when uninstalling ACPI
interrupt handler) brings a new definition for invalid ACPI IRQ,
i.e. INVALID_ACPI_IRQ, which is defined to 0xffffffff (or -1 for
unsigned value).
Get rid of a former one, which was brought in by commit 2c0a6894df19
(x86, ACPI, irq: Enhance error handling in function acpi_register_gsi()),
in favour of latter.
To clarify the rationale of changing from INT_MIN to ((unsigned)-1)
definition consider the following:
- IRQ 0 is valid one in hardware, so, better not to use it everywhere
(Linux uses 0 as NO IRQ, though it's another story)
- INT_MIN splits the range into two, while 0xffffffff reserves only the
last item
- when type casting is done in most cases 0xff, 0xffff is naturally used
as a marker of invalid HW IRQ: for example PCI INT line 0xff means
no IRQ assigned by BIOS
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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For better readability compare input to something considered settled
down. Additionally move it to one line (while it's slightly longer
80 characters it makes readability better).
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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There are two consumers of apic=: the APIC debug level and the low
level generic architecture code, but Linux just documented the first
one.
Append the second description.
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: peterz@infradead.org
Cc: rdunlap@infradead.org
Cc: corbet@lwn.net
Link: https://lkml.kernel.org/r/20171204040313.24824-2-douly.fnst@cn.fujitsu.com
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There are two consumers of apic=:
apic_set_verbosity() for setting the APIC debug level;
parse_apic() for registering APIC driver by hand.
X86-32 supports both of them, but sometimes, kernel issues a weird warning.
eg: when kernel was booted up with 'apic=bigsmp' in command line,
early_param would warn like that:
...
[ 0.000000] APIC Verbosity level bigsmp not recognised use apic=verbose or apic=debug
[ 0.000000] Malformed early option 'apic'
...
Wrap the warning code in CONFIG_X86_64 case to avoid this.
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: peterz@infradead.org
Cc: rdunlap@infradead.org
Cc: corbet@lwn.net
Link: https://lkml.kernel.org/r/20171204040313.24824-1-douly.fnst@cn.fujitsu.com
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An interrupt storm on a bad interrupt will cause the kernel
log to be clogged.
[ 60.089234] ->handle_irq(): ffffffffbe2f803f,
[ 60.090455] 0xffffffffbf2af380
[ 60.090510] handle_bad_irq+0x0/0x2e5
[ 60.090522] ->irq_data.chip(): ffffffffbf2af380,
[ 60.090553] IRQ_NOPROBE set
[ 60.090584] ->handle_irq(): ffffffffbe2f803f,
[ 60.090590] handle_bad_irq+0x0/0x2e5
[ 60.090596] ->irq_data.chip(): ffffffffbf2af380,
[ 60.090602] 0xffffffffbf2af380
[ 60.090608] ->action(): (null)
[ 60.090779] handle_bad_irq+0x0/0x2e5
This was seen when running an upstream kernel on Acer Chromebook R11. The
system was unstable as result.
Guard the log message with __printk_ratelimit to reduce the impact. This
won't prevent the interrupt storm from happening, but at least the system
remains stable.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dmitry Torokhov <dtor@chromium.org>
Cc: Joe Perches <joe@perches.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=197953
Link: https://lkml.kernel.org/r/1512234784-21038-1-git-send-email-linux@roeck-us.net
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Since the recent remote cpufreq callback work, its possible that a cpufreq
update is triggered from a remote CPU. For single policies however, the current
code uses the local CPU when trying to determine if the remote sg_cpu entered
idle or is busy. This is incorrect. To remedy this, compare with the nohz tick
idle_calls counter of the remote CPU.
Fixes: 674e75411fc2 (sched: cpufreq: Allow remote cpufreq callbacks)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Joel Fernandes <joelaf@google.com>
Cc: 4.14+ <stable@vger.kernel.org> # 4.14+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The IRQ code already has support for lockdep class for the lock mutex
in an interrupt descriptor. Extend this to add a second class for the
request mutex in the descriptor. Not having a class is resulting in
false positive splats in some code paths.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: linus.walleij@linaro.org
Cc: grygorii.strashko@ti.com
Cc: f.fainelli@gmail.com
Link: https://lkml.kernel.org/r/1512234664-21555-1-git-send-email-andrew@lunn.ch
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Add support for a new ISSI 1MB SPI NOR chip that was tested in our lab.
Datasheet is available at: http://www.issi.com/WW/pdf/25LP-WP080D.pdf
Testing was done only without the SPI_NOR_{DUAL,QUAD}_READ flags that
were added later, according to the datasheet.
Tested-by: Pascal Fabreges <pascal.fabreges@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Romain Porte <romain.porte@nokia.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Daniel Borkmann says:
====================
pull-request: bpf 2017-12-28
The following pull-request contains BPF updates for your *net* tree.
The main changes are:
1) Two small fixes for bpftool. Fix otherwise broken output if any of
the system calls failed when listing maps in json format and instead
of bailing out, skip maps or progs that disappeared between fetching
next id and getting an fd for that id, both from Jakub.
2) Small fix in BPF selftests to respect LLC passed from command line
when testing for -mcpu=probe presence, from Quentin.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit v4.12-rc4-1-g9289ea7f952b introduced a mistake that made the
64-bit hweight stub call the 16-bit hweight function.
Fixes: 9289ea7f952b ("sparc64: Use indirect calls in hamming weight stubs")
Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ibmr.device is being set only after ib_alloc_mr() is
(successfully) complete. Therefore, in case mlx5_core_create_mkey()
return with error, the error flow calls mlx5_free_priv_descs()
which uses ibmr.device (which doesn't exist yet), causing
a NULL dereference oops.
To fix this, the IB device should be set in the mr struct earlier
stage (e.g. prior to calling mlx5_core_create_mkey()).
Fixes: 8a187ee52b04 ("IB/mlx5: Support the new memory registration API")
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Nitzan Carmi <nitzanc@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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The XRC target QP create flow sets up qp_sec only if there is an IB link with
LSM security enabled. However, several other related uAPI entry points blindly
follow the qp_sec NULL pointer, resulting in a possible oops.
Check for NULL before using qp_sec.
Cc: <stable@vger.kernel.org> # v4.12
Fixes: d291f1a65232 ("IB/core: Enforce PKey security on QPs")
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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If the input command length is larger than the kernel supports an error should
be returned in case the unsupported bytes are not cleared, instead of the
other way aroudn. This matches what all other callers of ib_is_udata_cleared
do and will avoid user ABI problems in the future.
Cc: <stable@vger.kernel.org> # v4.10
Fixes: 189aba99e700 ("IB/uverbs: Extend modify_qp and support packet pacing")
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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User-space applications can do mmap and munmap directly at
any time.
Since the VMA list is not protected with a mutex, concurrent
accesses to the VMA list from the mmap and munmap can cause
data corruption. Add a mutex around the list.
Cc: <stable@vger.kernel.org> # v4.7
Fixes: 7c2344c3bbf9 ("IB/mlx5: Implements disassociate_ucontext API")
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"While doing tests on tracing over the network, I found that the
packets were getting corrupted.
In the process I found three bugs.
One was the culprit, but the other two scared me. After deeper
investigation, they were not as major as I thought they were, due to a
signed compared to an unsigned that prevented a negative number from
doing actual harm.
The two bigger bugs:
- Mask the ring buffer data page length. There are data flags at the
high bits of the length field. These were not cleared via the
length function, and the length could return a negative number.
(Although the number returned was unsigned, but was assigned to a
signed number) Luckily, this value was compared to PAGE_SIZE which
is unsigned and kept it from entering the path that could have
caused damage.
- Check the page usage before reusing the ring buffer reader page.
TCP increments the page ref when passing the page off to the
network. The page is passed back to the ring buffer for use on
free. But the page could still be in use by the TCP stack.
Minor bugs:
- Related to the first bug. No need to clear out the unused ring
buffer data before sending to user space. It is now done by the
ring buffer code itself.
- Reset pointers after free on error path. There were some cases in
the error path that pointers were freed but not set to NULL, and
could have them freed again, having a pointer freed twice"
* tag 'trace-v4.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Fix possible double free on failure of allocating trace buffer
tracing: Fix crash when it fails to alloc ring buffer
ring-buffer: Do no reuse reader page if still in use
tracing: Remove extra zeroing out of the ring buffer page
ring-buffer: Mask out the info bits when returning buffer page length
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"It seems that Santa overslept with a bunch of gifts; the majority of
changes here are various device-specific ASoC fixes, most notably the
revert of rcar IOMMU support and fsl_ssi AC97 fixes, but also lots of
small fixes for codecs. Besides that, the usual HD-audio quirks and
fixes are included, too"
* tag 'sound-4.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (31 commits)
ALSA: hda - Fix missing COEF init for ALC225/295/299
ALSA: hda: Drop useless WARN_ON()
ALSA: hda - change the location for one mic on a Lenovo machine
ALSA: hda - fix headset mic detection issue on a Dell machine
ALSA: hda - Add MIC_NO_PRESENCE fixup for 2 HP machines
ASoC: rsnd: fixup ADG register mask
ASoC: rt5514-spi: only enable wakeup when fully initialized
ASoC: nau8825: fix issue that pop noise when start capture
ASoC: rt5663: Fix the wrong result of the first jack detection
ASoC: rsnd: ssi: fix race condition in rsnd_ssi_pointer_update
ASoC: Intel: Change kern log level to avoid unwanted messages
ASoC: atmel-classd: select correct Kconfig symbol
ASoC: wm_adsp: Fix validation of firmware and coeff lengths
ASoC: Intel: Skylake: Do not check dev_type for dmic link type
ASoC: rockchip: disable clock on error
ASoC: tlv320aic31xx: Fix GPIO1 register definition
ASoC: codecs: msm8916-wcd: Fix supported formats
ASoC: fsl_asrc: Fix typo in a field define
ASoC: rsnd: ssiu: clear SSI_MODE for non TDM Extended modes
ASoC: da7218: Correct IRQ level in DT binding example
...
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They are exactly the same as the s25fl064l but bigger.
Signed-off-by: Rafael Gago Castano <rgc@hms.se>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Commit e802a51ede91 ("x86/idt: Consolidate IDT invalidation") cleaned up
and unified the IDT invalidation that existed in a couple of places. It
changed no actual real code.
Despite not changing any actual real code, it _did_ change code generation:
by implementing the common idt_invalidate() function in
archx86/kernel/idt.c, it made the use of the function in
arch/x86/kernel/machine_kexec_32.c be a real function call rather than an
(accidental) inlining of the function.
That, in turn, exposed two issues:
- in load_segments(), we had incorrectly reset all the segment
registers, which then made the stack canary load (which gcc does
using offset of %gs) cause a trap. Instead of %gs pointing to the
stack canary, it will be the normal zero-based kernel segment, and
the stack canary load will take a page fault at address 0x14.
- to make this even harder to debug, we had invalidated the GDT just
before calling idt_invalidate(), which meant that the fault happened
with an invalid GDT, which in turn causes a triple fault and
immediate reboot.
Fix this by
(a) not reloading the special segments in load_segments(). We currently
don't do any percpu accesses (which would require %fs on x86-32) in
this area, but there's no reason to think that we might not want to
do them, and like %gs, it's pointless to break it.
(b) doing idt_invalidate() before invalidating the GDT, to keep things
at least _slightly_ more debuggable for a bit longer. Without a
IDT, traps will not work. Without a GDT, traps also will not work,
but neither will any segment loads etc. So in a very real sense,
the GDT is even more core than the IDT.
Fixes: e802a51ede91 ("x86/idt: Consolidate IDT invalidation")
Reported-and-tested-by: Alexandru Chirvasitu <achirvasub@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/alpine.LFD.2.21.1712271143180.8572@i7.lan
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With the current code, the following sequence won't work :
echo timer > trigger
echo 0 > delay_off
* at this point we call
** led_delay_off_store
** led_blink_set
*** stop timer
** led_blink_setup
** led_set_software_blink
*** if !delay_on, led off
*** if !delay_off, set led_set_brightness_nosleep <--- LED_BLINK_SW is set but timer is stop
*** otherwise start timer/set LED_BLINK_SW flag
echo xxx > brightness
* led_set_brightness
** if LED_BLINK_SW
*** if brightness=0, led off
*** else apply brightness if next timer <--- timer is stop, and will never apply new setting
** otherwise set led_set_brightness_nosleep
To fix that, when we delete the timer, we should clear LED_BLINK_SW.
Cc: linux-leds@vger.kernel.org
Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
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Commit e37e43a497d5 ("x86/mm/64: Enable vmapped stacks
(CONFIG_HAVE_ARCH_VMAP_STACK=y)") added prepare_switch_to with one extra
parameter which is not used by the function, remove it.
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-janitors@vger.kernel.org
Link: https://lkml.kernel.org/r/20171215131533.hp6kqebw45o7uvsb@smtp.gmail.com
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A recent commit introduced an extra merge_attr() call in the skylake
branch, which causes a memory leak.
Store the pointer to the extra allocated memory and free it at the end of
the function.
Fixes: a5df70c354c2 ("perf/x86: Only show format attributes when supported")
Reported-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <ak@linux.intel.com>
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Jing Xia and Chunyan Zhang reported that on failing to allocate part of the
tracing buffer, memory is freed, but the pointers that point to them are not
initialized back to NULL, and later paths may try to free the freed memory
again. Jing and Chunyan fixed one of the locations that does this, but
missed a spot.
Link: http://lkml.kernel.org/r/20171226071253.8968-1-chunyan.zhang@spreadtrum.com
Cc: stable@vger.kernel.org
Fixes: 737223fbca3b1 ("tracing: Consolidate buffer allocation code")
Reported-by: Jing Xia <jing.xia@spreadtrum.com>
Reported-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Double free of the ring buffer happens when it fails to alloc new
ring buffer instance for max_buffer if TRACER_MAX_TRACE is configured.
The root cause is that the pointer is not set to NULL after the buffer
is freed in allocate_trace_buffers(), and the freeing of the ring
buffer is invoked again later if the pointer is not equal to Null,
as:
instance_mkdir()
|-allocate_trace_buffers()
|-allocate_trace_buffer(tr, &tr->trace_buffer...)
|-allocate_trace_buffer(tr, &tr->max_buffer...)
// allocate fail(-ENOMEM),first free
// and the buffer pointer is not set to null
|-ring_buffer_free(tr->trace_buffer.buffer)
// out_free_tr
|-free_trace_buffers()
|-free_trace_buffer(&tr->trace_buffer);
//if trace_buffer is not null, free again
|-ring_buffer_free(buf->buffer)
|-rb_free_cpu_buffer(buffer->buffers[cpu])
// ring_buffer_per_cpu is null, and
// crash in ring_buffer_per_cpu->pages
Link: http://lkml.kernel.org/r/20171226071253.8968-1-chunyan.zhang@spreadtrum.com
Cc: stable@vger.kernel.org
Fixes: 737223fbca3b1 ("tracing: Consolidate buffer allocation code")
Signed-off-by: Jing Xia <jing.xia@spreadtrum.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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To free the reader page that is allocated with ring_buffer_alloc_read_page(),
ring_buffer_free_read_page() must be called. For faster performance, this
page can be reused by the ring buffer to avoid having to free and allocate
new pages.
The issue arises when the page is used with a splice pipe into the
networking code. The networking code may up the page counter for the page,
and keep it active while sending it is queued to go to the network. The
incrementing of the page ref does not prevent it from being reused in the
ring buffer, and this can cause the page that is being sent out to the
network to be modified before it is sent by reading new data.
Add a check to the page ref counter, and only reuse the page if it is not
being used anywhere else.
Cc: stable@vger.kernel.org
Fixes: 73a757e63114d ("ring-buffer: Return reader page back into existing ring buffer")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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The ring_buffer_read_page() takes care of zeroing out any extra data in the
page that it returns. There's no need to zero it out again from the
consumer. It was removed from one consumer of this function, but
read_buffers_splice_read() did not remove it, and worse, it contained a
nasty bug because of it.
Cc: stable@vger.kernel.org
Fixes: 2711ca237a084 ("ring-buffer: Move zeroing out excess in page to ring buffer code")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
GLK pipe C related fix, and a gvt fix.
* tag 'drm-intel-fixes-2017-12-22-1' of git://anongit.freedesktop.org/drm/drm-intel:
i915: Reject CCS modifiers for pipe C on Geminilake
drm/i915/gvt: Fix pipe A enable as default for vgpu
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Two info bits were added to the "commit" part of the ring buffer data page
when returned to be consumed. This was to inform the user space readers that
events have been missed, and that the count may be stored at the end of the
page.
What wasn't handled, was the splice code that actually called a function to
return the length of the data in order to zero out the rest of the page
before sending it up to user space. These data bits were returned with the
length making the value negative, and that negative value was not checked.
It was compared to PAGE_SIZE, and only used if the size was less than
PAGE_SIZE. Luckily PAGE_SIZE is unsigned long which made the compare an
unsigned compare, meaning the negative size value did not end up causing a
large portion of memory to be randomly zeroed out.
Cc: stable@vger.kernel.org
Fixes: 66a8cb95ed040 ("ring-buffer: Add place holder recording of dropped events")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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The patch(180d8cd942ce) replaces all uses of struct sock fields'
memory_pressure, memory_allocated, sockets_allocated, and sysctl_mem
to accessor macros. But the sockets_allocated field of sctp sock is
not replaced at all. Then replace it now for unifying the code.
Fixes: 180d8cd942ce ("foundations of per-cgroup memory pressure controlling.")
Cc: Glauber Costa <glommer@parallels.com>
Signed-off-by: Tonghao Zhang <zhangtonghao@didichuxing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix non-fatal warnings such as:
kernel/cpu.c:95:1: warning: ‘inline’ is not at beginning of declaration [-Wold-style-declaration]
static void inline cpuhp_lock_release(bool bringup) { }
^~~~~~
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Link: https://lkml.kernel.org/r/20171226140855.16583-1-malat@debian.org
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While in recovery process of PCI error (called EEH on PowerPC arch),
another PCI transaction could be corrupted causing a situation of
nested PCI errors. Also, this scenario could be reproduced with
error injection mechanisms (for debug purposes).
We observe that in case of nested PCI errors, bnx2x might attempt to
initialize its shmem and cause a kernel crash due to bad addresses
read from MCP. Multiple different stack traces were observed depending
on the point the second PCI error happens.
This patch avoids the crashes by:
* failing PCI recovery in case of nested errors (since multiple
PCI errors in a row are not expected to lead to a functional
adapter anyway), and by,
* preventing access to adapter FW when MCP is failed (we mark it as
failed when shmem cannot get initialized properly).
Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Acked-by: Shahed Shaikh <Shahed.Shaikh@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Siva Reddy Kallam says:
====================
tg3: update on copyright and couple of fixes
First patch:
Update copyright
Second patch:
Add workaround to restrict 5762 MRRS
Third patch:
Add PHY reset in change MTU path for 5720
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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A customer noticed RX path hang when MTU is changed on the fly while
running heavy traffic with NCSI enabled for 5717 and 5719. Since 5720
belongs to same ASIC family, we observed same issue and same fix
could solve this problem for 5720.
Signed-off-by: Siva Reddy Kallam <siva.kallam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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One of AMD based server with 5762 hangs with jumbo frame traffic.
This AMD platform has southbridge limitation which is restricting MRRS
to 4000. As a work around, driver to restricts the MRRS to 2048 for
this particular 5762 NX1 card.
Signed-off-by: Siva Reddy Kallam <siva.kallam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Siva Reddy Kallam <siva.kallam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec
Steffen Klassert says:
====================
pull request (net): ipsec 2017-12-22
1) Check for valid id proto in validate_tmpl(), otherwise
we may trigger a warning in xfrm_state_fini().
From Cong Wang.
2) Fix a typo on XFRMA_OUTPUT_MARK policy attribute.
From Michal Kubecek.
3) Verify the state is valid when encap_type < 0,
otherwise we may crash on IPsec GRO .
From Aviv Heller.
4) Fix stack-out-of-bounds read on socket policy lookup.
We access the flowi of the wrong address family in the
IPv4 mapped IPv6 case, fix this by catching address
family missmatches before we do the lookup.
5) fix xfrm_do_migrate() with AEAD to copy the geniv
field too. Otherwise the state is not fully initialized
and migration fails. From Antony Antony.
6) Fix stack-out-of-bounds with misconfigured transport
mode policies. Our policy template validation is not
strict enough. It is possible to configure policies
with transport mode template where the address family
of the template does not match the selectors address
family. Fix this by refusing such a configuration,
address family can not change on transport mode.
7) Fix a policy reference leak when reusing pcpu xdst
entry. From Florian Westphal.
8) Reinject transport-mode packets through tasklet,
otherwise it is possible to reate a recursion
loop. From Herbert Xu.
Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The enet IP only support 32 bit, it will use swiotlb buffer to do dma
mapping when xmit buffer DMA memory address is bigger than 4G in i.MX
platform. After stress suspend/resume test, it will print out:
log:
[12826.352864] fec 5b040000.ethernet: swiotlb buffer is full (sz: 191 bytes)
[12826.359676] DMA: Out of SW-IOMMU space for 191 bytes at device 5b040000.ethernet
[12826.367110] fec 5b040000.ethernet eth0: Tx DMA memory map failed
The issue is that the ready xmit buffers that are dma mapped but DMA still
don't copy them into fifo, once MAC restart, these DMA buffers are not unmapped.
So it should check the dma mapping buffer and unmap them.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Calling tipc_mon_delete() before the monitor has been created will oops.
This can happen in tipc_enable_bearer() error path if tipc_disc_create()
fails.
[ 48.589074] BUG: unable to handle kernel paging request at 0000000000001008
[ 48.590266] IP: tipc_mon_delete+0xea/0x270 [tipc]
[ 48.591223] PGD 1e60c5067 P4D 1e60c5067 PUD 1eb0cf067 PMD 0
[ 48.592230] Oops: 0000 [#1] SMP KASAN
[ 48.595610] CPU: 5 PID: 1199 Comm: tipc Tainted: G B 4.15.0-rc4-pc64-dirty #5
[ 48.597176] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-2.fc27 04/01/2014
[ 48.598489] RIP: 0010:tipc_mon_delete+0xea/0x270 [tipc]
[ 48.599347] RSP: 0018:ffff8801d827f668 EFLAGS: 00010282
[ 48.600705] RAX: ffff8801ee813f00 RBX: 0000000000000204 RCX: 0000000000000000
[ 48.602183] RDX: 1ffffffff1de6a75 RSI: 0000000000000297 RDI: 0000000000000297
[ 48.604373] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1dd1533
[ 48.605607] R10: ffffffff8eafbb05 R11: fffffbfff1dd1534 R12: 0000000000000050
[ 48.607082] R13: dead000000000200 R14: ffffffff8e73f310 R15: 0000000000001020
[ 48.608228] FS: 00007fc686484800(0000) GS:ffff8801f5540000(0000) knlGS:0000000000000000
[ 48.610189] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 48.611459] CR2: 0000000000001008 CR3: 00000001dda70002 CR4: 00000000003606e0
[ 48.612759] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 48.613831] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 48.615038] Call Trace:
[ 48.615635] tipc_enable_bearer+0x415/0x5e0 [tipc]
[ 48.620623] tipc_nl_bearer_enable+0x1ab/0x200 [tipc]
[ 48.625118] genl_family_rcv_msg+0x36b/0x570
[ 48.631233] genl_rcv_msg+0x5a/0xa0
[ 48.631867] netlink_rcv_skb+0x1cc/0x220
[ 48.636373] genl_rcv+0x24/0x40
[ 48.637306] netlink_unicast+0x29c/0x350
[ 48.639664] netlink_sendmsg+0x439/0x590
[ 48.642014] SYSC_sendto+0x199/0x250
[ 48.649912] do_syscall_64+0xfd/0x2c0
[ 48.650651] entry_SYSCALL64_slow_path+0x25/0x25
[ 48.651843] RIP: 0033:0x7fc6859848e3
[ 48.652539] RSP: 002b:00007ffd25dff938 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 48.654003] RAX: ffffffffffffffda RBX: 00007ffd25dff990 RCX: 00007fc6859848e3
[ 48.655303] RDX: 0000000000000054 RSI: 00007ffd25dff990 RDI: 0000000000000003
[ 48.656512] RBP: 00007ffd25dff980 R08: 00007fc685c35fc0 R09: 000000000000000c
[ 48.657697] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000d13010
[ 48.658840] R13: 00007ffd25e009c0 R14: 0000000000000000 R15: 0000000000000000
[ 48.662972] RIP: tipc_mon_delete+0xea/0x270 [tipc] RSP: ffff8801d827f668
[ 48.664073] CR2: 0000000000001008
[ 48.664576] ---[ end trace e811818d54d5ce88 ]---
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix memory leak in tipc_enable_bearer() if enable_media() fails, and
cleanup with bearer_disable() if tipc_mon_create() fails.
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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RDS currently doesn't check if the length of the control message is
large enough to hold the required data, before dereferencing the control
message data. This results in following crash:
BUG: KASAN: stack-out-of-bounds in rds_rdma_bytes net/rds/send.c:1013
[inline]
BUG: KASAN: stack-out-of-bounds in rds_sendmsg+0x1f02/0x1f90
net/rds/send.c:1066
Read of size 8 at addr ffff8801c928fb70 by task syzkaller455006/3157
CPU: 0 PID: 3157 Comm: syzkaller455006 Not tainted 4.15.0-rc3+ #161
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
print_address_description+0x73/0x250 mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report+0x25b/0x340 mm/kasan/report.c:409
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
rds_rdma_bytes net/rds/send.c:1013 [inline]
rds_sendmsg+0x1f02/0x1f90 net/rds/send.c:1066
sock_sendmsg_nosec net/socket.c:628 [inline]
sock_sendmsg+0xca/0x110 net/socket.c:638
___sys_sendmsg+0x320/0x8b0 net/socket.c:2018
__sys_sendmmsg+0x1ee/0x620 net/socket.c:2108
SYSC_sendmmsg net/socket.c:2139 [inline]
SyS_sendmmsg+0x35/0x60 net/socket.c:2134
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x43fe49
RSP: 002b:00007fffbe244ad8 EFLAGS: 00000217 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe49
RDX: 0000000000000001 RSI: 000000002020c000 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004017b0
R13: 0000000000401840 R14: 0000000000000000 R15: 0000000000000000
To fix this, we verify that the cmsg_len is large enough to hold the
data to be read, before proceeding further.
Reported-by: syzbot <syzkaller-bugs@googlegroups.com>
Signed-off-by: Avinash Repaka <avinash.repaka@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When plugging in a USB webcam I see the following message:
xhci_hcd 0000:04:00.0: WARN Successful completion on short TX: needs
XHCI_TRUST_TX_LENGTH quirk?
handle_tx_event: 913 callbacks suppressed
All is quiet again with this patch (and I've done a fair but of soak
testing with the camera since).
Cc: <stable@vger.kernel.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Trying to read from debugfs after the system has resumed from
hibernate causes a use-after-free and thus a protection fault.
Steps to reproduce:
Hibernate system, resume from hibernate, then run
$ cat /sys/kernel/debug/usb/xhci/*/command-ring/enqueue
[ 3902.765086] general protection fault: 0000 [#1] PREEMPT SMP
...
[ 3902.765136] RIP: 0010:xhci_trb_virt_to_dma.part.50+0x5/0x30
...
[ 3902.765178] Call Trace:
[ 3902.765188] xhci_ring_enqueue_show+0x1e/0x40
[ 3902.765197] seq_read+0xdb/0x3a0
[ 3902.765204] ? __handle_mm_fault+0x5fb/0x1210
[ 3902.765211] full_proxy_read+0x4a/0x70
[ 3902.765219] __vfs_read+0x23/0x120
[ 3902.765228] vfs_read+0x8e/0x130
[ 3902.765235] SyS_read+0x42/0x90
[ 3902.765242] do_syscall_64+0x6b/0x290
[ 3902.765251] entry_SYSCALL64_slow_path+0x25/0x25
The issue is caused by the xhci ring structures being reallocated
when the system is resumed, but pointers to the old structures
being retained in the debugfs files "private" field:
The proposed patch fixes this issue by storing a pointer to the xhci_ring
field in the xhci device structure in debugfs rather than directly
storing a pointer to the xhci_ring.
Fixes: 02b6fdc2a153 ("usb: xhci: Add debugfs interface for xHCI driver")
Signed-off-by: Alexander Kappner <agk@godking.net>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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|
Free the virt_device and its debugfs_private member together.
When resuming from hibernate the .free_dev callback unconditionally
freed the debugfs_private member, but could leave virt_device intact.
This triggered a NULL pointer dereference after resume when usbmuxd
sent a USBDEVFS_SETCONFIGURATION ioctl to a device, trying to add a
endpoint debugfs entry to a already freed debugfs_private pointer.
Fixes: 02b6fdc2a153 ("usb: xhci: Add debugfs interface for xHCI driver")
Reported-by: Alexander Kappner <agk@godking.net>
Tested-by: Alexander Kappner <agk@godking.net>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus
Johan writes
USB-serial fixes for v4.15-rc6
Here are some new device ids for ftdi_sio, option and qcserial.
Note that the qcserial patch enables the SetControlLineState request
(used to raise DTR/RTS) for the GPS interface of all devices using the
Sierra Wireless layout. This was required for the Sierra Wireless EM7565
and has been tested using several other modems as well.
All but the final commit have been in linux-next without any reported
issues.
Signed-off-by: Johan Hovold <johan@kernel.org>
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Add AIRBUS_DS_P8GR device IDs to ftdi_sio driver.
Signed-off-by: Max Schulze <max.schulze@posteo.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
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ALC299 is compatible with ALC225/295, thus it doesn't have to assign
its own model. Merge together with ALC225/295 code.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
|
|
Back-merge the upstream branch for applying further cleanup patches
for HD-Audio.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
|
|
There was a long-standing problem on HP Spectre X360 with Kabylake
where it lacks of the front speaker output in some situations. Also
there are other products showing the similar behavior. The culprit
seems to be the missing COEF setup on ALC codecs, ALC225/295/299,
which are all compatible.
This patch adds the proper COEF setup (to initialize idx 0x67 / bits
0x3000) for addressing the issue.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195457
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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