ppp_read() and ppp_poll() can be called concurrently with ppp_ioctl().
In this case, ppp_ioctl() might call ppp_ccp_closed(), which may update
ppp->flags while ppp_read() or ppp_poll() is reading it.
The update done by ppp_ccp_closed() isn't atomic due to the bit mask
operation ('ppp->flags &= ~(SC_CCP_OPEN | SC_CCP_UP)'), so concurrent
readers might get transient values.
Reading incorrect ppp->flags may disturb the 'ppp->flags & SC_LOOP_TRAFFIC'
test in ppp_read() and ppp_poll(), which in turn can lead to improper
decision on whether the PPP unit file is ready for reading or not.
Since ppp_ccp_closed() is protected by the Rx and Tx locks (with
ppp_lock()), taking the Rx lock is enough for ppp_read() and ppp_poll()
to guarantee that ppp_ccp_closed() won't update ppp->flags
concurrently.
The same reasoning applies to ppp->n_channels. The 'n_channels' field
can also be written to concurrently by ppp_ioctl() (through
ppp_connect_channel() or ppp_disconnect_channel()). These writes aren't
atomic (simple increment/decrement), but are protected by both the Rx
and Tx locks (like in the ppp->flags case). So holding the Rx lock
before reading ppp->n_channels also prevents concurrent writes.
Signed-off-by: Guillaume Nault <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Use list_move_tail() to move MAC address entry from list of pending
to list of active entries. Simple list_add_tail() leaves the entry
also in the first list, this leads to list corruption.
Cc: Rasesh Mody <[email protected]>
Signed-off-by: Ivan Vecera <[email protected]>
Acked-by: Rasesh Mody <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
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Merge tag 'linux-can-fixes-for-4.5-20160226' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2016-02-26
this is a pull request of one patch for net.
The patch by Maximilain Schneider fixes a kfree() problem during disconnect in
the gs_usb driver.
====================
Signed-off-by: David S. Miller <[email protected]>
The OSS sequencer client tries to drain the pending events at
releasing. Unfortunately, as spotted by syzkaller fuzzer, this may
lead to an unkillable process state when the event has been queued at
the far future. Since the process being released can't be signaled
any longer, it remains and waits for the echo-back event in that far
future.
Back to history, the draining feature was implemented at the time we
misinterpreted POSIX definition for blocking file operation.
Actually, such a behavior is superfluous at release, and we should
just release the device as is instead of keeping it up forever.
This patch just removes the draining call that may block the release
for too long time unexpectedly.
BugLink: http://lkml.kernel.org/r/CACT4Y+Y4kD-aBGj37rf-xBw9bH3GMU6P+MYg4W1e-s-paVD2pg@mail.gmail.com
Reported-by: Dmitry Vyukov <[email protected]>
Cc: <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
We want the size of the struct, not of a pointer to it. To be future
proof, just dereference the pointer to get the desired type.
Fixes: dd1aa2524b ("i2c: brcmstb: Add Broadcom settop SoC i2c controller driver")
Acked-by: Gregory Fong <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Reviewed-by: Kamal Dasu <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
Cc: [email protected]
Pull sparc fixes from David Miller:
1) System call tracing doesn't handle register contents properly across
the trace. From Mike Frysinger.
2) Hook up copy_file_range
3) Build fix for 32-bit with newer tools.
4) New sun4v watchdog driver, from Wim Coekaerts.
5) Set context system call has to allow for servicable faults when we
flush the register windows to memory
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: Fix sparc64_set_context stack handling.
sparc32: Add -Wa,-Av8 to KBUILD_CFLAGS.
Add sun4v_wdt watchdog driver
sparc: Fix system call tracing register handling.
sparc: Hook up copy_file_range syscall.
Commit 04b38d6012 ("vfs: pull btrfs clone API to vfs layer")
added a duplicated line (in cifsfs.c) which causes a sparse compile
warning.
Signed-off-by: Steve French <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
RTS/CTS needs to be enabled if the rate is a fallback rate *or* if it's
a dual-stream rate and the sta is in dynamic SMPS mode.
Cc: [email protected]
Fixes: a3ebb4e1b7 ("mac80211: minstrel_ht: handle peers in dynamic SMPS")
Reported-by: Matías Richart <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
Public Action frames use special rules for how the BSSID field (Address
3) is set. A wildcard BSSID is used in cases where the transmitter and
recipient are not members of the same BSS. As such, we need to accept
Public Action frames with wildcard BSSID.
Commit db8e173245 ("mac80211: ignore frames between TDLS peers when
operating as AP") added a rule that drops Action frames to TDLS-peers
based on an Action frame having different DA (Address 1) and BSSID
(Address 3) values. This is not correct since it misses the possibility
of BSSID being a wildcard BSSID in which case the Address 1 would not
necessarily match.
Fix this by allowing mac80211 to accept wildcard BSSID in an Action
frame when in AP mode.
Fixes: db8e173245 ("mac80211: ignore frames between TDLS peers when operating as AP")
Cc: [email protected]
Signed-off-by: Jouni Malinen <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
Just like for CCMP we need to check that for GCMP the fragments
have PNs that increment by one; the spec was updated to fix this
security issue and now has the following text:
The receiver shall discard MSDUs and MMPDUs whose constituent
MPDU PN values are not incrementing in steps of 1.
Adapt the code for CCMP to work for GCMP as well, luckily the
relevant fields already alias each other so no code duplication
is needed (just check the aliasing with BUILD_BUG_ON.)
Cc: [email protected]
Signed-off-by: Johannes Berg <[email protected]>
Plantronics DA45 does not support reading the sample rate which leads
to many lines of "cannot get freq at ep 0x4" and "cannot get freq at
ep 0x84". This patch adds the USB ID of the DA45 to quirks.c and
avoids those error messages.
Signed-off-by: Dennis Kadioglu <[email protected]>
Cc: <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
This reverts commit 0b2b093ad4.
Turns out the MOXA vendor driver was basically just a copy of the
ti_usb_3410_5052 driver. We don't want two drivers for the same chip
even if mxu11x0 had gotten some much needed clean up before merge. So
let's remove the mxu11x0 driver, add support for these Moxa devices to
the TI driver, and then clean that driver up instead.
Signed-off-by: Johan Hovold <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Like a signal return, we should use synchronize_user_stack() rather
than flush_user_windows().
Reported-by: Ilya Malakhov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Binutils used to be (erroneously) extremely permissive about
instruction usage. But that got fixed and if you don't properly tell
it to accept classes of instructions it will fail.
This uncovered a specs bug on sparc in gcc where it wouldn't pass the
proper options to binutils options.
Deal with this in the kernel build by adding -Wa,-Av8 to KBUILD_CFLAGS.
Reported-by: Al Viro <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
The firmware ctls like "DSP1 Firmware" in wm_adsp codec driver are
enum, while the current driver accesses wrongly via
value.integer.value[]. They have to be via value.enumerated.item[]
instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Cc: [email protected]
"Speaker Mode "ctl in wm9081 codec driver is enum, while the current
driver accesses wrongly via value.integer.value[]. They have to be
via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"DSP1 EQ Mode" and "DSP2 EQ Mode" ctls in wm8996 codec driver are
enum, while the current driver accesses wrongly via
value.integer.value[]. They have to be via value.enumerated.item[]
instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
The DRC Mode like "AIF1DRC1 Mode" and EQ Mode like "AIF1.1 EQ Mode" in
wm8994 codec driver are enum ctls, while the current driver accesses
wrongly via value.integer.value[]. They have to be via
value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Cc: [email protected]
"Equalizer Function" ctl in wm8985 codec driver is enum, while the
current driver accesses wrongly via value.integer.value[]. They have
to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Equalizer Function" ctl in wm8983 codec driver is enum, while the
current driver accesses wrongly via value.integer.value[]. They have
to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"MBC Mode", "VSS Mode", "VSS HPF Mode" and "Enhanced EQ Mode" ctls in
wm8958 codec driver are enum, while the current driver accesses
wrongly via value.integer.value[]. They have to be via
value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Cc: [email protected]
"DRC Mode" and "EQ Mode" ctls in wm8904 codec driver are enum, while
the current driver accesses wrongly via value.integer.value[]. They
have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"DAI Mode" ctl in wm8753 codec driver is enum, while the current
driver accesses wrongly via value.integer.value[]. They have to be
via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Codec Mode" and "Audio Switch" ctls in wl1273 codec driver are enum,
while the current driver accesses wrongly via value.integer.value[].
They have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"FIFO Mode" ctl in tlv320dac33 codec driver is enum, while the current
driver accesses wrongly via value.integer.value[]. They have to be
via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Biquad1 Mode" and "Biquad2 Mode" ctls in max98095 codec driver are
enum, while the current driver accesses wrongly via
value.integer.value[]. They have to be via value.enumerated.item[]
instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"EQ1 Mode" and "EQ2 Mode" ctls in max98088 codec driver are enum,
while the current driver accesses wrongly via value.integer.value[].
They have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Sidetone Status" and "ANC Status" ctls in ab8500 codec driver are
enum, while the current driver accesses wrongly via
value.integer.value[]. They have to be via value.enumerated.item[]
instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"DAC1 High Pass Filter Mode" & co in da732x codec driver are enum,
while the current driver accesses wrongly via value.integer.value[].
They have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"PCM channel mixer" ctl in cs42l51 codec driver is enum, while the
current driver accesses wrongly via value.integer.value[]. They have
to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Playback Switch" and "Lineout Mux" ctls in medfld machine driver are
enum, while the current driver accesses wrongly via
value.integer.value[]. They have to be via value.enumerated.item[]
instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Speaker Function", "Input Select" and "Jack Function" ctls in rx51
driver are enum, while the current driver accesses wrongly via
value.integer.value[]. They have to be via value.enumerated.item[]
instead.
Signed-off-by: Takashi Iwai <[email protected]>
Acked-by: Jarkko Nikula <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Jack Function", "Speaker Function" and "Input Select" ctls in n810
driver are enum, while the current driver accesses wrongly via
value.integer.value[]. They have to be via value.enumerated.item[]
instead.
Signed-off-by: Takashi Iwai <[email protected]>
Acked-by: Jarkko Nikula <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Jack Function" and "Speaker Function" ctls in tosa are enum, while
the current driver accesses wrongly via value.integer.value[]. They
have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Jack Function" and "Speaker Function" ctls in spitz are enum, while
the current driver accesses wrongly via value.integer.value[]. They
have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Jack Function" and "Speaker Function" ctls in poodle are enum, while
the current driver accesses wrongly via value.integer.value[]. They
have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Input Select" ctl in magician driver is an enum, while the current
driver accesses wrongly via value.integer.value[]. They have to be
via value.enumerated.item[] instead.
(Meanwhile "Headphone Switch" and "Speaker Switch" are boolean, so
they should stay to access via value.integer.value[] as is.)
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
"Jack Function" and "Speaker Function" ctls in corgi are enum, while
the current driver accesses wrongly via value.integer.value[]. They
have to be via value.enumerated.item[] instead.
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
snd_soc_dapm_dai_link_get() and _put() access the associated ctl
values as value.integer.value[]. However, this is an enum ctl, and it
has to be accessed via value.enumerated.item[]. The former is long
while the latter is unsigned int, so they don't align.
Fixes: c66150824b ('ASoC: dapm: add code to configure dai link parameters')
Cc: <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
commit 0973128002
Author: Imre Deak <[email protected]>
Date: Wed Feb 17 14:17:42 2016 +0200
drm/i915: Add helper to get a display power ref if it was already enabled
left the rpm wakelock assertions unbalanced if CONFIG_PM was disabled as
intel_runtime_pm_get_if_in_use() would return true without incrementing
the local bookkeeping required for the assertions.
Signed-off-by: Chris Wilson <[email protected]>
CC: Mika Kuoppala <[email protected]>
CC: Joonas Lahtinen <[email protected]>
CC: Ville Syrjälä <[email protected]>
Reviewed-by: Imre Deak <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
The MT8173 cpufreq driver can currently only be built-in, but
it has a Kconfig dependency on the thermal core. THERMAL
can be a loadable module, which in turn makes this driver
impossible to build.
It is nicer to make the cpufreq driver a module as well, so
this patch turns the option in to a 'tristate' and adapts
the dependency accordingly.
The driver has no module_exit() function, so it will continue
to not support unloading, but it can be built as a module
and loaded at runtime now.
Signed-off-by: Arnd Bergmann <[email protected]>
Fixes: 5269e7067c (cpufreq: Add ARM_MT8173_CPUFREQ dependency on THERMAL)
Signed-off-by: Rafael J. Wysocki <[email protected]>
My previous patch to avoid link errors with the qoriq cpufreq
driver disallowed all of the broken cases, but also prevented
the driver from being built when CONFIG_THERMAL is a module.
This changes the dependency to allow the cpufreq driver to
also be a module in this case, just not built-in.
Signed-off-by: Arnd Bergmann <[email protected]>
Fixes: 8ae1702a0d (cpufreq: qoriq: Register cooling device based on device tree)
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
In case of failure returned from query function in
IB device registration, we need to clean IB cache which
was missed.
This change fixes it.
Fixes: 3e153a93a1 ('IB/core: Save the device attributes on the device
structure')
Signed-off-by: Leon Romanovsky <[email protected]>
Reviewed-by: Ira Weiny <[email protected]>
Reviewed-by: Sagi Grimberg <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
Some kinds of Layerscape PCIe controllers will forward the received message
TLPs to system application address space, which could corrupt system memory
or lead to a system hang. Enable MSG_DROP to fix this issue.
Signed-off-by: Minghuan Lian <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Commit cbce790059 ("PCI: designware: Make driver arch-agnostic") changed
the host bridge sysdata pointer from the ARM pci_sys_data to the DesignWare
pcie_port structure, and changed pcie-designware.c to reflect that. But it
did not change the corresponding code in pci-keystone-dw.c, so it caused
crashes on Keystone:
Unable to handle kernel NULL pointer dereference at virtual address 00000030
pgd = c0003000
[00000030] *pgd=80000800004003, *pmd=00000000
Internal error: Oops: 206 [#1] PREEMPT SMP ARM
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.4.2-00139-gb74f926 #2
Hardware name: Keystone
PC is at ks_dw_pcie_msi_irq_unmask+0x24/0x58
Change pci-keystone-dw.c to expect sysdata to be the struct pcie_port
pointer.
[bhelgaas: changelog]
Fixes: cbce790059 ("PCI: designware: Make driver arch-agnostic")
Signed-off-by: Murali Karicheri <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
CC: [email protected] # v4.4+
CC: Zhou Wang <[email protected]>
In the PCI hotplug path of the Intel IOMMU driver, replace
the usage of the BUS_NOTIFY_DEL_DEVICE notifier, which is
executed before the driver is unbound from the device, with
BUS_NOTIFY_REMOVED_DEVICE, which runs after that.
This fixes a kernel BUG being triggered in the VT-d code
when the device driver tries to unmap DMA buffers and the
VT-d driver already destroyed all mappings.
Reported-by: Stefani Seibold <[email protected]>
Cc: [email protected] # v4.3+
Signed-off-by: Joerg Roedel <[email protected]>
Recently, I fixed a bug in 3c59x:
commit 6e144419e4
Author: Neil Horman <[email protected]>
Date: Wed Jan 13 12:43:54 2016 -0500
3c59x: fix another page map/single unmap imbalance
Which correctly rebalanced dma mapping and unmapping types. Unfortunately it
introduced a new bug which causes oopses on older systems.
When mapping dma regions, the last entry for a packet in the 3c59x tx ring
encodes a LAST_FRAG bit, which is encoded as the high order bit of the buffers
length field. When it is unmapped the LAST_FRAG bit is cleared prior to being
passed to the unmap function. Unfortunately the commit above fails to do that
masking. It was missed in testing because the system on which I tested it had
an intel iommu, the driver for which ignores the size field, using only the DMA
address as the token to identify the mapping to be released. However, on older
systems that rely on swiotlb (or other dma drivers that key off that length
field), not masking off that LAST_FRAG high order bit results in parsing a huge
size to be release, leading to all sorts of odd corruptions and the like.
Fix is easy, just mask the length with 0xFFF. It should really be
&(LAST_FRAG-1), but 0xFFF is the style of the file, and I'd like to make this
fix minimal and correct before making it prettier.
Appies to the net tree cleanly. All testing on both iommu and swiommu based
systems produce good results
Signed-off-by: Neil Horman <[email protected]>
CC: Steffen Klassert <[email protected]>
CC: "David S. Miller" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
The HPCP bit is set by bioses for on-board sata ports either because
they think sata is hotplug capable in general or to allow Windows
to display a "device eject" icon on ports which are routed to an
external connector bracket.
However in Redhat Bugzilla #1310682, users report that with kernel 4.4,
where this bit test first appeared, a lot of partitions on sata drives
are now mounted automatically.
This patch should fix redhat and a lot of other distros which
unconditionally automount all devices which have the "removable"
bit set.
Signed-off-by: Manuel Lauss <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Fixes: 8a3e33cf92 ("ata: ahci: find eSATA ports and flag them as removable" changes userspace behavior)
Link: http://lkml.kernel.org/g/[email protected]
Cc: [email protected] #v4.4+
