commit a83d6ddaebe541570291205cb538e35ad4ff94f9 upstream.

In the SECURITY_FS_USE_MNTPOINT case we never want to allow relabeling
files/directories, so we should never set the SBLABEL_MNT flag. The
'special handling' in selinux_is_sblabel_mnt() is only intended for when
the behavior is set to SECURITY_FS_USE_GENFS.

While there, make the logic in selinux_is_sblabel_mnt() more explicit
and add a BUILD_BUG_ON() to make sure that introducing a new
SECURITY_FS_USE_* forces a review of the logic.

Fixes: d5f3a5f6 ("selinux: add security in-core xattr support for pstore and debugfs")
Signed-off-by: NOndrej Mosnacek <omosnace@redhat.com>
Reviewed-by: NStephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: NPaul Moore <paul@paul-moore.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 3a28cff3bd4bf43f02be0c4e7933aebf3dc8197e upstream.

commit 0dc1ba24 ("SELINUX: Make selinux cache VFS RCU walks safe")
results in no audit messages at all if in permissive mode because the
cache is updated during the rcu walk and thus no denial occurs on
the subsequent ref walk.  Fix this by not updating the cache when
performing a non-blocking permission check.  This only affects search
and symlink read checks during rcu walk.

Fixes: 0dc1ba24 ("SELINUX: Make selinux cache VFS RCU walks safe")
Reported-by: NBMK <bmktuwien@gmail.com>
Signed-off-by: NStephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: NPaul Moore <paul@paul-moore.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit a329bbe707cee2cf8c660890ef2ad0d00ec7e8a3 upstream.

On i.MX8MQ platform, clock driver uses platform driver
model and it is probed after GPIO driver, so when GPIO
driver fails to get clock, it should check the error type
to decide whether to return defer probe or just ignore
the clock operation.

Fixes: 2808801a ("gpio: mxc: add clock operation")
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 937c4e552fd1174784045684740edfcea536159d upstream.

We need to turn regulators on and off when switching brightness, and
that may block, therefore we have to set stmfts_brightness_set() as
LED's brightness_set_blocking() method.

Fixes: 78bcac7b ("Input: add support for the STMicroelectronics FingerTip touchscreen")
Acked-by: NAndi Shyti <andi@etezian.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit bf2a7ca39fd3ab47ef71c621a7ee69d1813b1f97 upstream.

SNVS IRQ is requested before necessary driver data initialized,
if there is a pending IRQ during driver probe phase, kernel
NULL pointer panic will occur in IRQ handler. To avoid such
scenario, just initialize necessary driver data before enabling
IRQ. This patch is inspired by NXP's internal kernel tree.

Fixes: d3dc6e23 ("input: keyboard: imx: add snvs power key driver")
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 535005ca8e5e71918d64074032f4b9d4fef8981e upstream.

The open-coded variant missed destroy of SELinux created QP, reuse already
existing ib_detroy_qp() call and use this opportunity to clean
ib_create_qp() from double prints and unclear exit paths.
Reported-by: NParav Pandit <parav@mellanox.com>
Fixes: d291f1a6 ("IB/core: Enforce PKey security on QPs")
Signed-off-by: NYuval Avnery <yuvalav@mellanox.com>
Reviewed-by: NParav Pandit <parav@mellanox.com>
Reviewed-by: NDaniel Jurgens <danielj@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 6e88e672b69f0e627acdae74a527b730ea224b6b upstream.

If the MAD agents isn't allowed to manage the subnet, or fails to register
for the LSM notifier, the security context is leaked. Free the context in
these cases.

Fixes: 47a2b338 ("IB/core: Enforce security on management datagrams")
Signed-off-by: NDaniel Jurgens <danielj@mellanox.com>
Reviewed-by: NParav Pandit <parav@mellanox.com>
Reported-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit d60667fc398ed34b3c7456b020481c55c760e503 upstream.

If the notifier runs after the security context is freed an access of
freed memory can occur.

Fixes: 47a2b338 ("IB/core: Enforce security on management datagrams")
Signed-off-by: NDaniel Jurgens <danielj@mellanox.com>
Reviewed-by: NParav Pandit <parav@mellanox.com>
Signed-off-by: NLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit e50af8332785355de3cb40d9f5e8c45dbfc86f53 upstream.

Only Coffeelake should use Cannonlake regmap other than Cannonlake
platform. This allows Coffeelake special handling only when there is no
matching PCI device and default reg map selected as per CPUID is for
Sunrisepoint PCH. This change is needed to enable support for newer SoCs
such as Icelake.

Cc: "David E. Box" <david.e.box@intel.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Fixes: 661405bd ("platform/x86: intel_pmc_core: Special case for Coffeelake")
Acked-by: N"David E. Box" <david.e.box@linux.intel.com>
Signed-off-by: NRajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit d6827015e671cd17871c9b7a0fabe06c044f7470 upstream.

For Cannonlake and Icelake, the IP name for Res_6 should be SPF i.e.
South Port F. No functional change is intended other than just renaming
the IP appropriately.

Cc: "David E. Box" <david.e.box@intel.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Fixes: 291101f6 ("platform/x86: intel_pmc_core: Add CannonLake PCH support")
Signed-off-by: NRajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 17d3069ccf06970e2db3f7cbf4335f207524279e upstream.

This patch fixes the sai driver structure overwriting which results in
a cpu dai name equal NULL.

Fixes: 3e086edf ("ASoC: stm32: add SAI driver")
Signed-off-by: NArnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 639e5eb3c7d67e407f2a71fccd95323751398f6f upstream.

Previously support was added to allow streams to be stopped and
started again without the DSP being power cycled and this was done
by clearing the buffer state in trigger start. Another supported
use-case is using the DSP for a trigger event then opening the
compressed stream later to receive the audio, unfortunately clearing
the buffer state in trigger start destroys the data received
from such a trigger. Correct this issue by moving the call to
wm_adsp_buffer_clear to be in trigger stop instead.

Fixes: 61fc060c ("ASoC: wm_adsp: Support streams which can start/stop with DSP active")
Signed-off-by: NCharles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit aee48a9ffa5a128bf4e433c57c39e015ea5b0208 upstream.

Commit 37c7401e ("ASoC: Intel: bytcr_rt5651: Fix DMIC map
headsetmic mapping"), changed the headsetmic mapping from IN3P to IN2P,
this was based on the observation that all bytcr_rt5651 devices I have
access to (7 devices) where all using IN3P for the headsetmic. This was
an attempt to unifify / simplify the mapping, but it was wrong.

None of those devices was actually using a digital internal mic. Now I've
access to a Point of View TAB-P1006W-232 (v1.0) tabler, which does use a
DMIC and it does have its headsetmic connected to IN2P, showing that the
original mapping was correct, so this commit reverts the change changing
the mapping back to IN2P.

Fixes: 37c7401e ("ASoC: Intel: bytcr_rt5651: Fix DMIC map ... mapping")
Acked-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 40ca8757291ca7a8775498112d320205b2a2e571 upstream.

Make sure that the next time a response is sent to the initiator that the
credit it had allocated for the aborted request gets freed.

Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Fixes: 131e6abc ("target: Add TFO->abort_task for aborted task resources release") # v3.15
Signed-off-by: NBart Van Assche <bvanassche@acm.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 78accaea117c1ae878774974fab91ac4a0b0e2b0 upstream.

The lsb calculation is not masking the correct bits from the user input.
Subtract 1 from (1 << offset) to correctly set up the mask to be applied
to user input.

The lsb register stores its value starting at the bit 7 position.
adt7316_store_DAC() currently assumes the value is at the other end of the
register. Shift the lsb value before storing it in a new variable lsb_reg,
and write this variable to the lsb register.

Fixes: 35f6b6b8 ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: NJeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 45130fb030aec26ac28b4bb23344901df3ec3b7f upstream.

The calculation of the current dac value is using the wrong bits of the
dac lsb register. Create two macros to shift the lsb register value into
lsb position, depending on whether the dac is 10 or 12 bit. Initialize
data to 0 so, with an 8 bit dac, the msb register value can be bitwise
ORed with data.

Fixes: 35f6b6b8 ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: NJeremy Fertic <jeremyfertic@gmail.com>
Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 10bfe7cc1739c22f0aa296b39e53f61e9e3f4d99 upstream.

With adt7516/7/9, internal vref is available for dacs a and b, dacs c and
d, or all dacs. The driver doesn't currently support internal vref for all
dacs. Change the else if to an if so both bits are checked rather than
just one or the other.
Signed-off-by: NJeremy Fertic <jeremyfertic@gmail.com>
Fixes: 35f6b6b8 ("staging: iio: new ADT7316/7/8 and ADT7516/7/9 driver")
Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 0c8ff62504e3a667387e87889a259632c3199a86 upstream.

The usb30_master_clk supports a 60Mhz frequency, but that is missing from
the table of supported frequencies.  Add it.

Fixes: b5f5f525 (clk: qcom: Add MSM8998 Global Clock Control (GCC) driver)
Signed-off-by: NJeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: NStephen Boyd <sboyd@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 77f328dbc6cf42f22c691a164958a5452142a542 upstream.

Restore bdev->tx_state with clearing bit BTMTKUART_TX_WAIT_VND_EVT
when there is an error on waiting for the corresponding event.

Fixes: 7237c4c9 ("Bluetooth: mediatek: Add protocol support for MediaTek serial devices")
Signed-off-by: NSean Wang <sean.wang@mediatek.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 771acc7e4a6e5dba779cb1a7fd851a164bc81033 upstream.

Badly-designed systems might have (for example) active-high wake pins
that default to high (e.g., because of external pull ups) until they
have an active firmware which starts driving it low.  This can cause an
interrupt storm in the time between request_irq() and disable_irq().

We don't support shared interrupts here, so let's just pre-configure the
interrupt to avoid auto-enabling it.

Fixes: fd913ef7 ("Bluetooth: btusb: Add out-of-band wakeup support")
Fixes: 5364a0b4f4be ("arm64: dts: rockchip: move QCA6174A wakeup pin into its USB node")
Signed-off-by: NBrian Norris <briannorris@chromium.org>
Reviewed-by: NMatthias Kaehlcke <mka@chromium.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 0e3b74e26280f2cf8753717a950b97d424da6046 upstream.

Add a new amd_hw_cache_event_ids_f17h assignment structure set
for AMD families 17h and above, since a lot has changed.  Specifically:

L1 Data Cache

The data cache access counter remains the same on Family 17h.

For DC misses, PMCx041's definition changes with Family 17h,
so instead we use the L2 cache accesses from L1 data cache
misses counter (PMCx060,umask=0xc8).

For DC hardware prefetch events, Family 17h breaks compatibility
for PMCx067 "Data Prefetcher", so instead, we use PMCx05a "Hardware
Prefetch DC Fills."

L1 Instruction Cache

PMCs 0x80 and 0x81 (32-byte IC fetches and misses) are backward
compatible on Family 17h.

For prefetches, we remove the erroneous PMCx04B assignment which
counts how many software data cache prefetch load instructions were
dispatched.

LL - Last Level Cache

Removing PMCs 7D, 7E, and 7F assignments, as they do not exist
on Family 17h, where the last level cache is L3.  L3 counters
can be accessed using the existing AMD Uncore driver.

Data TLB

On Intel machines, data TLB accesses ("dTLB-loads") are assigned
to counters that count load/store instructions retired.  This
is inconsistent with instruction TLB accesses, where Intel
implementations report iTLB misses that hit in the STLB.

Ideally, dTLB-loads would count higher level dTLB misses that hit
in lower level TLBs, and dTLB-load-misses would report those
that also missed in those lower-level TLBs, therefore causing
a page table walk.  That would be consistent with instruction
TLB operation, remove the redundancy between dTLB-loads and
L1-dcache-loads, and prevent perf from producing artificially
low percentage ratios, i.e. the "0.01%" below:

        42,550,869      L1-dcache-loads
        41,591,860      dTLB-loads
             4,802      dTLB-load-misses          #    0.01% of all dTLB cache hits
         7,283,682      L1-dcache-stores
         7,912,392      dTLB-stores
               310      dTLB-store-misses

On AMD Families prior to 17h, the "Data Cache Accesses" counter is
used, which is slightly better than load/store instructions retired,
but still counts in terms of individual load/store operations
instead of TLB operations.

So, for AMD Families 17h and higher, this patch assigns "dTLB-loads"
to a counter for L1 dTLB misses that hit in the L2 dTLB, and
"dTLB-load-misses" to a counter for L1 DTLB misses that caused
L2 DTLB misses and therefore also caused page table walks.  This
results in a much more accurate view of data TLB performance:

        60,961,781      L1-dcache-loads
             4,601      dTLB-loads
               963      dTLB-load-misses          #   20.93% of all dTLB cache hits

Note that for all AMD families, data loads and stores are combined
in a single accesses counter, so no 'L1-dcache-stores' are reported
separately, and stores are counted with loads in 'L1-dcache-loads'.

Also note that the "% of all dTLB cache hits" string is misleading
because (a) "dTLB cache": although TLBs can be considered caches for
page tables, in this context, it can be misinterpreted as data cache
hits because the figures are similar (at least on Intel), and (b) not
all those loads (technically accesses) technically "hit" at that
hardware level.  "% of all dTLB accesses" would be more clear/accurate.

Instruction TLB

On Intel machines, 'iTLB-loads' measure iTLB misses that hit in the
STLB, and 'iTLB-load-misses' measure iTLB misses that also missed in
the STLB and completed a page table walk.

For AMD Family 17h and above, for 'iTLB-loads' we replace the
erroneous instruction cache fetches counter with PMCx084
"L1 ITLB Miss, L2 ITLB Hit".

For 'iTLB-load-misses' we still use PMCx085 "L1 ITLB Miss,
L2 ITLB Miss", but set a 0xff umask because without it the event
does not get counted.

Branch Predictor (BPU)

PMCs 0xc2 and 0xc3 continue to be valid across all AMD Families.

Node Level Events

Family 17h does not have a PMCx0e9 counter, and corresponding counters
have not been made available publicly, so for now, we mark them as
unsupported for Families 17h and above.

Reference:

  "Open-Source Register Reference For AMD Family 17h Processors Models 00h-2Fh"
  Released 7/17/2018, Publication #56255, Revision 3.03:
  https://www.amd.com/system/files/TechDocs/56255_OSRR.pdf

[ mingo: tidied up the line breaks. ]
Signed-off-by: NKim Phillips <kim.phillips@amd.com>
Cc: <stable@vger.kernel.org> # v4.9+
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Lendacky <Thomas.Lendacky@amd.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Cc: linux-perf-users@vger.kernel.org
Fixes: e40ed154 ("perf/x86: Add perf support for AMD family-17h processors")
Signed-off-by: NIngo Molnar <mingo@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 2e3c18d0ada16f145087b2687afcad1748c0827c ]

syzbot is hitting flush_work() warning caused by commit 4d43d395fed12463
("workqueue: Try to catch flush_work() without INIT_WORK().") [1].
Although that commit did not expect INIT_WORK(NULL) case, calling
flush_work() without setting a valid callback should be avoided anyway.
Fix this problem by setting a no-op callback instead of NULL.

[1] https://syzkaller.appspot.com/bug?id=e390366bc48bc82a7c668326e0663be3b91cbd29Signed-off-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-and-tested-by: Nsyzbot <syzbot+ba2a929dcf8e704c180e@syzkaller.appspotmail.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
[sl: rename blk_timeout_work]
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 2125801ccce19249708ca3245d48998e70569ab8 ]

clang warns about statically defined DMA masks from the DMA_BIT_MASK
macro with length 64:

 arch/arm/mach-iop13xx/setup.c:303:35: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
 static u64 iop13xx_adma_dmamask = DMA_BIT_MASK(64);
                                  ^~~~~~~~~~~~~~~~
 include/linux/dma-mapping.h:141:54: note: expanded from macro 'DMA_BIT_MASK'
 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
                                                      ^ ~~~

The ones in iop shouldn't really be 64 bit masks, so changing them
to what the driver can support avoids the warning.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit cd92d74d67c811dc22544430b9ac3029f5bd64c5 ]

clang warns about statically defined DMA masks from the DMA_BIT_MASK
macro with length 64:

arch/arm/plat-orion/common.c:625:29: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
                .coherent_dma_mask      = DMA_BIT_MASK(64),
                                          ^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:141:54: note: expanded from macro 'DMA_BIT_MASK'
 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))

The ones in orion shouldn't really be 64 bit masks, so changing them
to what the driver can support avoids the warning.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

fs: stream_open - opener for stream-like files so that read and write can run simultaneously without deadlock

[ Upstream commit 10dce8af34226d90fa56746a934f8da5dcdba3df ]

Commit 9c225f26 ("vfs: atomic f_pos accesses as per POSIX") added
locking for file.f_pos access and in particular made concurrent read and
write not possible - now both those functions take f_pos lock for the
whole run, and so if e.g. a read is blocked waiting for data, write will
deadlock waiting for that read to complete.

This caused regression for stream-like files where previously read and
write could run simultaneously, but after that patch could not do so
anymore. See e.g. commit 581d21a2 ("xenbus: fix deadlock on writes
to /proc/xen/xenbus") which fixes such regression for particular case of
/proc/xen/xenbus.

The patch that added f_pos lock in 2014 did so to guarantee POSIX thread
safety for read/write/lseek and added the locking to file descriptors of
all regular files. In 2014 that thread-safety problem was not new as it
was already discussed earlier in 2006.

However even though 2006'th version of Linus's patch was adding f_pos
locking "only for files that are marked seekable with FMODE_LSEEK (thus
avoiding the stream-like objects like pipes and sockets)", the 2014
version - the one that actually made it into the tree as 9c225f26 -
is doing so irregardless of whether a file is seekable or not.

See

    https://lore.kernel.org/lkml/53022DB1.4070805@gmail.com/
    https://lwn.net/Articles/180387
    https://lwn.net/Articles/180396

for historic context.

The reason that it did so is, probably, that there are many files that
are marked non-seekable, but e.g. their read implementation actually
depends on knowing current position to correctly handle the read. Some
examples:

	kernel/power/user.c		snapshot_read
	fs/debugfs/file.c		u32_array_read
	fs/fuse/control.c		fuse_conn_waiting_read + ...
	drivers/hwmon/asus_atk0110.c	atk_debugfs_ggrp_read
	arch/s390/hypfs/inode.c		hypfs_read_iter
	...

Despite that, many nonseekable_open users implement read and write with
pure stream semantics - they don't depend on passed ppos at all. And for
those cases where read could wait for something inside, it creates a
situation similar to xenbus - the write could be never made to go until
read is done, and read is waiting for some, potentially external, event,
for potentially unbounded time -> deadlock.

Besides xenbus, there are 14 such places in the kernel that I've found
with semantic patch (see below):

	drivers/xen/evtchn.c:667:8-24: ERROR: evtchn_fops: .read() can deadlock .write()
	drivers/isdn/capi/capi.c:963:8-24: ERROR: capi_fops: .read() can deadlock .write()
	drivers/input/evdev.c:527:1-17: ERROR: evdev_fops: .read() can deadlock .write()
	drivers/char/pcmcia/cm4000_cs.c:1685:7-23: ERROR: cm4000_fops: .read() can deadlock .write()
	net/rfkill/core.c:1146:8-24: ERROR: rfkill_fops: .read() can deadlock .write()
	drivers/s390/char/fs3270.c:488:1-17: ERROR: fs3270_fops: .read() can deadlock .write()
	drivers/usb/misc/ldusb.c:310:1-17: ERROR: ld_usb_fops: .read() can deadlock .write()
	drivers/hid/uhid.c:635:1-17: ERROR: uhid_fops: .read() can deadlock .write()
	net/batman-adv/icmp_socket.c:80:1-17: ERROR: batadv_fops: .read() can deadlock .write()
	drivers/media/rc/lirc_dev.c:198:1-17: ERROR: lirc_fops: .read() can deadlock .write()
	drivers/leds/uleds.c:77:1-17: ERROR: uleds_fops: .read() can deadlock .write()
	drivers/input/misc/uinput.c:400:1-17: ERROR: uinput_fops: .read() can deadlock .write()
	drivers/infiniband/core/user_mad.c:985:7-23: ERROR: umad_fops: .read() can deadlock .write()
	drivers/gnss/core.c:45:1-17: ERROR: gnss_fops: .read() can deadlock .write()

In addition to the cases above another regression caused by f_pos
locking is that now FUSE filesystems that implement open with
FOPEN_NONSEEKABLE flag, can no longer implement bidirectional
stream-like files - for the same reason as above e.g. read can deadlock
write locking on file.f_pos in the kernel.

FUSE's FOPEN_NONSEEKABLE was added in 2008 in a7c1b990 ("fuse:
implement nonseekable open") to support OSSPD. OSSPD implements /dev/dsp
in userspace with FOPEN_NONSEEKABLE flag, with corresponding read and
write routines not depending on current position at all, and with both
read and write being potentially blocking operations:

See

    https://github.com/libfuse/osspd
    https://lwn.net/Articles/308445

    https://github.com/libfuse/osspd/blob/14a9cff0/osspd.c#L1406
    https://github.com/libfuse/osspd/blob/14a9cff0/osspd.c#L1438-L1477
    https://github.com/libfuse/osspd/blob/14a9cff0/osspd.c#L1479-L1510

Corresponding libfuse example/test also describes FOPEN_NONSEEKABLE as
"somewhat pipe-like files ..." with read handler not using offset.
However that test implements only read without write and cannot exercise
the deadlock scenario:

    https://github.com/libfuse/libfuse/blob/fuse-3.4.2-3-ga1bff7d/example/poll.c#L124-L131
    https://github.com/libfuse/libfuse/blob/fuse-3.4.2-3-ga1bff7d/example/poll.c#L146-L163
    https://github.com/libfuse/libfuse/blob/fuse-3.4.2-3-ga1bff7d/example/poll.c#L209-L216

I've actually hit the read vs write deadlock for real while implementing
my FUSE filesystem where there is /head/watch file, for which open
creates separate bidirectional socket-like stream in between filesystem
and its user with both read and write being later performed
simultaneously. And there it is semantically not easy to split the
stream into two separate read-only and write-only channels:

    https://lab.nexedi.com/kirr/wendelin.core/blob/f13aa600/wcfs/wcfs.go#L88-169

Let's fix this regression. The plan is:

1. We can't change nonseekable_open to include &~FMODE_ATOMIC_POS -
   doing so would break many in-kernel nonseekable_open users which
   actually use ppos in read/write handlers.

2. Add stream_open() to kernel to open stream-like non-seekable file
   descriptors. Read and write on such file descriptors would never use
   nor change ppos. And with that property on stream-like files read and
   write will be running without taking f_pos lock - i.e. read and write
   could be running simultaneously.

3. With semantic patch search and convert to stream_open all in-kernel
   nonseekable_open users for which read and write actually do not
   depend on ppos and where there is no other methods in file_operations
   which assume @offset access.

4. Add FOPEN_STREAM to fs/fuse/ and open in-kernel file-descriptors via
   steam_open if that bit is present in filesystem open reply.

   It was tempting to change fs/fuse/ open handler to use stream_open
   instead of nonseekable_open on just FOPEN_NONSEEKABLE flags, but
   grepping through Debian codesearch shows users of FOPEN_NONSEEKABLE,
   and in particular GVFS which actually uses offset in its read and
   write handlers

	https://codesearch.debian.net/search?q=-%3Enonseekable+%3D
	https://gitlab.gnome.org/GNOME/gvfs/blob/1.40.0-6-gcbc54396/client/gvfsfusedaemon.c#L1080
	https://gitlab.gnome.org/GNOME/gvfs/blob/1.40.0-6-gcbc54396/client/gvfsfusedaemon.c#L1247-1346
	https://gitlab.gnome.org/GNOME/gvfs/blob/1.40.0-6-gcbc54396/client/gvfsfusedaemon.c#L1399-1481

   so if we would do such a change it will break a real user.

5. Add stream_open and FOPEN_STREAM handling to stable kernels starting
   from v3.14+ (the kernel where 9c225f26 first appeared).

   This will allow to patch OSSPD and other FUSE filesystems that
   provide stream-like files to return FOPEN_STREAM | FOPEN_NONSEEKABLE
   in their open handler and this way avoid the deadlock on all kernel
   versions. This should work because fs/fuse/ ignores unknown open
   flags returned from a filesystem and so passing FOPEN_STREAM to a
   kernel that is not aware of this flag cannot hurt. In turn the kernel
   that is not aware of FOPEN_STREAM will be < v3.14 where just
   FOPEN_NONSEEKABLE is sufficient to implement streams without read vs
   write deadlock.

This patch adds stream_open, converts /proc/xen/xenbus to it and adds
semantic patch to automatically locate in-kernel places that are either
required to be converted due to read vs write deadlock, or that are just
safe to be converted because read and write do not use ppos and there
are no other funky methods in file_operations.

Regarding semantic patch I've verified each generated change manually -
that it is correct to convert - and each other nonseekable_open instance
left - that it is either not correct to convert there, or that it is not
converted due to current stream_open.cocci limitations.

The script also does not convert files that should be valid to convert,
but that currently have .llseek = noop_llseek or generic_file_llseek for
unknown reason despite file being opened with nonseekable_open (e.g.
drivers/input/mousedev.c)

Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Yongzhi Pan <panyongzhi@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Tejun Heo <tj@kernel.org>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Nikolaus Rath <Nikolaus@rath.org>
Cc: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: NKirill Smelkov <kirr@nexedi.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 47b16820c490149c2923e8474048f2c6e7557cab ]

If xace hardware reports a bad version number, the error handling code
in ace_setup() calls put_disk(), followed by queue cleanup. However, since
the disk data structure has the queue pointer set, put_disk() also
cleans and releases the queue. This results in blk_cleanup_queue()
accessing an already released data structure, which in turn may result
in a crash such as the following.

[   10.681671] BUG: Kernel NULL pointer dereference at 0x00000040
[   10.681826] Faulting instruction address: 0xc0431480
[   10.682072] Oops: Kernel access of bad area, sig: 11 [#1]
[   10.682251] BE PAGE_SIZE=4K PREEMPT Xilinx Virtex440
[   10.682387] Modules linked in:
[   10.682528] CPU: 0 PID: 1 Comm: swapper Tainted: G        W         5.0.0-rc6-next-20190218+ #2
[   10.682733] NIP:  c0431480 LR: c043147c CTR: c0422ad8
[   10.682863] REGS: cf82fbe0 TRAP: 0300   Tainted: G        W          (5.0.0-rc6-next-20190218+)
[   10.683065] MSR:  00029000 <CE,EE,ME>  CR: 22000222  XER: 00000000
[   10.683236] DEAR: 00000040 ESR: 00000000
[   10.683236] GPR00: c043147c cf82fc90 cf82ccc0 00000000 00000000 00000000 00000002 00000000
[   10.683236] GPR08: 00000000 00000000 c04310bc 00000000 22000222 00000000 c0002c54 00000000
[   10.683236] GPR16: 00000000 00000001 c09aa39c c09021b0 c09021dc 00000007 c0a68c08 00000000
[   10.683236] GPR24: 00000001 ced6d400 ced6dcf0 c0815d9c 00000000 00000000 00000000 cedf0800
[   10.684331] NIP [c0431480] blk_mq_run_hw_queue+0x28/0x114
[   10.684473] LR [c043147c] blk_mq_run_hw_queue+0x24/0x114
[   10.684602] Call Trace:
[   10.684671] [cf82fc90] [c043147c] blk_mq_run_hw_queue+0x24/0x114 (unreliable)
[   10.684854] [cf82fcc0] [c04315bc] blk_mq_run_hw_queues+0x50/0x7c
[   10.685002] [cf82fce0] [c0422b24] blk_set_queue_dying+0x30/0x68
[   10.685154] [cf82fcf0] [c0423ec0] blk_cleanup_queue+0x34/0x14c
[   10.685306] [cf82fd10] [c054d73c] ace_probe+0x3dc/0x508
[   10.685445] [cf82fd50] [c052d740] platform_drv_probe+0x4c/0xb8
[   10.685592] [cf82fd70] [c052abb0] really_probe+0x20c/0x32c
[   10.685728] [cf82fda0] [c052ae58] driver_probe_device+0x68/0x464
[   10.685877] [cf82fdc0] [c052b500] device_driver_attach+0xb4/0xe4
[   10.686024] [cf82fde0] [c052b5dc] __driver_attach+0xac/0xfc
[   10.686161] [cf82fe00] [c0528428] bus_for_each_dev+0x80/0xc0
[   10.686314] [cf82fe30] [c0529b3c] bus_add_driver+0x144/0x234
[   10.686457] [cf82fe50] [c052c46c] driver_register+0x88/0x15c
[   10.686610] [cf82fe60] [c09de288] ace_init+0x4c/0xac
[   10.686742] [cf82fe80] [c0002730] do_one_initcall+0xac/0x330
[   10.686888] [cf82fee0] [c09aafd0] kernel_init_freeable+0x34c/0x478
[   10.687043] [cf82ff30] [c0002c6c] kernel_init+0x18/0x114
[   10.687188] [cf82ff40] [c000f2f0] ret_from_kernel_thread+0x14/0x1c
[   10.687349] Instruction dump:
[   10.687435] 3863ffd4 4bfffd70 9421ffd0 7c0802a6 93c10028 7c9e2378 93e1002c 38810008
[   10.687637] 7c7f1b78 90010034 4bfffc25 813f008c <81290040> 75290100 4182002c 80810008
[   10.688056] ---[ end trace 13c9ff51d41b9d40 ]---

Fix the problem by setting the disk queue pointer to NULL before calling
put_disk(). A more comprehensive fix might be to rearrange the code
to check the hardware version before initializing data structures,
but I don't know if this would have undesirable side effects, and
it would increase the complexity of backporting the fix to older kernels.

Fixes: 74489a91 ("Add support for Xilinx SystemACE CompactFlash interface")
Acked-by: NMichal Simek <michal.simek@xilinx.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit acaf892ecbf5be7710ae05a61fd43c668f68ad95 ]

Many of the sh CPU-types have their own plat_irq_setup() and
arch_init_clk_ops() functions, so these same (empty) functions in
arch/sh/boards/of-generic.c are not needed and cause build errors.

If there is some case where these empty functions are needed, they can
be retained by marking them as "__weak" while at the same time making
builds that do not need them succeed.

Fixes these build errors:

arch/sh/boards/of-generic.o: In function `plat_irq_setup':
(.init.text+0x134): multiple definition of `plat_irq_setup'
arch/sh/kernel/cpu/sh2/setup-sh7619.o:(.init.text+0x30): first defined here
arch/sh/boards/of-generic.o: In function `arch_init_clk_ops':
(.init.text+0x118): multiple definition of `arch_init_clk_ops'
arch/sh/kernel/cpu/sh2/clock-sh7619.o:(.init.text+0x0): first defined here

Link: http://lkml.kernel.org/r/9ee4e0c5-f100-86a2-bd4d-1d3287ceab31@infradead.orgSigned-off-by: NRandy Dunlap <rdunlap@infradead.org>
Reported-by: Nkbuild test robot <lkp@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 58b6e5e8f1addd44583d61b0a03c0f5519527e35 ]

When mknod is used to create a block special file in hugetlbfs, it will
allocate an inode and kmalloc a 'struct resv_map' via resv_map_alloc().
inode->i_mapping->private_data will point the newly allocated resv_map.
However, when the device special file is opened bd_acquire() will set
inode->i_mapping to bd_inode->i_mapping.  Thus the pointer to the
allocated resv_map is lost and the structure is leaked.

Programs to reproduce:
        mount -t hugetlbfs nodev hugetlbfs
        mknod hugetlbfs/dev b 0 0
        exec 30<> hugetlbfs/dev
        umount hugetlbfs/

resv_map structures are only needed for inodes which can have associated
page allocations.  To fix the leak, only allocate resv_map for those
inodes which could possibly be associated with page allocations.

Link: http://lkml.kernel.org/r/20190401213101.16476-1-mike.kravetz@oracle.comSigned-off-by: NMike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: NAndrew Morton <akpm@linux-foundation.org>
Reported-by: NYufen Yu <yuyufen@huawei.com>
Suggested-by: NYufen Yu <yuyufen@huawei.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 298a32b132087550d3fa80641ca58323c5dfd4d9 ]

Commit 2d4f5671 ("KVM: PPC: Introduce kvm_tmp framework") adds
kvm_tmp[] into the .bss section and then free the rest of unused spaces
back to the page allocator.

kernel_init
  kvm_guest_init
    kvm_free_tmp
      free_reserved_area
        free_unref_page
          free_unref_page_prepare

With DEBUG_PAGEALLOC=y, it will unmap those pages from kernel.  As the
result, kmemleak scan will trigger a panic when it scans the .bss
section with unmapped pages.

This patch creates dedicated kmemleak objects for the .data, .bss and
potentially .data..ro_after_init sections to allow partial freeing via
the kmemleak_free_part() in the powerpc kvm_free_tmp() function.

Link: http://lkml.kernel.org/r/20190321171917.62049-1-catalin.marinas@arm.comSigned-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Reported-by: NQian Cai <cai@lca.pw>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Tested-by: NQian Cai <cai@lca.pw>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Avi Kivity <avi@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit b86bc2858b389255cd44555ce4b1e427b2b770c0 ]

This ensures that the address and length provided to DBG_DECRYPT and
DBG_ENCRYPT do not cause an overflow.

At the same time, pass the actual number of pages pinned in memory to
sev_unpin_memory() as a cleanup.
Reported-by: NCfir Cohen <cfir@google.com>
Signed-off-by: NDavid Rientjes <rientjes@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit cc5a726c79158bd307150e8d4176ec79b52001ea ]

BITS_TO_LONGS() uses DIV_ROUND_UP() because of
this ppmax value can be greater than available
per cpu page pods.

This patch removes BITS_TO_LONGS() to fix this
issue.
Signed-off-by: NVarun Prakash <varun@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 8601a99d7c0256b7a7fdd1ab14cf6c1f1dfcadc6 ]

When enable SMMU, remove HNS driver will cause a WARNING:

[  141.924177] WARNING: CPU: 36 PID: 2708 at drivers/iommu/dma-iommu.c:443 __iommu_dma_unmap+0xc0/0xc8
[  141.954673] Modules linked in: hns_enet_drv(-)
[  141.963615] CPU: 36 PID: 2708 Comm: rmmod Tainted: G        W         5.0.0-rc1-28723-gb729c57de95c-dirty #32
[  141.983593] Hardware name: Huawei D05/D05, BIOS Hisilicon D05 UEFI Nemo 1.8 RC0 08/31/2017
[  142.000244] pstate: 60000005 (nZCv daif -PAN -UAO)
[  142.009886] pc : __iommu_dma_unmap+0xc0/0xc8
[  142.018476] lr : __iommu_dma_unmap+0xc0/0xc8
[  142.027066] sp : ffff000013533b90
[  142.033728] x29: ffff000013533b90 x28: ffff8013e6983600
[  142.044420] x27: 0000000000000000 x26: 0000000000000000
[  142.055113] x25: 0000000056000000 x24: 0000000000000015
[  142.065806] x23: 0000000000000028 x22: ffff8013e66eee68
[  142.076499] x21: ffff8013db919800 x20: 0000ffffefbff000
[  142.087192] x19: 0000000000001000 x18: 0000000000000007
[  142.097885] x17: 000000000000000e x16: 0000000000000001
[  142.108578] x15: 0000000000000019 x14: 363139343a70616d
[  142.119270] x13: 6e75656761705f67 x12: 0000000000000000
[  142.129963] x11: 00000000ffffffff x10: 0000000000000006
[  142.140656] x9 : 1346c1aa88093500 x8 : ffff0000114de4e0
[  142.151349] x7 : 6662666578303d72 x6 : ffff0000105ffec8
[  142.162042] x5 : 0000000000000000 x4 : 0000000000000000
[  142.172734] x3 : 00000000ffffffff x2 : ffff0000114de500
[  142.183427] x1 : 0000000000000000 x0 : 0000000000000035
[  142.194120] Call trace:
[  142.199030]  __iommu_dma_unmap+0xc0/0xc8
[  142.206920]  iommu_dma_unmap_page+0x20/0x28
[  142.215335]  __iommu_unmap_page+0x40/0x60
[  142.223399]  hnae_unmap_buffer+0x110/0x134
[  142.231639]  hnae_free_desc+0x6c/0x10c
[  142.239177]  hnae_fini_ring+0x14/0x34
[  142.246540]  hnae_fini_queue+0x2c/0x40
[  142.254080]  hnae_put_handle+0x38/0xcc
[  142.261619]  hns_nic_dev_remove+0x54/0xfc [hns_enet_drv]
[  142.272312]  platform_drv_remove+0x24/0x64
[  142.280552]  device_release_driver_internal+0x17c/0x20c
[  142.291070]  driver_detach+0x4c/0x90
[  142.298259]  bus_remove_driver+0x5c/0xd8
[  142.306148]  driver_unregister+0x2c/0x54
[  142.314037]  platform_driver_unregister+0x10/0x18
[  142.323505]  hns_nic_dev_driver_exit+0x14/0xf0c [hns_enet_drv]
[  142.335248]  __arm64_sys_delete_module+0x214/0x25c
[  142.344891]  el0_svc_common+0xb0/0x10c
[  142.352430]  el0_svc_handler+0x24/0x80
[  142.359968]  el0_svc+0x8/0x7c0
[  142.366104] ---[ end trace 60ad1cd58e63c407 ]---

The tx ring buffer map when xmit and unmap when xmit done. So in
hnae_init_ring() did not map tx ring buffer, but in hnae_fini_ring()
have a unmap operation for tx ring buffer, which is already unmapped
when xmit done, than cause this WARNING.

The hnae_alloc_buffers() is called in hnae_init_ring(),
so the hnae_free_buffers() should be in hnae_fini_ring(), not in
hnae_free_desc().

In hnae_fini_ring(), adds a check is_rx_ring() as in hnae_init_ring().
When the ring buffer is tx ring, adds a piece of code to ensure that
the tx ring is unmap.
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit f058e46855dcbc28edb2ed4736f38a71fd19cadb ]

ICMP6 neighbor solicitation messages will be discard by the Hip06
chips, because of not setting forwarding pool. Enable promisc mode
has the same problem.

This patch fix the wrong forwarding table configs for the multicast
vague matching when enable promisc mode, and add forwarding pool
for the forwarding table.
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit c0b0984426814f3a9251873b689e67d34d8ccd84 ]

When reboot the system again and again, may cause a memory
overwrite.

[   15.638922] systemd[1]: Reached target Swap.
[   15.667561] tun: Universal TUN/TAP device driver, 1.6
[   15.676756] Bridge firewalling registered
[   17.344135] Unable to handle kernel paging request at virtual address 0000000200000040
[   17.352179] Mem abort info:
[   17.355007]   ESR = 0x96000004
[   17.358105]   Exception class = DABT (current EL), IL = 32 bits
[   17.364112]   SET = 0, FnV = 0
[   17.367209]   EA = 0, S1PTW = 0
[   17.370393] Data abort info:
[   17.373315]   ISV = 0, ISS = 0x00000004
[   17.377206]   CM = 0, WnR = 0
[   17.380214] user pgtable: 4k pages, 48-bit VAs, pgdp = (____ptrval____)
[   17.386926] [0000000200000040] pgd=0000000000000000
[   17.391878] Internal error: Oops: 96000004 [#1] SMP
[   17.396824] CPU: 23 PID: 95 Comm: kworker/u130:0 Tainted: G            E     4.19.25-1.2.78.aarch64 #1
[   17.414175] Hardware name: Huawei TaiShan 2280 /BC11SPCD, BIOS 1.54 08/16/2018
[   17.425615] Workqueue: events_unbound async_run_entry_fn
[   17.435151] pstate: 00000005 (nzcv daif -PAN -UAO)
[   17.444139] pc : __mutex_lock.isra.1+0x74/0x540
[   17.453002] lr : __mutex_lock.isra.1+0x3c/0x540
[   17.461701] sp : ffff000100d9bb60
[   17.469146] x29: ffff000100d9bb60 x28: 0000000000000000
[   17.478547] x27: 0000000000000000 x26: ffff802fb8945000
[   17.488063] x25: 0000000000000000 x24: ffff802fa32081a8
[   17.497381] x23: 0000000000000002 x22: ffff801fa2b15220
[   17.506701] x21: ffff000009809000 x20: ffff802fa23a0888
[   17.515980] x19: ffff801fa2b15220 x18: 0000000000000000
[   17.525272] x17: 0000000200000000 x16: 0000000200000000
[   17.534511] x15: 0000000000000000 x14: 0000000000000000
[   17.543652] x13: ffff000008d95db8 x12: 000000000000000d
[   17.552780] x11: ffff000008d95d90 x10: 0000000000000b00
[   17.561819] x9 : ffff000100d9bb90 x8 : ffff802fb89d6560
[   17.570829] x7 : 0000000000000004 x6 : 00000004a1801d05
[   17.579839] x5 : 0000000000000000 x4 : 0000000000000000
[   17.588852] x3 : ffff802fb89d5a00 x2 : 0000000000000000
[   17.597734] x1 : 0000000200000000 x0 : 0000000200000000
[   17.606631] Process kworker/u130:0 (pid: 95, stack limit = 0x(____ptrval____))
[   17.617438] Call trace:
[   17.623349]  __mutex_lock.isra.1+0x74/0x540
[   17.630927]  __mutex_lock_slowpath+0x24/0x30
[   17.638602]  mutex_lock+0x50/0x60
[   17.645295]  drain_workqueue+0x34/0x198
[   17.652623]  __sas_drain_work+0x7c/0x168
[   17.659903]  sas_drain_work+0x60/0x68
[   17.666947]  hisi_sas_scan_finished+0x30/0x40 [hisi_sas_main]
[   17.676129]  do_scsi_scan_host+0x70/0xb0
[   17.683534]  do_scan_async+0x20/0x228
[   17.690586]  async_run_entry_fn+0x4c/0x1d0
[   17.697997]  process_one_work+0x1b4/0x3f8
[   17.705296]  worker_thread+0x54/0x470

Every time the call trace is not the same, but the overwrite address
is always the same:
Unable to handle kernel paging request at virtual address 0000000200000040

The root cause is, when write the reg XGMAC_MAC_TX_LF_RF_CONTROL_REG,
didn't use the io_base offset.
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit acb1ce15a61154aa501891d67ebf79bc9ea26818 ]

When the HNS driver loaded, always have an error print:
"netif_napi_add() called with weight 256"

This is because the kernel checks the NAPI polling weights
requested by drivers and it prints an error message if a driver
requests a weight bigger than 64.

So use NAPI_POLL_WEIGHT to fix it.
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 3a39a12ad364a9acd1038ba8da67cd8430f30de4 ]

This patch is trying to fix the issue due to:
[27237.844750] BUG: KASAN: use-after-free in hns_nic_net_xmit_hw+0x708/0xa18[hns_enet_drv]

After hnae_queue_xmit() in hns_nic_net_xmit_hw(), can be
interrupted by interruptions, and than call hns_nic_tx_poll_one()
to handle the new packets, and free the skb. So, when turn back to
hns_nic_net_xmit_hw(), calling skb->len will cause use-after-free.

This patch update tx ring statistics in hns_nic_tx_poll_one() to
fix the bug.
Signed-off-by: NLiubin Shu <shuliubin@huawei.com>
Signed-off-by: NZhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 1c41860864c8ae0387ef7d44f0000e99cbb2e06d ]

When doing unwind_frame() in the context of pseudo nmi (need enable
CONFIG_ARM64_PSEUDO_NMI), reaching the bottom of the stack (fp == 0,
pc != 0), function on_sdei_stack() will return true while the sdei acpi
table is not inited in fact. This will cause a "NULL pointer dereference"
oops when going on.
Reviewed-by: NJulien Thierry <julien.thierry@arm.com>
Signed-off-by: NWei Li <liwei391@huawei.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit ba5e60c9b75dec92d4c695b928f69300b17d7686 ]

of_find_device_by_node() takes a reference to the struct device
when it finds a match via get_device. When returning error we should
call put_device.
Reviewed-by: NMukesh Ojha <mojha@codeaurora.org>
Signed-off-by: NPeng Hao <peng.hao2@zte.com.cn>
Signed-off-by: NLudovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 382e06d11e075a40b4094b6ef809f8d4bcc7ab2a ]

When the number of sub-channels offered by Hyper-V is >= the number of CPUs
in the VM, calculate the correct number of sub-channels.  The current code
produces one too many.

This scenario arises only when the number of CPUs is artificially
restricted (for example, with maxcpus=<n> on the kernel boot line), because
Hyper-V normally offers a sub-channel count < number of CPUs.  While the
current code doesn't break, the extra sub-channel is unbalanced across the
CPUs (for example, a total of 5 channels on a VM with 4 CPUs).
Signed-off-by: NMichael Kelley <mikelley@microsoft.com>
Reviewed-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: NLong Li <longli@microsoft.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>

[ Upstream commit 1cb1d2c64e812928fe0a40b8f7e74523d0283dbe ]

Blacklist "Universal Xport" LUN. It's used for in-band storage array
management.  Also add model to the rdac dh family.

Cc: Martin Wilck <mwilck@suse.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: NetApp RDAC team <ng-eseries-upstream-maintainers@netapp.com>
Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: SCSI ML <linux-scsi@vger.kernel.org>
Cc: DM ML <dm-devel@redhat.com>
Signed-off-by: NXose Vazquez Perez <xose.vazquez@gmail.com>
Reviewed-by: NMartin Wilck <mwilck@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>