crypto_alloc_context() is only called by nitrox_skcipher_init(), which is
never called in atomic context.

crypto_alloc_context() calls dma_pool_alloc() with GFP_ATOMIC,
which is not necessary.
GFP_ATOMIC can be replaced with GFP_KERNEL.

This is found by a static analysis tool named DCNS written by myself.
I also manually check the kernel code before reporting it.
Signed-off-by: NJia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The cipher implementations of the kernel crypto API favor in-place
cipher operations. Thus, switch the CTR cipher operation in the DRBG to
perform in-place operations. This is implemented by using the output
buffer as input buffer and zeroizing it before the cipher operation to
implement a CTR encryption of a NULL buffer.

The speed improvement is quite visibile with the following comparison
using the LRNG implementation.

Without the patch set:

      16 bytes|           12.267661 MB/s|    61338304 bytes |  5000000213 ns
      32 bytes|           23.603770 MB/s|   118018848 bytes |  5000000073 ns
      64 bytes|           46.732262 MB/s|   233661312 bytes |  5000000241 ns
     128 bytes|           90.038042 MB/s|   450190208 bytes |  5000000244 ns
     256 bytes|          160.399616 MB/s|   801998080 bytes |  5000000393 ns
     512 bytes|          259.878400 MB/s|  1299392000 bytes |  5000001675 ns
    1024 bytes|          386.050662 MB/s|  1930253312 bytes |  5000001661 ns
    2048 bytes|          493.641728 MB/s|  2468208640 bytes |  5000001598 ns
    4096 bytes|          581.835981 MB/s|  2909179904 bytes |  5000003426 ns

With the patch set:

      16 bytes |         17.051142 MB/s |     85255712 bytes |  5000000854 ns
      32 bytes |         32.695898 MB/s |    163479488 bytes |  5000000544 ns
      64 bytes |         64.490739 MB/s |    322453696 bytes |  5000000954 ns
     128 bytes |        123.285043 MB/s |    616425216 bytes |  5000000201 ns
     256 bytes |        233.434573 MB/s |   1167172864 bytes |  5000000573 ns
     512 bytes |        384.405197 MB/s |   1922025984 bytes |  5000000671 ns
    1024 bytes |        566.313370 MB/s |   2831566848 bytes |  5000001080 ns
    2048 bytes |        744.518042 MB/s |   3722590208 bytes |  5000000926 ns
    4096 bytes |        867.501670 MB/s |   4337508352 bytes |  5000002181 ns
Signed-off-by: NStephan Mueller <smueller@chronox.de>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Merge mainline to pick up c7513c2a ("crypto/arm64: aes-ce-gcm -
add missing kernel_neon_begin/end pair").

Calling pmull_gcm_encrypt_block() requires kernel_neon_begin() and
kernel_neon_end() to be used since the routine touches the NEON
register file. Add the missing calls.

Also, since NEON register contents are not preserved outside of
a kernel mode NEON region, pass the key schedule array again.

Fixes: 7c50136a ("crypto: arm64/aes-ghash - yield NEON after every ...")
Acked-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>

Pull ext4 fixes from Ted Ts'o:
 "Some miscellaneous ext4 fixes for 4.18; one fix is for a regression
  introduced in 4.18-rc4.

  Sorry for the late-breaking pull. I was originally going to wait for
  the next merge window, but Eric Whitney found a regression introduced
  in 4.18-rc4, so I decided to push out the regression plus the other
  fixes now. (The other commits have been baking in linux-next since
  early July)"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix check to prevent initializing reserved inodes
  ext4: check for allocation block validity with block group locked
  ext4: fix inline data updates with checksums enabled
  ext4: clear mmp sequence number when remounting read-only
  ext4: fix false negatives *and* false positives in ext4_check_descriptors()

Anatoly Trosinenko reports that a corrupted squashfs image can cause a
kernel oops.  It turns out that squashfs can end up being confused about
negative fragment lengths.

The regular squashfs_read_data() does check for negative lengths, but
squashfs_read_metadata() did not, and the fragment size code just
blindly trusted the on-disk value.  Fix both the fragment parsing and
the metadata reading code.
Reported-by: NAnatoly Trosinenko <anatoly.trosinenko@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Phillip Lougher <phillip@squashfs.org.uk>
Cc: stable@kernel.org
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 8844618d: "ext4: only look at the bg_flags field if it is
valid" will complain if block group zero does not have the
EXT4_BG_INODE_ZEROED flag set.  Unfortunately, this is not correct,
since a freshly created file system has this flag cleared.  It gets
almost immediately after the file system is mounted read-write --- but
the following somewhat unlikely sequence will end up triggering a
false positive report of a corrupted file system:

   mkfs.ext4 /dev/vdc
   mount -o ro /dev/vdc /vdc
   mount -o remount,rw /dev/vdc

Instead, when initializing the inode table for block group zero, test
to make sure that itable_unused count is not too large, since that is
the case that will result in some or all of the reserved inodes
getting cleared.

This fixes the failures reported by Eric Whiteney when running
generic/230 and generic/231 in the the nojournal test case.

Fixes: 8844618d ("ext4: only look at the bg_flags field if it is valid")
Reported-by: NEric Whitney <enwlinux@gmail.com>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>

Pull random fixes from Ted Ts'o:
 "In reaction to the fixes to address CVE-2018-1108, some Linux
  distributions that have certain systemd versions in some cases
  combined with patches to libcrypt for FIPS/FEDRAMP compliance, have
  led to boot-time stalls for some hardware.

  The reaction by some distros and Linux sysadmins has been to install
  packages that try to do complicated things with the CPU and hope that
  leads to randomness.

  To mitigate this, if RDRAND is available, mix it into entropy provided
  by userspace. It won't hurt, and it will probably help"

* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: mix rdrand with entropy sent in from userspace

Pull GPIO fixes from Linus Walleij:
 "Just a smallish OF fix and a driver fix:

   - OF flag fix for special regulator flags

   - fix up the Uniphier IRQ callback"

* tag 'gpio-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: uniphier: set legitimate irq trigger type in .to_irq hook
  gpio: of: Handle fixed regulator flags properly

Pull MIPS fix from Paul Burton:
 "Here's one more MIPS fix, reverting an errata workaround that was
  merged for v4.18-rc2 but has since been found to cause system hangs on
  some BCM4718A1-based systems by the OpenWRT project"

* tag 'mips_fixes_4.18_5' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum"

Pull i2c fixes from Wolfram Sang:
 "Some driver bugfixes"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: imx: use open drain for recovery GPIO
  i2c: rcar: handle RXDMA HW behaviour on Gen3
  i2c: imx: Fix reinit_completion() use
  i2c: davinci: Avoid zero value of CLKH

Pull block fixes from Jens Axboe:
 "Bigger than usual at this time, mostly due to the O_DIRECT corruption
  issue and the fact that I was on vacation last week. This contains:

   - NVMe pull request with two fixes for the FC code, and two target
     fixes (Christoph)

   - a DIF bio reset iteration fix (Greg Edwards)

   - two nbd reply and requeue fixes (Josef)

   - SCSI timeout fixup (Keith)

   - a small series that fixes an issue with bio_iov_iter_get_pages(),
     which ended up causing corruption for larger sized O_DIRECT writes
     that ended up racing with buffered writes (Martin Wilck)"

* tag 'for-linus-20180727' of git://git.kernel.dk/linux-block:
  block: reset bi_iter.bi_done after splitting bio
  block: bio_iov_iter_get_pages: pin more pages for multi-segment IOs
  blkdev: __blkdev_direct_IO_simple: fix leak in error case
  block: bio_iov_iter_get_pages: fix size of last iovec
  nvmet: only check for filebacking on -ENOTBLK
  nvmet: fixup crash on NULL device path
  scsi: set timed out out mq requests to complete
  blk-mq: export setting request completion state
  nvme: if_ready checks to fail io to deleting controller
  nvmet-fc: fix target sgl list on large transfers
  nbd: handle unexpected replies better
  nbd: don't requeue the same request twice.

Merge misc fixes from Andrew Morton:
 "11 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  kvm, mm: account shadow page tables to kmemcg
  zswap: re-check zswap_is_full() after do zswap_shrink()
  include/linux/eventfd.h: include linux/errno.h
  mm: fix vma_is_anonymous() false-positives
  mm: use vma_init() to initialize VMAs on stack and data segments
  mm: introduce vma_init()
  mm: fix exports that inadvertently make put_page() EXPORT_SYMBOL_GPL
  ipc/sem.c: prevent queue.status tearing in semop
  mm: disallow mappings that conflict for devm_memremap_pages()
  kasan: only select SLUB_DEBUG with SYSFS=y
  delayacct: fix crash in delayacct_blkio_end() after delayacct init failure

Pull PCI fix from Bjorn Helgaas:
 "Fix a use-after-free error in fatal error recovery (Thomas Tai)"

* tag 'pci-v4.18-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/AER: Work around use-after-free in pcie_do_fatal_recovery()

Pull arm64 fixes from Will Deacon:
 "Inevitably, after saying that I hoped we would be done on the fixes
  front, a couple of issues have cropped up over the last week. Next
  time I'll stay schtum.

  We've fixed an over-eager BUILD_BUG_ON() which Arnd ran into with
  arndconfig, as well as ensuring that KPTI really is disabled on
  Thunder-X1, where the cure is worse than the disease (this regressed
  when we reworked the heterogeneous CPU feature checking).

  Summary:

   - Fix disabling of kpti on Thunder-X machines

   - Fix premature BUILD_BUG_ON() found with randconfig"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: fix vmemmap BUILD_BUG_ON() triggering on !vmemmap setups
  arm64: Check for errata before evaluating cpu features

This reverts commit 2a027b47 ("MIPS: BCM47XX: Enable 74K Core
ExternalSync for PCIe erratum").

Enabling ExternalSync caused a regression for BCM4718A1 (used e.g. in
Netgear E3000 and ASUS RT-N16): it simply hangs during PCIe
initialization. It's likely that BCM4717A1 is also affected.

I didn't notice that earlier as the only BCM47XX devices with PCIe I
own are:
1) BCM4706 with 2 x 14e4:4331
2) BCM4706 with 14e4:4360 and 14e4:4331
it appears that BCM4706 is unaffected.

While BCM5300X-ES300-RDS.pdf seems to document that erratum and its
workarounds (according to quotes provided by Tokunori) it seems not even
Broadcom follows them.

According to the provided info Broadcom should define CONF7_ES in their
SDK's mipsinc.h and implement workaround in the si_mips_init(). Checking
both didn't reveal such code. It *could* mean Broadcom also had some
problems with the given workaround.
Signed-off-by: NRafał Miłecki <rafal@milecki.pl>
Signed-off-by: NPaul Burton <paul.burton@mips.com>
Reported-by: NMichael Marley <michael@michaelmarley.com>
Patchwork: https://patchwork.linux-mips.org/patch/20032/
URL: https://bugs.openwrt.org/index.php?do=details&task_id=1688
Cc: Tokunori Ikegami <ikegami@allied-telesis.co.jp>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org

Pull drm fixes from Dave Airlie:
 "Not much happening this week which is good: two imx display fixes and
  one i915 quirk addition"

* tag 'drm-fixes-2018-07-27' of git://anongit.freedesktop.org/drm/drm:
  drm/i915/glk: Add Quirk for GLK NUC HDMI port issues.
  gpu: ipu-csi: Check for field type alternate
  drm/imx: imx-ldb: check if channel is enabled before printing warning
  drm/imx: imx-ldb: disable LDB on driver bind

Pull input fixes from Dmitry Torokhov:

 - a couple of new device IDs added to Elan i2c touchpad controller
   driver

 - another entry in i8042 reset quirk list

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: i8042 - add Lenovo LaVie Z to the i8042 reset list
  Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST
  MAINTAINERS: Add file patterns for serio device tree bindings
  Input: elan_i2c - add ACPI ID for lenovo ideapad 330

Pull tracing fixes from Steven Rostedt:
 "Various fixes to the tracing infrastructure:

   - Fix double free when the reg() call fails in
     event_trigger_callback()

   - Fix anomoly of snapshot causing tracing_on flag to change

   - Add selftest to test snapshot and tracing_on affecting each other

   - Fix setting of tracepoint flag on error that prevents probes from
     being deleted.

   - Fix another possible double free that is similar to
     event_trigger_callback()

   - Quiet a gcc warning of a false positive unused variable

   - Fix crash of partial exposed task->comm to trace events"

* tag 'trace-v4.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  kthread, tracing: Don't expose half-written comm when creating kthreads
  tracing: Quiet gcc warning about maybe unused link variable
  tracing: Fix possible double free in event_enable_trigger_func()
  tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure
  selftests/ftrace: Add snapshot and tracing_on test case
  ring_buffer: tracing: Inherit the tracing setting to next ring buffer
  tracing: Fix double free of event_trigger_data

Pull xfs fixes from Darrick Wong:

 - Fix some uninitialized variable errors

 - Fix an incorrect check in metadata verifiers

* tag 'xfs-4.18-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: properly handle free inodes in extent hint validators
  xfs: Initialize variables in xfs_alloc_get_rec before using them

After the bio has been updated to represent the remaining sectors, reset
bi_done so bio_rewind_iter() does not rewind further than it should.

This resolves a bio_integrity_process() failure on reads where the
original request was split.

Fixes: 63573e35 ("bio-integrity: Restore original iterator on verify stage")
Signed-off-by: NGreg Edwards <gedwards@ddn.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

Make use of the swap macro and remove unnecessary variable *tmp*.
This makes the code easier to read and maintain.

This code was detected with the help of Coccinelle.
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Make use of the swap macro and remove unnecessary variable *tmp*.
This makes the code easier to read and maintain.

This code was detected with the help of Coccinelle.
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Commit b73b7ac0 ("crypto: sha256_generic - add cra_priority") gave
sha256-generic and sha224-generic a cra_priority of 100, to match the
convention for generic implementations.  But sha256-arm64 and
sha224-arm64 also have priority 100, so their order relative to the
generic implementations became ambiguous.

Therefore, increase their priority to 125 so that they have higher
priority than the generic implementations but lower priority than the
NEON implementations which have priority 150.
Signed-off-by: NEric Biggers <ebiggers@google.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Do not define again the polynomial but use header with existing define.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Do not define again the polynomial but use header with existing define.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Do not define again the polynomial but use header with existing define.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Do not define again the polynomial but use header with existing define.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Header was defining CRCPOLY_LE/BE and CRC32C_POLY_LE but in fact all of
them are CRC-32 polynomials so use consistent naming.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Allow other drivers and parts of kernel to use the same define for
CRC32 polynomial, instead of duplicating it in many places.  This code
does not bring any functional changes, except moving existing code.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Add support for probing on ACPI systems, with ACPI HID QCOM8160.

On ACPI systems, clocks are always enabled, the PRNG should
already be enabled, and the register region is read-only.
The driver only verifies that the hardware is already
enabled never tries to disable or configure it.
Signed-off-by: NTimur Tabi <timur@codeaurora.org>
Tested-by: NJeffrey Hugo <jhugo@codeaurora.org>
[port to crypto API]
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Qcom 8996 and later chips features multiple Execution Environments
(EE) and secure world is typically responsible for configuring the
prng.

Add driver data for qcom,prng as 0 and qcom,prng-ee as 1 and use
that to skip initialization routine.
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Later qcom chips support v2 of the prng, which exposes an EE
(Execution Environment) for OS to use so add new compatible
qcom,prng-ee for this.
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This ports the Qcom prng from older hw_random driver.

No change of functionality and move from hw_random to crypto
APIs is done.
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Now that we are adding new driver for prng in crypto, move the
binding as well.
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This driver is for a psedo-rng so should not be added in hwrng.
Remove it so that it's replacement can be added.
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

The size of kvm's shadow page tables corresponds to the size of the
guest virtual machines on the system.  Large VMs can spend a significant
amount of memory as shadow page tables which can not be left as system
memory overhead.  So, account shadow page tables to the kmemcg.

[shakeelb@google.com: replace (GFP_KERNEL|__GFP_ACCOUNT) with GFP_KERNEL_ACCOUNT]
  Link: http://lkml.kernel.org/r/20180629140224.205849-1-shakeelb@google.com
Link: http://lkml.kernel.org/r/20180627181349.149778-1-shakeelb@google.comSigned-off-by: NShakeel Butt <shakeelb@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Peter Feiner <pfeiner@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

/sys/../zswap/stored_pages keeps rising in a zswap test with
"zswap.max_pool_percent=0" parameter.  But it should not compress or
store pages any more since there is no space in the compressed pool.

Reproduce steps:
  1. Boot kernel with "zswap.enabled=1"
  2. Set the max_pool_percent to 0
      # echo 0 > /sys/module/zswap/parameters/max_pool_percent
  3. Do memory stress test to see if some pages have been compressed
      # stress --vm 1 --vm-bytes $mem_available"M" --timeout 60s
  4. Watching the 'stored_pages' number increasing or not

The root cause is:

  When zswap_max_pool_percent is set to 0 via kernel parameter,
  zswap_is_full() will always return true due to zswap_shrink().  But if
  the shinking is able to reclain a page successfully the code then
  proceeds to compressing/storing another page, so the value of
  stored_pages will keep changing.

To solve the issue, this patch adds a zswap_is_full() check again after
  zswap_shrink() to make sure it's now under the max_pool_percent, and to
  not compress/store if we reached the limit.

Link: http://lkml.kernel.org/r/20180530103936.17812-1-liwang@redhat.comSigned-off-by: NLi Wang <liwang@redhat.com>
Acked-by: NDan Streetman <ddstreet@ieee.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Huang Ying <huang.ying.caritas@gmail.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The new gasket staging driver ran into a randconfig build failure when
CONFIG_EVENTFD is disabled:

  In file included from drivers/staging/gasket/gasket_interrupt.h:11,
                   from drivers/staging/gasket/gasket_interrupt.c:4:
  include/linux/eventfd.h: In function 'eventfd_ctx_fdget':
  include/linux/eventfd.h:51:9: error: implicit declaration of function 'ERR_PTR' [-Werror=implicit-function-declaration]

I can't see anything wrong with including eventfd.h before err.h, so the
easiest fix is to make it possible to do this by including the file
where it is needed.

Link: http://lkml.kernel.org/r/20180724110737.3985088-1-arnd@arndb.de
Fixes: 9a69f508 ("drivers/staging: Gasket driver framework + Apex driver")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>