For asynchronous operation, SGs are allocated without a page mapped to
them or with a page that is not used (ref-counted). If the SGL is freed,
the code must only call put_page for an SG if there was a page assigned
and ref-counted in the first place.

This fixes a kernel crash when using io_submit with more than one iocb
using the sendmsg and sendpage (vmsplice/splice) interface.

Cc: <stable@vger.kernel.org>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

We failed to catch a bug in the chacha20 code after porting it to the
skcipher API. We would have caught it if any chunked tests had been
defined, so define some now so we will catch future regressions.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Commit 9ae433bc79f9 ("crypto: chacha20 - convert generic and x86 versions
to skcipher") ported the existing chacha20 code to use the new skcipher
API, and introduced a bug along the way. Unfortunately, the tcrypt tests
did not catch the error, and it was only found recently by Tobias.

Stefan kindly diagnosed the error, and proposed a fix which is similar
to the one below, with the exception that 'walk.stride' is used rather
than the hardcoded block size. This does not actually matter in this
case, but it's a better example of how to use the skcipher walk API.

Fixes: 9ae433bc79f9 ("crypto: chacha20 - convert generic and x86 ...")
Cc: <stable@vger.kernel.org> # v4.11+
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Reported-by: Tobias Brunner <tobias@strongswan.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

When authencesn is used together with digest_null a crash will
occur on the decrypt path.  This is because normally we perform
a special setup to preserve the ESN, but this is skipped if there
is no authentication.  However, on the post-authentication path
it always expects the preservation to be in place, thus causing
a crash when digest_null is used.

This patch fixes this by also skipping the post-processing when
there is no authentication.

Fixes: 104880a6b470 ("crypto: authencesn - Convert to new AEAD...")
Cc: <stable@vger.kernel.org>
Reported-by: Jan Tluka <jtluka@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Pull crypto fixes from Herbert Xu:

 - fix new compiler warnings in cavium

 - set post-op IV properly in caam (this fixes chaining)

 - fix potential use-after-free in atmel in case of EBUSY

 - fix sleeping in softirq path in chcr

 - disable buggy sha1-avx2 driver (may overread and page fault)

 - fix use-after-free on signals in caam

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: cavium - make several functions static
  crypto: chcr - Avoid algo allocation in softirq.
  crypto: caam - properly set IV after {en,de}crypt
  crypto: atmel - only treat EBUSY as transient if backlog
  crypto: af_alg - Avoid sock_graft call warning
  crypto: caam - fix signals handling
  crypto: sha1-ssse3 - Disable avx2

crypto: af_alg - Avoid sock_graft call warning

The newly added sock_graft warning triggers in af_alg_accept.
It's harmless as we're essentially doing sock->sk = sock->sk.

The sock_graft call is actually redundant because all the work
it does is subsumed by sock_init_data.  However, it was added
to placate SELinux as it uses it to initialise its internal state.

This patch avoisd the warning by making the SELinux call directly.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: David S. Miller <davem@davemloft.net>

Pull dmaengine updates from Vinod Koul:

 - removal of AVR32 support in dw driver as AVR32 is gone

 - new driver for Broadcom stream buffer accelerator (SBA) RAID driver

 - add support for Faraday Technology FTDMAC020 in amba-pl08x driver

 - IOMMU support in pl330 driver

 - updates to bunch of drivers

* tag 'dmaengine-4.13-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (36 commits)
  dmaengine: qcom_hidma: correct API violation for submit
  dmaengine: zynqmp_dma: Remove max len check in zynqmp_dma_prep_memcpy
  dmaengine: tegra-apb: Really fix runtime-pm usage
  dmaengine: fsl_raid: make of_device_ids const.
  dmaengine: qcom_hidma: allow ACPI/DT parameters to be overridden
  dmaengine: fsldma: set BWC, DAHTS and SAHTS values correctly
  dmaengine: Kconfig: Simplify the help text for MXS_DMA
  dmaengine: pl330: Delete unused functions
  dmaengine: Replace WARN_TAINT_ONCE() with pr_warn_once()
  dmaengine: Kconfig: Extend the dependency for MXS_DMA
  dmaengine: mxs: Use %zu for printing a size_t variable
  dmaengine: ste_dma40: Cleanup scatterlist layering violations
  dmaengine: imx-dma: cleanup scatterlist layering violations
  dmaengine: use proper name for the R-Car SoC
  dmaengine: imx-sdma: Fix compilation warning.
  dmaengine: imx-sdma: Handle return value of clk_prepare_enable
  dmaengine: pl330: Add IOMMU support to slave tranfers
  dmaengine: DW DMAC: Handle return value of clk_prepare_enable
  dmaengine: pl08x: use GENMASK() to create bitmasks
  dmaengine: pl08x: Add support for Faraday Technology FTDMAC020
  ...

Pull networking updates from David Miller:
 "Reasonably busy this cycle, but perhaps not as busy as in the 4.12
  merge window:

   1) Several optimizations for UDP processing under high load from
      Paolo Abeni.

   2) Support pacing internally in TCP when using the sch_fq packet
      scheduler for this is not practical. From Eric Dumazet.

   3) Support mutliple filter chains per qdisc, from Jiri Pirko.

   4) Move to 1ms TCP timestamp clock, from Eric Dumazet.

   5) Add batch dequeueing to vhost_net, from Jason Wang.

   6) Flesh out more completely SCTP checksum offload support, from
      Davide Caratti.

   7) More plumbing of extended netlink ACKs, from David Ahern, Pablo
      Neira Ayuso, and Matthias Schiffer.

   8) Add devlink support to nfp driver, from Simon Horman.

   9) Add RTM_F_FIB_MATCH flag to RTM_GETROUTE queries, from Roopa
      Prabhu.

  10) Add stack depth tracking to BPF verifier and use this information
      in the various eBPF JITs. From Alexei Starovoitov.

  11) Support XDP on qed device VFs, from Yuval Mintz.

  12) Introduce BPF PROG ID for better introspection of installed BPF
      programs. From Martin KaFai Lau.

  13) Add bpf_set_hash helper for TC bpf programs, from Daniel Borkmann.

  14) For loads, allow narrower accesses in bpf verifier checking, from
      Yonghong Song.

  15) Support MIPS in the BPF selftests and samples infrastructure, the
      MIPS eBPF JIT will be merged in via the MIPS GIT tree. From David
      Daney.

  16) Support kernel based TLS, from Dave Watson and others.

  17) Remove completely DST garbage collection, from Wei Wang.

  18) Allow installing TCP MD5 rules using prefixes, from Ivan
      Delalande.

  19) Add XDP support to Intel i40e driver, from Björn Töpel

  20) Add support for TC flower offload in nfp driver, from Simon
      Horman, Pieter Jansen van Vuuren, Benjamin LaHaise, Jakub
      Kicinski, and Bert van Leeuwen.

  21) IPSEC offloading support in mlx5, from Ilan Tayari.

  22) Add HW PTP support to macb driver, from Rafal Ozieblo.

  23) Networking refcount_t conversions, From Elena Reshetova.

  24) Add sock_ops support to BPF, from Lawrence Brako. This is useful
      for tuning the TCP sockopt settings of a group of applications,
      currently via CGROUPs"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1899 commits)
  net: phy: dp83867: add workaround for incorrect RX_CTRL pin strap
  dt-bindings: phy: dp83867: provide a workaround for incorrect RX_CTRL pin strap
  cxgb4: Support for get_ts_info ethtool method
  cxgb4: Add PTP Hardware Clock (PHC) support
  cxgb4: time stamping interface for PTP
  nfp: default to chained metadata prepend format
  nfp: remove legacy MAC address lookup
  nfp: improve order of interfaces in breakout mode
  net: macb: remove extraneous return when MACB_EXT_DESC is defined
  bpf: add missing break in for the TCP_BPF_SNDCWND_CLAMP case
  bpf: fix return in load_bpf_file
  mpls: fix rtm policy in mpls_getroute
  net, ax25: convert ax25_cb.refcount from atomic_t to refcount_t
  net, ax25: convert ax25_route.refcount from atomic_t to refcount_t
  net, ax25: convert ax25_uid_assoc.refcount from atomic_t to refcount_t
  net, sctp: convert sctp_ep_common.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_transport.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_chunk.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_datamsg.refcnt from atomic_t to refcount_t
  net, sctp: convert sctp_auth_bytes.refcnt from atomic_t to refcount_t
  ...

Pull crypto updates from Herbert Xu:
 "Algorithms:
   - add private key generation to ecdh

  Drivers:
   - add generic gcm(aes) to aesni-intel
   - add SafeXcel EIP197 crypto engine driver
   - add ecb(aes), cfb(aes) and ecb(des3_ede) to cavium
   - add support for CNN55XX adapters in cavium
   - add ctr mode to chcr
   - add support for gcm(aes) to omap"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (140 commits)
  crypto: testmgr - Reenable sha1/aes in FIPS mode
  crypto: ccp - Release locks before returning
  crypto: cavium/nitrox - dma_mapping_error() returns bool
  crypto: doc - fix typo in docs
  Documentation/bindings: Document the SafeXel cryptographic engine driver
  crypto: caam - fix gfp allocation flags (part II)
  crypto: caam - fix gfp allocation flags (part I)
  crypto: drbg - Fixes panic in wait_for_completion call
  crypto: caam - make of_device_ids const.
  crypto: vmx - remove unnecessary check
  crypto: n2 - make of_device_ids const
  crypto: inside-secure - use the base_end pointer in ring rollback
  crypto: inside-secure - increase the batch size
  crypto: inside-secure - only dequeue when needed
  crypto: inside-secure - get the backlog before dequeueing the request
  crypto: inside-secure - stop requeueing failed requests
  crypto: inside-secure - use one queue per hw ring
  crypto: inside-secure - update the context and request later
  crypto: inside-secure - align the cipher and hash send functions
  crypto: inside-secure - optimize DSE bufferability control
  ...

Merge the crypto tree to pull in fixes for the next merge window.