This reverts commit 5e3c0220.
We have a better fix commited for this now.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Because the CMB BAR has a min_access_size of 2, if you read the last
byte it will try to memcpy *2* bytes from n->cmbuf, causing an off-by-one
error.  This is CVE-2018-16847.

Another way to fix this might be to register the CMB as a RAM memory
region, which would also be more efficient.  However, that might be a
change for big-endian machines; I didn't think this through and I don't
know how real hardware works.  Add a basic testcase for the CMB in case
somebody does this change later on.

Cc: Keith Busch <keith.busch@intel.com>
Cc: qemu-block@nongnu.org
Reported-by: NLi Qiang <liq3ea@gmail.com>
Reviewed-by: NLi Qiang <liq3ea@gmail.com>
Tested-by: NLi Qiang <liq3ea@gmail.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

When blk_flush called in NVMe reset path S/C queues are already freed
which means that re-entering AIO handling loop having some IO requests
unfinished will lockup or crash as their SG structures being potentially
reused. Call blk_drain before freeing the queues to avoid this nasty
scenario.
Signed-off-by: NIgor Druzhinin <igor.druzhinin@citrix.com>
Acked-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

The first qemu-io command must honour the $IMGFMT that is set rather
than hardcoding qcow2. The qemu-nbd commands should also set $IMGFMT
to avoid the insecure format probe warning.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Commit e35bdc12 added the auto-read-only option and the
code to update its corresponding flag in update_flags_from_options(),
but forgot to clear the flag if auto-read-only is false.
Signed-off-by: NAlberto Garcia <berto@igalia.com>
Reported-by: NMax Reitz <mreitz@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Commit 40dce4ee "scsi-disk: fix rerror/werror=ignore" introduced a
bug which causes qemu to crash with the assertion error below if the
host file or disk returns an error:

  qemu-system-x86_64: hw/scsi/scsi-bus.c:1374: scsi_req_complete:
  Assertion `req->status == -1' failed.

Kevin Wolf suggested this fix:

  < kwolf> Hm, should the final return false; in that patch
           actually be a return true?
  < kwolf> Because I think he didn't intend to change anything
           except BLOCK_ERROR_ACTION_IGNORE

Buglink: https://bugs.launchpad.net/qemu/+bug/1804323
Fixes: 40dce4eeSigned-off-by: NRichard W.M. Jones <rjones@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

create_opts was leaked here.  This is not too bad since the process is
about to exit anyway, but relying on that does not make the code nicer
to read.

Fixes: d402b6a2Reported-by: NKevin Wolf <kwolf@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Fixes: d402b6a2Reported-by: NKevin Wolf <kwolf@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

The use of TLS while building qemu is optional. While the
'certtool' binary should be available on every platform that
supports building against TLS, that does not imply that the
developer has installed it.  Make the test gracefully skip
in that case.
Reported-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NWainer dos Santos Moschetta <wainersm@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

TestCase.assertEquals() is deprecated since Python 2.7. Recent Python
versions print a warning when the function is called, which makes test
cases fail.

Replace it with the preferred spelling assertEqual().
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>

time.clock() is deprecated since Python 3.3. Current Python versions
warn that the function will be removed in Python 3.8, and those warnings
make the test case 118 fail.

Replace it with the Timeout mechanism that is compatible with both
Python 2 and 3, and makes the code even a little nicer.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>

Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

pc-*-3.1 machine-types

# gpg: Signature made Tue 20 Nov 2018 13:43:24 GMT
# gpg:                using RSA key 2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-for-3.1-pull-request:
  hw/i386: add pc-i440fx-3.1 & pc-q35-3.1
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

We have a couple of PC_COMPAT_3_0, so we should have 3.1 PC machines,
and update the 3.0 machines to make use of those.

Fixes a "Known issue" from https://wiki.qemu.org/Planning/3.1.
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Message-Id: <20181120132604.22854-1-marcandre.lureau@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>

Fixes yet another use-after-free issue that could be triggered by a
misbehaving guest. This is a follow-up to commit:

commit 5b76ef50
Author: Greg Kurz <groug@kaod.org>
Date:   Wed Nov 7 01:00:04 2018 +0100

    9p: write lock path in v9fs_co_open2()

# gpg: Signature made Tue 20 Nov 2018 12:01:07 GMT
# gpg:                using RSA key 71D4D5E5822F73D6
# gpg: Good signature from "Greg Kurz <groug@kaod.org>"
# gpg:                 aka "Gregory Kurz <gregory.kurz@free.fr>"
# gpg:                 aka "[jpeg image of size 3330]"
# Primary key fingerprint: B482 8BAF 9431 40CE F2A3  4910 71D4 D5E5 822F 73D6

* remotes/gkurz/tags/for-upstream:
  9p: take write lock on fid path updates (CVE-2018-19364)
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Recent commit 5b76ef50 fixed a race where v9fs_co_open2() could
possibly overwrite a fid path with v9fs_path_copy() while it is being
accessed by some other thread, ie, use-after-free that can be detected
by ASAN with a custom 9p client.

It turns out that the same can happen at several locations where
v9fs_path_copy() is used to set the fid path. The fix is again to
take the write lock.

Fixes CVE-2018-19364.

Cc: P J P <ppandit@redhat.com>
Reported-by: Nzhibin hu <noirfate@gmail.com>
Reviewed-by: NPrasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: NGreg Kurz <groug@kaod.org>

- One additional simple qmp-test
- A fix for ide-test
- Add logging of QEMU parameters in libqtest

# gpg: Signature made Tue 20 Nov 2018 10:47:12 GMT
# gpg:                using RSA key 2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>"
# gpg:                 aka "Thomas Huth <thuth@redhat.com>"
# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>"
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>"
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3  EAB9 2ED9 D774 FE70 2DB5

* remotes/huth-gitlab/tags/pull-request-2018-11-20:
  qtest: log QEMU command line
  tests/ide: Free pcibus when finishing a test
  tests: add qmp/missing-any-arg test
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

seabios: update to 1.12-final

# gpg: Signature made Tue 20 Nov 2018 06:01:21 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/seabios-1.12-20181120-pull-request:
  update seabios to 1.12
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Record the command line that was used to start QEMU.  This can be
useful for debugging.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NLaurent Vivier <lvivier@redhat.com>
[thuth: removed trailing \n from the message string]
Signed-off-by: NThomas Huth <thuth@redhat.com>

Seabios 1.12 has been released yesterday.  Update
our snapshot builds to the final release.

git shortlog
============

Kevin O'Connor (2):
      shadow: Rework bios copy code to prevent gcc array-bounds warning
      docs: Note v1.12.0 release

Shmuel Eiderman (1):
      pvscsi: Scan all 64 possible targets
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Once a test has finished, the pcibus structure should be freed, to
avoid leaking memory and to make sure that the structure is properly
re-initialized when the next test starts.
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Signed-off-by: NThomas Huth <thuth@redhat.com>

test_qmp_missing_any_arg() is about a bug in infrastructure used by
the QMP core, fixed in commit c4897802.  We covered the bug in
infrastructure unit tests (commit bce3035a).  Let's test
it at the QMP level as well.
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
[thuth: Tweaked the commit message according to Markus' suggestion]
Signed-off-by: NThomas Huth <thuth@redhat.com>

nbd patches for 2018-11-19

Add iotest coverage for NBD connections using TLS, including
a couple of code fixes that it pointed out

- Mao Zhongyi: 0/3 Do some cleaning work in qemu-iotests
- Daniel P. Berrangé: io: return 0 for EOF in TLS session read after shutdown
- Daniel P. Berrangé: 0/6 Misc fixes to NBD
- Eric Blake: iotests: Drop use of bash keyword 'function'

# gpg: Signature made Mon 19 Nov 2018 17:43:32 GMT
# gpg:                using RSA key A7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>"
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>"
# gpg:                 aka "[jpeg image of size 6874]"
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2018-11-19:
  iotests: Drop use of bash keyword 'function'
  iotests: Also test I/O over NBD TLS
  tests: exercise NBD server in TLS mode
  tests: add iotests helpers for dealing with TLS certificates
  tests: check if qemu-nbd is still alive before waiting
  tests: pull qemu-nbd iotest helpers into common.nbd file
  io: return 0 for EOF in TLS session read after shutdown
  nbd/server: Ignore write errors when replying to NBD_OPT_ABORT
  nbd: fix whitespace in server error message
  qemu-iotests: Modern shell scripting (use $() instead of ``)
  qemu-iotests: convert `pwd` and $(pwd) to $PWD
  qemu-iotests: remove unused variable 'here'
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Bash allows functions to be declared with or without the leading
keyword 'function'; but including the keyword does not comply with
POSIX syntax, and is confusing to ksh users where the use of the
keyword changes the scoping rules for functions.  Stick to the
POSIX form through iotests.

Done mechanically with:
  sed -i 's/^function //' $(git ls-files tests/qemu-iotests)
Signed-off-by: NEric Blake <eblake@redhat.com>
Message-Id: <20181116215002.2124581-1-eblake@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>

Enhance test 233 to also perform I/O beyond the initial handshake.
Signed-off-by: NEric Blake <eblake@redhat.com>
Message-Id: <20181118022403.2211483-1-eblake@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

Add tests that validate it is possible to connect to an NBD server
running TLS mode. Also test mis-matched TLS vs non-TLS connections
correctly fail.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20181116155325.22428-7-berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Tested-by: NEric Blake <eblake@redhat.com>
[eblake: rebase to iotests shell cleanups, use ss instead of socat for
port probing, sanitize port number in expected output]
Signed-off-by: NEric Blake <eblake@redhat.com>

Add helpers to common.tls for creating TLS certificates for a CA,
server and client.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20181116155325.22428-6-berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
[eblake: spelling and quoting touchups]
Signed-off-by: NEric Blake <eblake@redhat.com>

If the qemu-nbd UNIX socket has not shown up, the tests will sleep a bit
and then check again repeatedly for up to 30 seconds. This is pointless
if the qemu-nbd process has quit due to an error, so check whether the
pid is still alive before waiting and retrying.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20181116155325.22428-5-berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NEric Blake <eblake@redhat.com>

The helpers for starting/stopping qemu-nbd in 058 will be useful in
other test cases, so move them into a common.nbd file.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20181116155325.22428-4-berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
[eblake: fix shell quoting]
Signed-off-by: NEric Blake <eblake@redhat.com>

GNUTLS takes a paranoid approach when seeing 0 bytes returned by the
underlying OS read() function. It will consider this an error and
return GNUTLS_E_PREMATURE_TERMINATION instead of propagating the 0
return value. It expects apps to arrange for clean termination at
the protocol level and not rely on seeing EOF from a read call to
detect shutdown. This is to harden apps against a malicious 3rd party
causing termination of the sockets layer.

This is unhelpful for the QEMU NBD code which does have a clean
protocol level shutdown, but still relies on seeing 0 from the I/O
channel read in the coroutine handling incoming replies.

The upshot is that when using a plain NBD connection shutdown is
silent, but when using TLS, the client spams the console with

  Cannot read from TLS channel: Broken pipe

The NBD connection has, however, called qio_channel_shutdown()
at this point to indicate that it is done with I/O. This gives
the opportunity to optimize the code such that when the channel
has been shutdown in the read direction, the error code
GNUTLS_E_PREMATURE_TERMINATION gets turned into a '0' return
instead of an error.
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20181119134228.11031-1-berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NEric Blake <eblake@redhat.com>

Commit 37ec36f6 intentionally ignores errors when trying to reply
to an NBD_OPT_ABORT request for plaintext clients, but did not make
the same change for a TLS server.  Since NBD_OPT_ABORT is
documented as being a potential for an EPIPE when the client hangs
up without waiting for our reply, we don't need to pollute the
server's output with that failure.
Signed-off-by: NEric Blake <eblake@redhat.com>
Message-Id: <20181117223221.2198751-1-eblake@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

A space was missing after the option number was printed:

  Option 0x8not permitted before TLS

becomes

  Option 0x8 not permitted before TLS

This fixes

  commit 36683283
  Author: Eric Blake <eblake@redhat.com>
  Date:   Fri Oct 14 13:33:09 2016 -0500

    nbd: Send message along with server NBD_REP_ERR errors
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
Message-Id: <20181116155325.22428-2-berrange@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
[eblake: move lone space to next line]
Signed-off-by: NEric Blake <eblake@redhat.com>

Various shell files contain a mix between obsolete ``
and modern $(); It would be nice to convert to using
$() everywhere.  For now, just do the qemu-iotests directory.

Cc: kwolf@redhat.com
Cc: mreitz@redhat.com
Cc: eblake@redhat.com
Suggested-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NMao Zhongyi <maozhongyi@cmss.chinamobile.com>
Message-Id: <20181024094051.4470-4-maozhongyi@cmss.chinamobile.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
[eblake: tweak commit message]
Signed-off-by: NEric Blake <eblake@redhat.com>

POSIX requires $PWD to be reliable, and we expect all
shells used by qemu scripts to be relatively close to
POSIX.  Thus, it is smarter to avoid forking the pwd
executable for something that is already available in
the environment.

So replace it with the following:

sed -i 's/\(`pwd`\|\$(pwd)\)/$PWD/g' $(git grep -l pwd)

Then delete a pointless line assigning PWD to itself.

Cc: kwolf@redhat.com
Cc: mreitz@redhat.com
Cc: eblake@redhat.com
Suggested-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NMao Zhongyi <maozhongyi@cmss.chinamobile.com>
Message-Id: <20181024094051.4470-2-maozhongyi@cmss.chinamobile.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
[eblake: touch up commit message, reorder series, tweak a couple more files]
Signed-off-by: NEric Blake <eblake@redhat.com>

Running
git grep '\$here' tests/qemu-iotests

has 0 hits, which means we are setting a variable that has
no use.  It appears that commit e8f8624d removed the last
use.  So execute the following cmd to remove all of
the 'here=...' lines as dead code.

sed -i '/^here=/d' $(git grep -l '^here=' tests/qemu-iotests)

Cc: kwolf@redhat.com
Cc: mreitz@redhat.com
Cc: eblake@redhat.com
Suggested-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NMao Zhongyi <maozhongyi@cmss.chinamobile.com>
Message-Id: <20181024094051.4470-3-maozhongyi@cmss.chinamobile.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
[eblake: touch up commit message, reorder series, rebase to master]
Signed-off-by: NEric Blake <eblake@redhat.com>

target-arm queue:
 * various MAINTAINERS file updates
 * hw/block/onenand: use qemu_log_mask() for reporting
 * hw/block/onenand: Fix off-by-one error allowing out-of-bounds read
   on the n800 and n810 machine models
 * target/arm: fix smc incorrectly trapping to EL3 when secure is off
 * hw/arm/stm32f205: Fix the UART and Timer region size
 * target/arm: read ID registers for KVM guests so they can be
   used to gate "is feature X present" checks

# gpg: Signature made Mon 19 Nov 2018 15:56:44 GMT
# gpg:                using RSA key 3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20181119:
  MAINTAINERS: list myself as maintainer for various Arm boards
  hw/block/onenand: use qemu_log_mask() for reporting
  hw/block/onenand: Fix off-by-one error allowing out-of-bounds read
  target/arm: fix smc incorrectly trapping to EL3 when secure is off
  hw/arm/stm32f205: Fix the UART and Timer region size
  MAINTAINERS: Add entries for missing ARM boards
  target/arm: Fill in ARMISARegisters for kvm32
  target/arm: Introduce read_sys_reg32 for kvm32
  target/arm: Fill in ARMISARegisters for kvm64
  target/arm: Install ARMISARegisters from kvm host
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

In practice for most of the more-or-less orphan Arm board models,
I will review patches and put them in via the target-arm tree.
So list myself as an "Odd Fixes" status maintainer for them.

This commit downgrades these boards to "Odd Fixes":
 * Allwinner-A10
 * Exynos
 * Calxeda Highbank
 * Canon DIGIC
 * Musicpal
 * nSeries
 * Palm
 * PXA2xx

These boards were already "Odd Fixes":
 * Gumstix
 * i.MX31 (kzm)

Philippe Mathieu-Daudé has requested to be moved to R:
status for Gumstix now that I am listed as the M: contact.

Some boards are maintained, but their patches still go
via the target-arm tree, so add myself as a secondary
maintainer contact for those:
 * Xilinx Zynq
 * Xilinx ZynqMP
 * STM32F205
 * Netduino 2
 * SmartFusion2
 * Mecraft M2S-FG484
 * ASPEED BMCs
 * NRF51
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Message-id: 20181108134139.31666-1-peter.maydell@linaro.org

Update the onenand device to use qemu_log_mask() for reporting
guest errors and unimplemented features, rather than plain
fprintf() and hw_error().

(We leave the hw_error() in onenand_reset(), as that is
triggered by a failure to read the underlying block device
for the bootRAM, not by guest action.)
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Tested-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181115143535.5885-3-peter.maydell@linaro.org

An off-by-one error in a switch case in onenand_read() allowed
a misbehaving guest to read off the end of a block of memory.

NB: the onenand device is used only by the "n800" and "n810"
machines, which are usable only with TCG, not KVM, so this is
not a security issue.
Reported-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-id: 20181115143535.5885-2-peter.maydell@linaro.org
Suggested-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

This commit fixes a case where the CPU would try to go to EL3 when
executing an smc instruction, even though ARM_FEATURE_EL3 is false. This
case is raised when the PSCI conduit is set to smc, but the smc
instruction does not lead to a valid PSCI call.

QEMU crashes with an assertion failure latter on because of incoherent
mmu_idx.

This commit refactors the pre_smc helper by enumerating all the possible
way of handling an scm instruction, and covering the previously missing
case leading to the crash.

The following minimal test would crash before this commit:

.global _start
    .text
_start:
    ldr x0, =0xdeadbeef  ; invalid PSCI call
    smc #0

run with the following command line:

aarch64-linux-gnu-gcc -nostdinc -nostdlib -Wl,-Ttext=40000000 \
                      -o test test.s

qemu-system-aarch64 -M virt,virtualization=on,secure=off \
                    -cpu cortex-a57 -kernel test
Signed-off-by: NLuc Michel <luc.michel@greensocs.com>
Message-id: 20181117160213.18995-1-luc.michel@greensocs.com
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>