Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-2-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>

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# gpg: Signature made Fri 17 Feb 2023 05:37:28 GMT
# gpg:                using RSA key EF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F  3562 EF04 965B 398D 6211

* tag 'net-pull-request' of https://github.com/jasowang/qemu

:
  vdpa: fix VHOST_BACKEND_F_IOTLB_ASID flag check
  net: stream: add a new option to automatically reconnect
  vmnet: stop recieving events when VM is stopped
  net: Increase L2TPv3 buffer to fit jumboframes
  hw/net/vmxnet3: allow VMXNET3_MAX_MTU itself as a value
  hw/net/lan9118: log [read|write]b when mode_16bit is enabled rather than abort
  net: Replace "Supported NIC models" with "Available NIC models"
  net: Restore printing of the help text with "-nic help"
  net: Move the code to collect available NIC models to a separate function

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

Replace fork-based fuzzing with reboots.
Now the fuzzers will reboot the guest between inputs.

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# gpg: Signature made Fri 17 Feb 2023 04:04:10 GMT
# gpg:                using RSA key FAD4E2BF871375D6340517C44E661DDE583A964E
# gpg: Good signature from "Alexander Bulekov <alxndr@bu.edu>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: FAD4 E2BF 8713 75D6 3405  17C4 4E66 1DDE 583A 964E

* tag 'pr-2023-02-16' of https://gitlab.com/a1xndr/qemu

:
  docs/fuzz: remove mentions of fork-based fuzzing
  fuzz: remove fork-fuzzing scaffolding
  fuzz/i440fx: remove fork-based fuzzer
  fuzz/virtio-blk: remove fork-based fuzzer
  fuzz/virtio-net: remove fork-based fuzzer
  fuzz/virtio-scsi: remove fork-based fuzzer
  fuzz/generic-fuzz: add a limit on DMA bytes written
  fuzz/generic-fuzz: use reboots instead of forks to reset state
  fuzz: add fuzz_reset API
  hw/sparse-mem: clear memory on reset

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

VFIO updates 2023-02-16

 * Initial v2 migration support for vfio (Avihai Horon)

 * Add Cédric as vfio reviewer (Cédric Le Goater)

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# gpg: Signature made Thu 16 Feb 2023 21:03:17 GMT
# gpg:                using RSA key 42F6C04E540BD1A99E7B8A90239B9B6E3BB08B22
# gpg:                issuer "alex.williamson@redhat.com"
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex@shazbot.org>" [full]
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>" [full]
# Primary key fingerprint: 42F6 C04E 540B D1A9 9E7B  8A90 239B 9B6E 3BB0 8B22

* tag 'vfio-updates-20230216.0' of https://gitlab.com/alex.williamson/qemu

:
  MAINTAINERS: Add myself as VFIO reviewer
  docs/devel: Align VFIO migration docs to v2 protocol
  vfio: Alphabetize migration section of VFIO trace-events file
  vfio/migration: Remove VFIO migration protocol v1
  vfio/migration: Implement VFIO migration protocol v2
  vfio/migration: Rename functions/structs related to v1 protocol
  vfio/migration: Move migration v1 logic to vfio_migration_init()
  vfio/migration: Block multiple devices migration
  vfio/common: Change vfio_devices_all_running_and_saving() logic to equivalent one
  vfio/migration: Allow migration without VFIO IOMMU dirty tracking support
  vfio/migration: Fix NULL pointer dereference bug
  linux-headers: Update to v6.2-rc8

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

Remove C virtiofsd

We deprecated the C virtiofsd in commit 34deee7b
in v7.0 in favour of the Rust implementation at

  https://gitlab.com/virtio-fs/virtiofsd



since then, the Rust version has had more development and
has held up well.  It's time to say goodbye to the C version
that got us going.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

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# gpg: Signature made Thu 16 Feb 2023 18:24:25 GMT
# gpg:                using RSA key 45F5C71B4A0CB7FB977A9FA90516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>" [full]
# Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A  9FA9 0516 331E BC5B FDE7

* tag 'pull-virtiofs-20230216b' of https://gitlab.com/dagrh/qemu

:
  virtiofsd: Swing deprecated message to removed-features
  virtiofsd: Remove source
  virtiofsd: Remove build and docs glue
  virtiofsd: Remove test

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

Block layer patches

- configure: Enable -Wthread-safety if present
- no_co_wrapper to fix bdrv_open*() calls from coroutine context
- curl fixes, including enablement of newer libcurl versions
- MAINTAINERS: drop Vladimir from parallels block driver
- hbitmap: fix hbitmap_status() return value for first dirty bit case
- file-posix: Fix assertion failure in write_zeroes after moving
  bdrv_getlength() to co_wrapper

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# gpg: Signature made Fri 17 Feb 2023 13:34:37 GMT
# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* tag 'for-upstream' of https://repo.or.cz/qemu/kevin

: (22 commits)
  hbitmap: fix hbitmap_status() return value for first dirty bit case
  block/file-posix: don't use functions calling AIO_WAIT_WHILE in worker threads
  MAINTAINERS: drop Vladimir from parallels block driver
  block: temporarily hold the new AioContext of bs_top in bdrv_append()
  block: Handle curl 7.55.0, 7.85.0 version changes
  block: Assert non-coroutine context for bdrv_open_inherit()
  block: Fix bdrv_co_create_opts_simple() to open images with no_co_wrapper
  vpc: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  vmdk: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  vhdx: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  vdi: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  qed: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  qcow2: Fix open/create to open images with no_co_wrapper
  qcow: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  parallels: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  luks: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  block: Create no_co_wrappers for open functions
  block-coroutine-wrapper: Introduce no_co_wrapper
  curl: Fix error path in curl_open()
  configure: Enable -Wthread-safety if present
  ...

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

The last return statement should return true, as we already evaluated that
start == next_dirty

Also, fix hbitmap_status() description in header

Cc: qemu-stable@nongnu.org
Fixes: a6426475 ("block/dirty-bitmap: introduce bdrv_dirty_bitmap_status()")
Signed-off-by: Andrey Zhadchenko <andrey.zhadchenko@virtuozzo.com>
Message-Id: <20230202181523.423131-1-andrey.zhadchenko@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

When calling bdrv_getlength() in handle_aiocb_write_zeroes(), the
function creates a new coroutine and then waits that it finishes using
AIO_WAIT_WHILE.
The problem is that this function could also run in a worker thread,
that has a different AioContext from main loop and iothreads, therefore
in AIO_WAIT_WHILE we will have in_aio_context_home_thread(ctx) == false
and therefore
assert(qemu_get_current_aio_context() == qemu_get_aio_context());
in the else branch will fail, crashing QEMU.

Aside from that, bdrv_getlength() is wrong also conceptually, because
it reads the BDS graph from another thread and is not protected by
any lock.

Replace it with raw_co_getlength, that doesn't create a coroutine and
doesn't read the BDS graph.

Reported-by: Ninad Palsule <ninad@linux.vnet.ibm.com>
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230209154522.1164401-1-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

I have to admit this is out of my scope now. Still feel free to Cc me
directly if my help is needed :)

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20230214182848.1564714-1-vsementsov@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

bdrv_append() is called with bs_top AioContext held, but
bdrv_attach_child_noperm() could change the AioContext of bs_top.

bdrv_replace_node_noperm() calls bdrv_drained_begin() starting from
commit 23987471 ("block: Don't poll in bdrv_replace_child_noperm()").
bdrv_drained_begin() can call BDRV_POLL_WHILE that assumes the new lock
is taken, so let's temporarily hold the new AioContext to prevent QEMU
from failing in BDRV_POLL_WHILE when it tries to release the wrong
AioContext.

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2168209


Reported-by: Aihua Liang <aliang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20230214171621.11574-1-sgarzare@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

* 7.55.0 deprecates CURLINFO_CONTENT_LENGTH_DOWNLOAD in favour of a *_T
  version, which returns curl_off_t instead of a double.
* 7.85.0 deprecates CURLOPT_PROTOCOLS and CURLOPT_REDIR_PROTOCOLS in
  favour of *_STR variants, specifying the desired protocols via a
  string.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1440


Signed-off-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230123201431.23118-1-anjo@rev.ng>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-14-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

bdrv_co_create_opts_simple() runs in a coroutine. Therefore it is not
allowed to open images directly. Fix the call to use the corresponding
no_co_wrapper instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-13-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-12-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-11-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-10-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-9-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-8-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine, as does
qcow2_do_open(). Therefore they are not allowed to open images directly.
Fix the calls to use the corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-7-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-6-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-5-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

.bdrv_co_create implementations run in a coroutine. Therefore they are
not allowed to open images directly. Fix the calls to use the
corresponding no_co_wrappers instead.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-4-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Images can't be opened in coroutine context because opening needs to
change the block graph. Add no_co_wrappers so that coroutines have a
simple way of opening images in a BH instead.

At the same time, mark the wrapped functions as no_coroutine_fn.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-3-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Some functions must not be called from coroutine context. The common
pattern to use them anyway from a coroutine is running them in a BH and
letting the calling coroutine yield to be woken up when the BH is
completed.

Instead of manually writing such wrappers, add support for generating
them to block-coroutine-wrapper.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230126172432.436111-2-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

g_hash_table_destroy() and g_hash_table_foreach_remove() (called by
curl_drop_all_sockets()) both require the table to be non-NULL, or will
print assertion failures (just print, no abort).

There are several paths in curl_open() that can lead to the out_noclean
label without s->sockets being allocated, so clean it only if it has
been allocated.

Example reproducer:
$ qemu-img info -f http ''
qemu-img: GLib: g_hash_table_foreach_remove: assertion 'hash_table != NULL' failed
qemu-img: GLib: g_hash_table_destroy: assertion 'hash_table != NULL' failed
qemu-img: Could not open '': http curl driver cannot handle the URL '' (does not start with 'http://')

Closes: https://gitlab.com/qemu-project/qemu/-/issues/1475


Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230206132949.92917-1-hreitz@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

This enables clang's thread safety analysis (TSA), which we'll use to
statically check the block graph locking.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20221207131838.239125-9-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230117135203.3049709-4-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

FreeBSD implements pthread headers using TSA (thread safety analysis)
annotations, therefore when an application is compiled with
-Wthread-safety there are some locking/annotation requirements that the
user of the pthread API has to follow.

This will also be the case in QEMU, since bsd-user/mmap.c uses the
pthread API. Therefore when building it with -Wthread-safety the
compiler will throw warnings because the functions are not properly
annotated. We need TSA to be enabled because it ensures that the
critical sections of an annotated variable are properly locked.

In order to make the compiler happy and avoid adding all the necessary
macros to all callers (lock functions should use TSA_ACQUIRE, while
unlock TSA_RELEASE, and this applies to all users of pthread_mutex_lock
and pthread_mutex_unlock), simply use TSA_NO_TSA to supppress such
warnings.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230117135203.3049709-3-eesposit@redhat.com>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

FreeBSD implements pthread headers using TSA (thread safety analysis)
annotations, therefore when an application is compiled with
-Wthread-safety there are some locking/annotation requirements that the
user of the pthread API has to follow.

This will also be the case in QEMU, since util/qemu-thread-posix.c uses
the pthread API. Therefore when building it with -Wthread-safety, the
compiler will throw warnings because the functions are not properly
annotated. We need TSA to be enabled because it ensures that the
critical sections of an annotated variable are properly locked.

In order to make the compiler happy and avoid adding all the necessary
macros to all callers (lock functions should use TSA_ACQUIRE, while
unlock TSA_RELEASE, and this applies to all users of pthread_mutex_lock
and pthread_mutex_unlock), simply use TSA_NO_TSA to supppress such
warnings.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230117135203.3049709-2-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

VHOST_BACKEND_F_IOTLB_ASID is the feature bit, not the bitmask. Since
the device under test also provided VHOST_BACKEND_F_IOTLB_MSG_V2 and
VHOST_BACKEND_F_IOTLB_BATCH, this went unnoticed.

Fixes: c1a10086 ("vdpa: always start CVQ in SVQ mode if possible")
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

In stream mode, if the server shuts down there is currently
no way to reconnect the client to a new server without removing
the NIC device and the netdev backend (or to reboot).

This patch introduces a reconnect option that specifies a delay
to try to reconnect with the same parameters.

Add a new test in qtest to test the reconnect option and the
connect/disconnect events.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

When the VM is stopped using the HMP command "stop", soon the handler will
stop reading from the vmnet interface. This causes a flood of
`VMNET_INTERFACE_PACKETS_AVAILABLE` events to arrive and puts the host CPU
at 100%. We fix this by removing the event handler from vmnet when the VM
is no longer in a running state and restore it when we return to a running
state.

Signed-off-by: Joelle van Dyne <j@getutm.app>
Signed-off-by: Jason Wang <jasowang@redhat.com>

Increase the allocated buffer size to fit larger packets.
Given that jumboframes can commonly be up to 9000 bytes the closest suitable
value seems to be 16 KiB.

Tested by running qemu towards a Linux L2TPv3 endpoint and pushing
jumboframe traffic through the interfaces.

Signed-off-by: Christian Svensson <blue@cmd.nu>
Signed-off-by: Jason Wang <jasowang@redhat.com>

Currently, VMXNET3_MAX_MTU itself (being 9000) is not considered a
valid value for the MTU, but a guest running ESXi 7.0 might try to
set it and fail the assert [0].

In the Linux kernel, dev->max_mtu itself is a valid value for the MTU
and for the vmxnet3 driver it's 9000, so a guest running Linux will
also fail the assert when trying to set an MTU of 9000.

VMXNET3_MAX_MTU and s->mtu don't seem to be used in relation to buffer
allocations/accesses, so allowing the upper limit itself as a value
should be fine.

[0]: https://forum.proxmox.com/threads/114011/



Fixes: d05dcd94 ("net: vmxnet3: validate configuration values during activate (CVE-2021-20203)")
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

This patch replaces hw_error to guest error log for [read|write]b
accesses when mode_16bit is enabled. This avoids aborting qemu.

Fixes: 1248f8d4 ("hw/lan9118: Add basic 16-bit mode support.")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1433


Reported-by: Qiang Liu <cyruscyliu@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Qiang Liu <cyruscyliu@gmail.com>
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>

Just because a NIC model is compiled into the QEMU binary does not
necessary mean that it can be used with each and every machine.
So let's rather talk about "available" models instead of "supported"
models, just to avoid confusion.

Reviewed-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

Running QEMU with "-nic help" used to work in QEMU 5.2 and earlier versions
(it showed the available netdev backends), but this feature got broken during
some refactoring in version 6.0. Let's restore the old behavior, and while
we're at it, let's also print the available NIC models here now since this
option can be used to configure both, netdev backend and model in one go.

Fixes: ad6f932f ("net: do not exit on "netdev_add help" monitor command")
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

The code that collects the available NIC models is not really specific
to PCI anymore and will be required in the next patch, too, so let's
move this into a new separate function in net.c instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>

Fork-fuzzing provides a few pros, but our implementation prevents us
from using fuzzers other than libFuzzer, and may be causing issues such
as coverage-failure builds on OSS-Fuzz. It is not a great long-term
solution as it depends on internal implementation details of libFuzzer
(which is no longer in active development). Remove it in favor of other
methods of resetting state between inputs.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>