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[Qemu-commits] [qemu/qemu] f8e09b: vhost: Add VIRTIO_NET_F_RSC_EXT to vh


From: Richard Henderson
Subject: [Qemu-commits] [qemu/qemu] f8e09b: vhost: Add VIRTIO_NET_F_RSC_EXT to vhost feature bits
Date: Tue, 20 Aug 2024 15:46:20 -0700

  Branch: refs/heads/master
  Home:   https://github.com/qemu/qemu
  Commit: f8e09b973ae8489b88394bff0118d19f989bf277
      
https://github.com/qemu/qemu/commit/f8e09b973ae8489b88394bff0118d19f989bf277
  Author: Akihiko Odaki <akihiko.odaki@daynix.com>
  Date:   2024-08-20 (Tue, 20 Aug 2024)

  Changed paths:
    M hw/net/vhost_net.c
    M net/vhost-vdpa.c

  Log Message:
  -----------
  vhost: Add VIRTIO_NET_F_RSC_EXT to vhost feature bits

VIRTIO_NET_F_RSC_EXT is implemented in the rx data path, which vhost
implements, so vhost needs to support the feature if it is ever to be
enabled with vhost. The feature must be disabled otherwise.

Fixes: 2974e916df87 ("virtio-net: support RSC v4/v6 tcp traffic for Windows 
HCK")
Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20240802-rsc-v1-1-2b607bd2f555@daynix.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>


  Commit: 7d14471a121878602cb4e748c4707f9ab9a9e3e2
      
https://github.com/qemu/qemu/commit/7d14471a121878602cb4e748c4707f9ab9a9e3e2
  Author: Volker RĂ¼melin <vr_qemu@t-online.de>
  Date:   2024-08-20 (Tue, 20 Aug 2024)

  Changed paths:
    M hw/audio/virtio-snd.c

  Log Message:
  -----------
  hw/audio/virtio-snd: fix invalid param check

Commit 9b6083465f ("virtio-snd: check for invalid param shift
operands") tries to prevent invalid parameters specified by the
guest. However, the code is not correct.

Change the code so that the parameters format and rate, which are
a bit numbers, are compared with the bit size of the data type.

Fixes: 9b6083465f ("virtio-snd: check for invalid param shift operands")
Signed-off-by: Volker RĂ¼melin <vr_qemu@t-online.de>
Message-Id: <20240802071805.7123-1-vr_qemu@t-online.de>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>


  Commit: a8e63ff289d137197ad7a701a587cc432872d798
      
https://github.com/qemu/qemu/commit/a8e63ff289d137197ad7a701a587cc432872d798
  Author: Cindy Lu <lulu@redhat.com>
  Date:   2024-08-20 (Tue, 20 Aug 2024)

  Changed paths:
    M hw/virtio/virtio-pci.c

  Log Message:
  -----------
  virtio-pci: Fix the use of an uninitialized irqfd

The crash was reported in MAC OS and NixOS, here is the link for this bug
https://gitlab.com/qemu-project/qemu/-/issues/2334
https://gitlab.com/qemu-project/qemu/-/issues/2321

In this bug, they are using the virtio_input device. The guest notifier was
not supported for this device, The function virtio_pci_set_guest_notifiers()
was not called, and the vector_irqfd was not initialized.

So the fix is adding the check for vector_irqfd in virtio_pci_get_notifier()

The function virtio_pci_get_notifier() can be used in various devices.
It could also be called when VIRTIO_CONFIG_S_DRIVER_OK is not set. In this 
situation,
the vector_irqfd being NULL is acceptable. We can allow the device continue to 
boot

If the vector_irqfd still hasn't been initialized after 
VIRTIO_CONFIG_S_DRIVER_OK
is set, it means that the function set_guest_notifiers was not called before the
driver started. This indicates that the device is not using the notifier.
At this point, we will let the check fail.

This fix is verified in vyatta,MacOS,NixOS,fedora system.

The bt tree for this bug is:
Thread 6 "CPU 0/KVM" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7c817be006c0 (LWP 1269146)]
kvm_virtio_pci_vq_vector_use () at ../qemu-9.0.0/hw/virtio/virtio-pci.c:817
817         if (irqfd->users == 0) {
(gdb) thread apply all bt
...
Thread 6 (Thread 0x7c817be006c0 (LWP 1269146) "CPU 0/KVM"):
0  kvm_virtio_pci_vq_vector_use () at ../qemu-9.0.0/hw/virtio/virtio-pci.c:817
1  kvm_virtio_pci_vector_use_one () at ../qemu-9.0.0/hw/virtio/virtio-pci.c:893
2  0x00005983657045e2 in memory_region_write_accessor () at 
../qemu-9.0.0/system/memory.c:497
3  0x0000598365704ba6 in access_with_adjusted_size () at 
../qemu-9.0.0/system/memory.c:573
4  0x0000598365705059 in memory_region_dispatch_write () at 
../qemu-9.0.0/system/memory.c:1528
5  0x00005983659b8e1f in flatview_write_continue_step.isra.0 () at 
../qemu-9.0.0/system/physmem.c:2713
6  0x000059836570ba7d in flatview_write_continue () at 
../qemu-9.0.0/system/physmem.c:2743
7  flatview_write () at ../qemu-9.0.0/system/physmem.c:2774
8  0x000059836570bb76 in address_space_write () at 
../qemu-9.0.0/system/physmem.c:2894
9  0x0000598365763afe in address_space_rw () at 
../qemu-9.0.0/system/physmem.c:2904
10 kvm_cpu_exec () at ../qemu-9.0.0/accel/kvm/kvm-all.c:2917
11 0x000059836576656e in kvm_vcpu_thread_fn () at 
../qemu-9.0.0/accel/kvm/kvm-accel-ops.c:50
12 0x0000598365926ca8 in qemu_thread_start () at 
../qemu-9.0.0/util/qemu-thread-posix.c:541
13 0x00007c8185bcd1cf in ??? () at /usr/lib/libc.so.6
14 0x00007c8185c4e504 in clone () at /usr/lib/libc.so.6

Fixes: 2ce6cff94d ("virtio-pci: fix use of a released vector")
Cc: qemu-stable@nongnu.org
Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20240806093715.65105-1-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>


  Commit: 9eb5bfbe3394b92fb37cc6f155ceea4d6c9e401c
      
https://github.com/qemu/qemu/commit/9eb5bfbe3394b92fb37cc6f155ceea4d6c9e401c
  Author: Richard Henderson <richard.henderson@linaro.org>
  Date:   2024-08-20 (Tue, 20 Aug 2024)

  Changed paths:
    M hw/audio/virtio-snd.c
    M hw/net/vhost_net.c
    M hw/virtio/virtio-pci.c
    M net/vhost-vdpa.c

  Log Message:
  -----------
  Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu 
into staging

virtio: regression fixes

3 small patches to make sure we don't ship regressions.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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# gpg: Signature made Tue 20 Aug 2024 08:59:27 PM AEST
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [undefined]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [undefined]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu:
  virtio-pci: Fix the use of an uninitialized irqfd
  hw/audio/virtio-snd: fix invalid param check
  vhost: Add VIRTIO_NET_F_RSC_EXT to vhost feature bits

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>


Compare: https://github.com/qemu/qemu/compare/075fd020afe3...9eb5bfbe3394

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