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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-21 21:21:26 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-21 21:21:26 +0200 |
| commit | 4b927bc37359dec23f67d3427fc982945f24f404 (patch) | |
| tree | 245449ef9146942dc7fffd0235b48b7e70a00bf2 /gitlab/issues/target_missing/host_missing/accel_missing/2805.toml | |
| parent | aa8bd79cec7bf6790ddb01d156c2ef2201abbaab (diff) | |
| download | emulator-bug-study-4b927bc37359dec23f67d3427fc982945f24f404.tar.gz emulator-bug-study-4b927bc37359dec23f67d3427fc982945f24f404.zip | |
add gitlab issues in toml format
Diffstat (limited to 'gitlab/issues/target_missing/host_missing/accel_missing/2805.toml')
| -rw-r--r-- | gitlab/issues/target_missing/host_missing/accel_missing/2805.toml | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gitlab/issues/target_missing/host_missing/accel_missing/2805.toml b/gitlab/issues/target_missing/host_missing/accel_missing/2805.toml new file mode 100644 index 00000000..4cd377bd --- /dev/null +++ b/gitlab/issues/target_missing/host_missing/accel_missing/2805.toml @@ -0,0 +1,30 @@ +id = 2805 +title = "vhost-device-snd does not report correctly the device conf size" +state = "closed" +created_at = "2025-02-06T18:04:06.905Z" +closed_at = "2025-02-21T23:15:13.433Z" +labels = ["device:virtio"] +url = "https://gitlab.com/qemu-project/qemu/-/issues/2805" +host-os = "Fedora 37" +host-arch = "x86" +qemu-version = "9.2.50 (v9.2.0-1537-gd922088eb4)" +guest-os = "Linux" +guest-arch = "x86" +description = """The vhost-user-snd frontend is incorrectly reporting the size of the device configuration space, which should be based on the features exposed by the device. For example, the `controls` field in the `virtio_snd_config` structure is optional and should only be included in the configuration size if the `VIRTIO_SND_F_CTLS` feature has been negotiated. + +This issue became apparent after commit `ab0c7fb2`, where `virtio_snd_config` was updated to include the `controls` field. The vhost-user-snd frontend, relying on this structure, started expecting `sizeof(virtio_snd_config)` when communicating with the backend, regardless of whether the `VIRTIO_SND_F_CTLS` feature was negotiated. As a result, any backend reporting a smaller configuration size—for example, one that does not support controls—cannot communicate with the frontend. We observed this problem in the vhost-device-sound rust-vmm device, which we partially fixed [here](https://github.com/rust-vmm/vhost-device/commit/8e7b7109316e1027548bc91cfcbb4b096b032c24). + +This behavior is incorrect because the configuration size should depend on the negotiated features. + +I am currently working on patch to fix this.""" +reproduce = """1. Run vhost-device-sound +```bash + cargo run --bin vhost-device-sound -- --socket=/tmp/vhost-sound.socket --backend=pipewire +``` +2. Run QEMU with the parameters above +3. In the guest run: +```bash +root@syzkaller:~# aplay /usr/share/sounds/alsa/Front_Left.wav +aplay: main:830: audio open error: No such file or directory +```""" +additional = """""" |