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

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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 Rümelin <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>
This commit is contained in:
Volker Rümelin 2024-08-02 09:18:05 +02:00 committed by Michael S. Tsirkin
parent f8e09b973a
commit 7d14471a12
1 changed files with 2 additions and 2 deletions
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4
hw/audio/virtio-snd.c
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@ -282,12 +282,12 @@ uint32_t virtio_snd_set_pcm_params(VirtIOSound *s,
error_report("Number of channels is not supported.");
return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP);
}
if (BIT(params->format) > sizeof(supported_formats) ||
if (params->format >= sizeof(supported_formats) * BITS_PER_BYTE ||
!(supported_formats & BIT(params->format))) {
error_report("Stream format is not supported.");
return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP);
}
if (BIT(params->rate) > sizeof(supported_rates) ||
if (params->rate >= sizeof(supported_rates) * BITS_PER_BYTE ||
!(supported_rates & BIT(params->rate))) {
error_report("Stream rate is not supported.");
return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP);