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Tsirkin" , Gerd Hoffmann Subject: [PATCH v1] virtio-snd: check for invalid param shift operands Date: Thu, 11 Jul 2024 10:38:49 +0300 Message-ID: X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::336; envelope-from=manos.pitsidianakis@linaro.org; helo=mail-wm1-x336.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1720683604562116300 Content-Type: text/plain; charset="utf-8" When setting the parameters of a PCM stream, we compute the bit flag with the format and rate values as shift operand to check if they are set in supported_formats and supported_rates. If the guest provides a format/rate value which when shifting 1 results in a value bigger than the number of bits in supported_formats/supported_rates, we must report an error. Previously, this ended up triggering the not reached assertions later when converting to internal QEMU values. Reported-by: Zheyu Ma Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2416 Signed-off-by: Manos Pitsidianakis Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- hw/audio/virtio-snd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c index 5993f4f040..98a7ef5719 100644 --- a/hw/audio/virtio-snd.c +++ b/hw/audio/virtio-snd.c @@ -282,11 +282,13 @@ 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 (!(supported_formats & BIT(params->format))) { + if (BIT(params->format) > sizeof(supported_formats) || + !(supported_formats & BIT(params->format))) { error_report("Stream format is not supported."); return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); } - if (!(supported_rates & BIT(params->rate))) { + if (BIT(params->rate) > sizeof(supported_rates) || + !(supported_rates & BIT(params->rate))) { error_report("Stream rate is not supported."); return cpu_to_le32(VIRTIO_SND_S_NOT_SUPP); } base-commit: 59084feb256c617063e0dbe7e64821ae8852d7cf --=20 =CE=B3=CE=B1=E1=BF=96=CE=B1 =CF=80=CF=85=CF=81=CE=AF =CE=BC=CE=B9=CF=87=CE= =B8=CE=AE=CF=84=CF=89