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Thu, 21 Nov 2024 21:03:27 -0800 (PST) From: Akihiko Odaki Date: Fri, 22 Nov 2024 14:03:11 +0900 Subject: [PATCH v3 5/6] virtio-net: Initialize hash reporting values MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241122-queue-v3-5-f2ff03b8dbfd@daynix.com> References: <20241122-queue-v3-0-f2ff03b8dbfd@daynix.com> In-Reply-To: <20241122-queue-v3-0-f2ff03b8dbfd@daynix.com> To: Jason Wang , "Michael S. Tsirkin" Cc: qemu-devel@nongnu.org, devel@daynix.com, Akihiko Odaki X-Mailer: b4 0.14-dev-fd6e3 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+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::c30; envelope-from=akihiko.odaki@daynix.com; helo=mail-oo1-xc30.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @daynix-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1732251834572116600 The specification says hash_report should be set to VIRTIO_NET_HASH_REPORT_NONE if VIRTIO_NET_F_HASH_REPORT is negotiated but not configured with VIRTIO_NET_CTRL_MQ_RSS_CONFIG. However, virtio_net_receive_rcu() instead wrote out the content of the extra_hdr variable, which is not uninitialized in such a case. Fix this by zeroing the extra_hdr. Fixes: e22f0603fb2f ("virtio-net: reference implementation of hash report") Signed-off-by: Akihiko Odaki Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- hw/net/virtio-net.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index b544d2e91a77..44ea72b50e0e 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -1911,6 +1911,8 @@ static ssize_t virtio_net_receive_rcu(NetClientState = *nc, const uint8_t *buf, size_t offset, i, guest_offset, j; ssize_t err; =20 + memset(&extra_hdr, 0, sizeof(extra_hdr)); + if (n->rss_data.enabled && n->rss_data.enabled_software_rss) { int index =3D virtio_net_process_rss(nc, buf, size, &extra_hdr); if (index >=3D 0) { --=20 2.47.0