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[79.179.71.128]) by smtp.gmail.com with ESMTPSA id a13sm3905305wme.26.2020.09.29.00.21.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Sep 2020 00:21:02 -0700 (PDT) Date: Tue, 29 Sep 2020 03:21:00 -0400 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL v4 04/48] virtio-mem: detach the element from the virtqueue when error occurs Message-ID: <20200929071948.281157-5-mst@redhat.com> References: <20200929071948.281157-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200929071948.281157-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/29 02:22:44 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.687, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Li Qiang , David Hildenbrand Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Li Qiang If error occurs while processing the virtio request we should call 'virtqueue_detach_element' to detach the element from the virtqueue before free the elem. Signed-off-by: Li Qiang Message-Id: <20200816142245.17556-1-liq3ea@163.com> Fixes: 910b25766b ("virtio-mem: Paravirtualized memory hot(un)plug") Acked-by: David Hildenbrand Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/virtio-mem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c index 8fbec77ccc..7c8ca9f28b 100644 --- a/hw/virtio/virtio-mem.c +++ b/hw/virtio/virtio-mem.c @@ -318,6 +318,7 @@ static void virtio_mem_handle_request(VirtIODevice *vdev, VirtQueue *vq) if (iov_to_buf(elem->out_sg, elem->out_num, 0, &req, len) < len) { virtio_error(vdev, "virtio-mem protocol violation: invalid request" " size: %d", len); + virtqueue_detach_element(vq, elem, 0); g_free(elem); return; } @@ -327,6 +328,7 @@ static void virtio_mem_handle_request(VirtIODevice *vdev, VirtQueue *vq) virtio_error(vdev, "virtio-mem protocol violation: not enough space" " for response: %zu", iov_size(elem->in_sg, elem->in_num)); + virtqueue_detach_element(vq, elem, 0); g_free(elem); return; } @@ -348,6 +350,7 @@ static void virtio_mem_handle_request(VirtIODevice *vdev, VirtQueue *vq) default: virtio_error(vdev, "virtio-mem protocol violation: unknown request" " type: %d", type); + virtqueue_detach_element(vq, elem, 0); g_free(elem); return; } -- MST