2 files changed, 24 insertions, 17 deletions

diff --git a/contrib/vhost-user-gpu/main.c b/contrib/vhost-user-gpu/main.c
index f9e2146b69..04b753046f 100644
--- a/contrib/vhost-user-gpu/main.c
+++ b/contrib/vhost-user-gpu/main.c
@@ -138,22 +138,20 @@ static int
 vg_sock_fd_write(int sock, const void *buf, ssize_t buflen, int fd)
 {
     ssize_t ret;
-    struct msghdr msg;
-    struct iovec iov;
+    struct iovec iov = {
+        .iov_base = (void *)buf,
+        .iov_len = buflen,
+    };
+    struct msghdr msg = {
+        .msg_iov = &iov,
+        .msg_iovlen = 1,
+    };
     union {
         struct cmsghdr cmsghdr;
         char control[CMSG_SPACE(sizeof(int))];
     } cmsgu;
     struct cmsghdr *cmsg;
 
-    iov.iov_base = (void *)buf;
-    iov.iov_len = buflen;
-
-    msg.msg_name = NULL;
-    msg.msg_namelen = 0;
-    msg.msg_iov = &iov;
-    msg.msg_iovlen = 1;
-
     if (fd != -1) {
         msg.msg_control = cmsgu.control;
         msg.msg_controllen = sizeof(cmsgu.control);
@@ -164,9 +162,6 @@ vg_sock_fd_write(int sock, const void *buf, ssize_t buflen, int fd)
         cmsg->cmsg_type = SCM_RIGHTS;
 
         *((int *)CMSG_DATA(cmsg)) = fd;
-    } else {
-        msg.msg_control = NULL;
-        msg.msg_controllen = 0;
     }
 
     do {
@@ -354,7 +349,7 @@ vg_disable_scanout(VuGpu *g, int scanout_id)
     scanout->width = 0;
     scanout->height = 0;
 
-    {
+    if (g->sock_fd >= 0) {
         VhostUserGpuMsg msg = {
             .request = VHOST_USER_GPU_SCANOUT,
             .size = sizeof(VhostUserGpuScanout),
@@ -1160,13 +1155,17 @@ main(int argc, char *argv[])
 
     if (opt_socket_path) {
         int lsock = unix_listen(opt_socket_path, &error_fatal);
+        if (lsock < 0) {
+            g_printerr("Failed to listen on %s.\n", opt_socket_path);
+            exit(EXIT_FAILURE);
+        }
         fd = accept(lsock, NULL, NULL);
         close(lsock);
     } else {
         fd = opt_fdnum;
     }
     if (fd == -1) {
-        g_printerr("Invalid socket");
+        g_printerr("Invalid vhost-user socket.\n");
         exit(EXIT_FAILURE);
     }
 
diff --git a/contrib/vhost-user-input/main.c b/contrib/vhost-user-input/main.c
index 8d493f598e..8b4e7d2536 100644
--- a/contrib/vhost-user-input/main.c
+++ b/contrib/vhost-user-input/main.c
@@ -342,7 +342,11 @@ main(int argc, char *argv[])
 
     vi.config = g_array_new(false, false, sizeof(virtio_input_config));
     memset(&id, 0, sizeof(id));
-    ioctl(vi.evdevfd, EVIOCGNAME(sizeof(id.u.string) - 1), id.u.string);
+    if (ioctl(vi.evdevfd, EVIOCGNAME(sizeof(id.u.string) - 1),
+              id.u.string) < 0) {
+        g_printerr("Failed to get evdev name: %s\n", g_strerror(errno));
+        exit(EXIT_FAILURE);
+    }
     id.select = VIRTIO_INPUT_CFG_ID_NAME;
     id.size = strlen(id.u.string);
     g_array_append_val(vi.config, id);
@@ -367,13 +371,17 @@ main(int argc, char *argv[])
 
     if (opt_socket_path) {
         int lsock = unix_listen(opt_socket_path, &error_fatal);
+        if (lsock < 0) {
+            g_printerr("Failed to listen on %s.\n", opt_socket_path);
+            exit(EXIT_FAILURE);
+        }
         fd = accept(lsock, NULL, NULL);
         close(lsock);
     } else {
         fd = opt_fdnum;
     }
     if (fd == -1) {
-        g_printerr("Invalid socket");
+        g_printerr("Invalid vhost-user socket.\n");
         exit(EXIT_FAILURE);
     }
     vug_init(&vi.dev, fd, vi_panic, &vuiface);