[PATCH-for-5.2 v2] tools/virtiofsd: Check vu_init() return value (CID 1435958)

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Since commit 6f5fd837889, vu_init() can fail if malloc() returns NULL.

This fixes the following Coverity warning:

  CID 1435958 (#1 of 1): Unchecked return value (CHECKED_RETURN)

Fixes: 6f5fd837889 ("libvhost-user: support many virtqueues")
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
v2: Add fuse_log()
---
 tools/virtiofsd/fuse_virtio.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/virtiofsd/fuse_virtio.c b/tools/virtiofsd/fuse_virtio.c
index 324936948d3..83ba07c6cd8 100644
--- a/tools/virtiofsd/fuse_virtio.c
+++ b/tools/virtiofsd/fuse_virtio.c
@@ -1013,8 +1013,11 @@ int virtio_session_mount(struct fuse_session *se)
     se->vu_socketfd = data_sock;
     se->virtio_dev->se = se;
     pthread_rwlock_init(&se->virtio_dev->vu_dispatch_rwlock, NULL);
-    vu_init(&se->virtio_dev->dev, 2, se->vu_socketfd, fv_panic, NULL,
-            fv_set_watch, fv_remove_watch, &fv_iface);
+    if (!vu_init(&se->virtio_dev->dev, 2, se->vu_socketfd, fv_panic, NULL,
+                 fv_set_watch, fv_remove_watch, &fv_iface)) {
+        fuse_log(FUSE_LOG_ERR, "%s: vu_init failed\n", __func__);
+        return -1;
+    }
 
     return 0;
 }
-- 
2.26.2