virtiofsd/fuse_virtio.c: Changed allocations of locals to GLib

Replaced the allocation of local variables from malloc() to
GLib allocation functions.

In one instance, dropped the usage to an assert after a malloc()
call and used g_malloc() instead.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20210420154643.58439-8-ma.mandourr@gmail.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

tools/virtiofsd/fuse_virtio.c

@@ -511,8 +511,7 @@ static void fv_queue_worker(gpointer data, gpointer user_data)
      * They're spread over multiple descriptors in a scatter/gather set
      * and we can't trust the guest to keep them still; so copy in/out.
      */
-    fbuf.mem = malloc(se->bufsize);
-    assert(fbuf.mem);
+    fbuf.mem = g_malloc(se->bufsize);
 
     fuse_mutex_init(&req->ch.lock);
     req->ch.fd = -1;
@@ -564,8 +563,8 @@ static void fv_queue_worker(gpointer data, gpointer user_data)
         memcpy(fbuf.mem, &inh, sizeof(struct fuse_in_header));
 
         /* Allocate the bufv, with space for the rest of the iov */
-        pbufv = malloc(sizeof(struct fuse_bufvec) +
-                       sizeof(struct fuse_buf) * out_num);
+        pbufv = g_try_malloc(sizeof(struct fuse_bufvec) +
+                             sizeof(struct fuse_buf) * out_num);
         if (!pbufv) {
             fuse_log(FUSE_LOG_ERR, "%s: pbufv malloc failed\n",
                     __func__);
@@ -622,7 +621,7 @@ static void fv_queue_worker(gpointer data, gpointer user_data)
 
 out:
     if (allocated_bufv) {
-        free(pbufv);
+        g_free(pbufv);
     }
 
     /* If the request has no reply, still recycle the virtqueue element */
@@ -641,7 +640,7 @@ out:
     }
 
     pthread_mutex_destroy(&req->ch.lock);
-    free(fbuf.mem);
+    g_free(fbuf.mem);
     free(req);
 }