diff --git a/block/bochs.c b/block/bochs.c
index 6674b27438..199ac2b9af 100644
--- a/block/bochs.c
+++ b/block/bochs.c
@@ -131,7 +131,7 @@ static int bochs_open(BlockDriverState *bs, QDict *options, int flags,
         return -EFBIG;
     }
 
-    s->catalog_bitmap = g_try_malloc(s->catalog_size * 4);
+    s->catalog_bitmap = g_try_new(uint32_t, s->catalog_size);
     if (s->catalog_size && s->catalog_bitmap == NULL) {
         error_setg(errp, "Could not allocate memory for catalog");
         return -ENOMEM;
diff --git a/block/parallels.c b/block/parallels.c
index 1774ab8e8e..2a814f3db4 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -121,7 +121,7 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
         ret = -EFBIG;
         goto fail;
     }
-    s->catalog_bitmap = g_try_malloc(s->catalog_size * 4);
+    s->catalog_bitmap = g_try_new(uint32_t, s->catalog_size);
     if (s->catalog_size && s->catalog_bitmap == NULL) {
         ret = -ENOMEM;
         goto fail;
diff --git a/block/qcow2-cache.c b/block/qcow2-cache.c
index 5353b44828..fe0615a995 100644
--- a/block/qcow2-cache.c
+++ b/block/qcow2-cache.c
@@ -50,7 +50,7 @@ Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
 
     c = g_malloc0(sizeof(*c));
     c->size = num_tables;
-    c->entries = g_malloc0(sizeof(*c->entries) * num_tables);
+    c->entries = g_new0(Qcow2CachedTable, num_tables);
 
     for (i = 0; i < c->size; i++) {
         c->entries[i].table = qemu_try_blockalign(bs->file, s->cluster_size);
diff --git a/block/qed-check.c b/block/qed-check.c
index 40a882cc93..36ecd290d6 100644
--- a/block/qed-check.c
+++ b/block/qed-check.c
@@ -227,8 +227,7 @@ int qed_check(BDRVQEDState *s, BdrvCheckResult *result, bool fix)
     };
     int ret;
 
-    check.used_clusters = g_try_malloc0(((check.nclusters + 31) / 32) *
-                                        sizeof(check.used_clusters[0]));
+    check.used_clusters = g_try_new0(uint32_t, (check.nclusters + 31) / 32);
     if (check.nclusters && check.used_clusters == NULL) {
         return -ENOMEM;
     }
diff --git a/block/rbd.c b/block/rbd.c
index 3aaf8559dd..ea969e7beb 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -862,7 +862,7 @@ static int qemu_rbd_snap_list(BlockDriverState *bs,
     int max_snaps = RBD_MAX_SNAPS;
 
     do {
-        snaps = g_malloc(sizeof(*snaps) * max_snaps);
+        snaps = g_new(rbd_snap_info_t, max_snaps);
         snap_count = rbd_snap_list(s->image, snaps, &max_snaps);
         if (snap_count <= 0) {
             g_free(snaps);
diff --git a/block/sheepdog.c b/block/sheepdog.c
index ba1ef43502..12cbd9dcb4 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -2357,7 +2357,7 @@ static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
         goto out;
     }
 
-    sn_tab = g_malloc0(nr * sizeof(*sn_tab));
+    sn_tab = g_new0(QEMUSnapshotInfo, nr);
 
     /* calculate a vdi id with hash function */
     hval = fnv_64a_buf(s->name, strlen(s->name), FNV1A_64_INIT);
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 6d9a0651d8..04459e583c 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -319,7 +319,7 @@ static void nvme_init_sq(NvmeSQueue *sq, NvmeCtrl *n, uint64_t dma_addr,
     sq->size = size;
     sq->cqid = cqid;
     sq->head = sq->tail = 0;
-    sq->io_req = g_malloc(sq->size * sizeof(*sq->io_req));
+    sq->io_req = g_new(NvmeRequest, sq->size);
 
     QTAILQ_INIT(&sq->req_list);
     QTAILQ_INIT(&sq->out_req_list);
@@ -773,9 +773,9 @@ static int nvme_init(PCIDevice *pci_dev)
     n->reg_size = 1 << qemu_fls(0x1004 + 2 * (n->num_queues + 1) * 4);
     n->ns_size = bs_size / (uint64_t)n->num_namespaces;
 
-    n->namespaces = g_malloc0(sizeof(*n->namespaces)*n->num_namespaces);
-    n->sq = g_malloc0(sizeof(*n->sq)*n->num_queues);
-    n->cq = g_malloc0(sizeof(*n->cq)*n->num_queues);
+    n->namespaces = g_new0(NvmeNamespace, n->num_namespaces);
+    n->sq = g_new0(NvmeSQueue *, n->num_queues);
+    n->cq = g_new0(NvmeCQueue *, n->num_queues);
 
     memory_region_init_io(&n->iomem, OBJECT(n), &nvme_mmio_ops, n,
                           "nvme", n->reg_size);
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c
index 3a1e11e1ea..afd8867591 100644
--- a/qemu-io-cmds.c
+++ b/qemu-io-cmds.c
@@ -29,7 +29,7 @@ static int compare_cmdname(const void *a, const void *b)
 
 void qemuio_add_command(const cmdinfo_t *ci)
 {
-    cmdtab = g_realloc(cmdtab, ++ncmds * sizeof(*cmdtab));
+    cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds);
     cmdtab[ncmds - 1] = *ci;
     qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
 }
@@ -122,7 +122,7 @@ static char **breakline(char *input, int *count)
             continue;
         }
         c++;
-        tmp = g_realloc(rval, sizeof(*rval) * (c + 1));
+        tmp = g_renew(char *, rval, (c + 1));
         if (!tmp) {
             g_free(rval);
             rval = NULL;
@@ -1264,9 +1264,9 @@ static int multiwrite_f(BlockDriverState *bs, int argc, char **argv)
         }
     }
 
-    reqs = g_malloc0(nr_reqs * sizeof(*reqs));
-    buf = g_malloc0(nr_reqs * sizeof(*buf));
-    qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
+    reqs = g_new0(BlockRequest, nr_reqs);
+    buf = g_new0(char *, nr_reqs);
+    qiovs = g_new(QEMUIOVector, nr_reqs);
 
     for (i = 0; i < nr_reqs && optind < argc; i++) {
         int j;