diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 18851601cbba4766657866922a89044855c03aa5..ed2ddebd2bc124b86a62e83ec12c0b55c1c56bd2 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -16,6 +16,7 @@
 #include "qemu/iov.h"
 #include "qemu/module.h"
 #include "qemu/error-report.h"
+#include "qemu/main-loop.h"
 #include "trace.h"
 #include "hw/block/block.h"
 #include "hw/qdev-properties.h"
@@ -1086,11 +1087,24 @@ static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f,
     return 0;
 }
 
+static void virtio_resize_cb(void *opaque)
+{
+    VirtIODevice *vdev = opaque;
+
+    assert(qemu_get_current_aio_context() == qemu_get_aio_context());
+    virtio_notify_config(vdev);
+}
+
 static void virtio_blk_resize(void *opaque)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
 
-    virtio_notify_config(vdev);
+    /*
+     * virtio_notify_config() needs to acquire the global mutex,
+     * so it can't be called from an iothread. Instead, schedule
+     * it to be run in the main context BH.
+     */
+    aio_bh_schedule_oneshot(qemu_get_aio_context(), virtio_resize_cb, vdev);
 }
 
 static const BlockDevOps virtio_block_ops = {