D59822.diff
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	diff --git a/sys/fs/cuse/cuse.c b/sys/fs/cuse/cuse.c
	--- a/sys/fs/cuse/cuse.c
	+++ b/sys/fs/cuse/cuse.c
	@@ -1666,6 +1666,16 @@
	cuse_cmd_lock(pccmd);

	while (uio->uio_resid != 0) {
	+ /*
	+ * The uiomove() below does not step past an iovec it has
	+ * just emptied, so do it here, to avoid an infinite loop
	+ * where we are requesting zero-byte transfers.
	+ */
	+ if (uio->uio_iov->iov_len == 0) {
	+ uio->uio_iov++;
	+ uio->uio_iovcnt--;
	+ continue;
	+ }
	if (uio->uio_iov->iov_len > CUSE_LENGTH_MAX) {
	error = ENOMEM;
	break;
	@@ -1754,6 +1764,16 @@
	cuse_cmd_lock(pccmd);

	while (uio->uio_resid != 0) {
	+ /*
	+ * The uiomove() below does not step past an iovec it has
	+ * just emptied, so do it here, to avoid an infinite loop
	+ * where we are requesting zero-byte transfers.
	+ */
	+ if (uio->uio_iov->iov_len == 0) {
	+ uio->uio_iov++;
	+ uio->uio_iovcnt--;
	+ continue;
	+ }
	if (uio->uio_iov->iov_len > CUSE_LENGTH_MAX) {
	error = ENOMEM;
	break;