diff --git a/sys/cam/ctl/ctl_backend_ramdisk.c b/sys/cam/ctl/ctl_backend_ramdisk.c
--- a/sys/cam/ctl/ctl_backend_ramdisk.c
+++ b/sys/cam/ctl/ctl_backend_ramdisk.c
@@ -386,6 +386,7 @@
 		if (res < cbe_lun->blocksize)
 			break;
 	}
+	free(io->scsiio.kern_data_ptr, M_RAMDISK);
 	if (lbas > 0) {
 		off += io->scsiio.kern_rel_offset - io->scsiio.kern_data_len;
 		scsi_u64to8b(off, info);