--- chunk.c	2017-08-28 01:47:57.000000000 +0200
+++ chunk_new.c	2017-08-28 01:47:48.000000000 +0200
@@ -275,6 +275,23 @@
 	return 0;
 }
 
+
+
+#ifdef __linux__
+#include <linux/version.h>
+#endif
+#include <stdlib.h> /* to get retrieved the POSIX_SOURCE defines  */
+
+int os_fallocate(int fd, off_t filesize) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23)
+        return fallocate(fd, 0, 0, filesize);
+#elif _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
+        return posix_fallocate(fd, 0, filesize);
+#else
+	/* fprintf(stderr, "unsupported platform, old upload bug can still occur\n"); */
+#endif
+}
+
 chunk *chunkqueue_get_append_tempfile(chunkqueue *cq) {
 	chunk *c;
 	buffer *template = buffer_init_string("/var/tmp/lighttpd-upload-XXXXXX");
@@ -298,8 +315,19 @@
 
 			if (-1 != (c->file.fd = mkstemp(template->ptr))) {
 				/* only trigger the unlink if we created the temp-file successfully */
-				c->file.is_temp = 1;
-				break;
+				/* ensure that there is enough storage for our data */
+				const int MAX_CHUNK_SIZE = 1 * 1024 * 1024; 
+				if (os_fallocate(c->file.fd, MAX_CHUNK_SIZE + 1) ) {
+				/*	fprintf(stderr, "not enough space on storage: %d\n", i); */
+					close(c->file.fd);
+					c->file.fd = -1;
+					unlink(template->ptr);
+				}
+				else {
+					lseek(c->file.fd, 0, SEEK_SET);
+					c->file.is_temp = 1;
+					break;
+				} 
 			}
 		}
 	} else {