diff -r 49bb6c8ceb2b -r bdec069d2239 src/server/daemon/vfs.c
--- a/src/server/daemon/vfs.c	Tue Jul 09 20:56:01 2013 +0200
+++ b/src/server/daemon/vfs.c	Thu Jul 11 14:21:23 2013 +0200
@@ -59,6 +59,8 @@
 }
 
 void vfs_add(char *name, VFS *vfs) {
+    WS_ASSERT(name);
+    
     if(!vfs_map) {
         vfs_init();
     }
@@ -66,6 +68,9 @@
 }
 
 VFSContext* vfs_request_context(Session *sn, Request *rq) {
+    WS_ASSERT(sn);
+    WS_ASSERT(rq);
+    
     VFSContext *ctx = pool_malloc(sn->pool, sizeof(VFSContext));
     ctx->sn = sn;
     ctx->rq = rq;
@@ -79,6 +84,8 @@
 }
 
 SYS_FILE vfs_open(VFSContext *ctx, char *path, int oflags) {
+    WS_ASSERT(path);
+    
     Session *sn;
     Request *rq;
     pool_handle_t *pool;
@@ -250,6 +257,8 @@
 }
 
 VFS_DIR vfs_opendir(VFSContext *ctx, char *path) {
+    WS_ASSERT(path);
+    
     Session *sn;
     Request *rq;
     pool_handle_t *pool;