diff --git a/core/elf.c b/core/elf.c
index 7837143..8f4ccc1 100644
--- a/core/elf.c
+++ b/core/elf.c
@@ -5,6 +5,7 @@
 #include "paging.h"
 #include "thread.h"
 #include "types.h"
+#include "zero.h"
 
 /**
  * Make sure the program is in a valid ELF format, map it into memory,
@@ -17,6 +18,7 @@ uaddr_t loadElfProg(const char *prog, struct process *proc)
 {
     int i;
     uaddr_t lastUserAddr = 0;
+    struct uAddrSpace *as = processGetAddrSpace(proc);
 
 /* e_ident value */
 #define ELFMAG0 0x7f
@@ -136,6 +138,11 @@ uaddr_t loadElfProg(const char *prog, struct process *proc)
             unrefPhyPage(ppage);
         }
 
+        // Hack: Even if already allocated mark the adresse space as managed by a ressource
+        // So this address space is not used by another ressource.
+        uaddr = elf_phdrs[i].p_vaddr;
+        zeroMmap(as, &uaddr, elf_phdrs[i].p_memsz, PAGING_MEM_USER | PAGING_MEM_WRITE | PAGING_MEM_READ, 0);
+
         /* Copy segment into memory */
         memcpy((void *)elf_phdrs[i].p_vaddr, (void *)(prog + elf_phdrs[i].p_offset),
                elf_phdrs[i].p_filesz);
diff --git a/drivers/zero.c b/drivers/zero.c
index 60235a6..9799517 100644
--- a/drivers/zero.c
+++ b/drivers/zero.c
@@ -57,6 +57,7 @@ int zeroOnMapped(struct uAddrVirtualReg *vreg)
 int zeroMmap(struct uAddrSpace *as, uaddr_t *uaddr, size_t size, uint32_t rights,
              uint32_t flags)
 {
+    int ret = 0;
     struct mappedRessource *res =
         (struct mappedRessource *)zalloc(sizeof(struct mappedRessource));
     struct zeroMappedEntry *cust =
@@ -67,5 +68,12 @@ int zeroMmap(struct uAddrSpace *as, uaddr_t *uaddr, size_t size, uint32_t rights
     res->customData   = cust;
     res->onResMapped = zeroOnMapped;
 
-    return uAddrSpaceMmap(as, uaddr, size, rights, flags, res, 0);
+    ret = uAddrSpaceMmap(as, uaddr, size, rights, flags, res, 0);
+
+    if (ret) {
+        free(res);
+        free(cust);
+    }
+
+    return ret;
 }