LibC: Fill new allocations with random data and fix a bug

The bug was noticed as a result of this new randomization of
allocations.

2 files changed, 3 insertions, 1 deletions

diff --git a/userland/libc/malloc/malloc.c b/userland/libc/malloc/malloc.c
index 4c9621b..79d1d5f 100644
--- a/userland/libc/malloc/malloc.c
+++ b/userland/libc/malloc/malloc.c
@@ -171,6 +171,7 @@ void *int_malloc(size_t s, int align) {
     rc = c;
     return rc;
   }
+  randomfill(rc, s);
   return rc;
 }
 
@@ -221,6 +222,7 @@ void free(void *p) {
   if (h->flags & IS_FREE)
     return;
 
+  randomfill(p, h->size);
   h->flags |= IS_FREE;
   merge_headers(h);
 }
diff --git a/userland/libc/stdio/fopen.c b/userland/libc/stdio/fopen.c
index d31082d..71d14db 100644
--- a/userland/libc/stdio/fopen.c
+++ b/userland/libc/stdio/fopen.c
@@ -44,7 +44,7 @@ FILE *fopen(const char *pathname, const char *mode) {
   struct stat s;
   stat(pathname, &s);
 
-  FILE *r = malloc(sizeof(FILE));
+  FILE *r = calloc(1, sizeof(FILE));
   r->read = read_fd;
   r->write = write_fd;
   r->seek = seek_fd;