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-rw-r--r--src/mman/mmap.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mman/mmap.c b/src/mman/mmap.c
index e99271f7..b56cff86 100644
--- a/src/mman/mmap.c
+++ b/src/mman/mmap.c
@@ -1,6 +1,7 @@
#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
+#include <stdint.h>
#include <limits.h>
#include "syscall.h"
#include "libc.h"
@@ -20,6 +21,10 @@ void *__mmap(void *start, size_t len, int prot, int flags, int fd, off_t off)
errno = EINVAL;
return MAP_FAILED;
}
+ if (len >= PTRDIFF_MAX) {
+ errno = ENOMEM;
+ return MAP_FAILED;
+ }
if (flags & MAP_FIXED) __vm_lock(-1);
#ifdef SYS_mmap2
ret = (void *)syscall(SYS_mmap2, start, len, prot, flags, fd, off>>12);