malloc: Assure that THP mode is always null terminated

diff --git a/sysdeps/unix/sysv/linux/malloc-hugepages.c b/sysdeps/unix/sysv/linux/malloc-hugepages.c
index 683d68c3275fdff7b36ad0288f16acb6d19786e4..740027ebfb0539ba24e6e686af63fec67f39a85f 100644 (file)
--- a/sysdeps/unix/sysv/linux/malloc-hugepages.c
+++ b/sysdeps/unix/sysv/linux/malloc-hugepages.c
@@ -61,6 +61,7 @@ __malloc_thp_mode (void)
 
   char str[sizeof(mode_always)];
   ssize_t s = __read_nocancel (fd, str, sizeof (str));
+  str[s] = '\0';
   __close_nocancel (fd);
 
   if (s == sizeof (mode_always) - 1)