From 05fe3ecffff485032e904f0a3ea709e24d9188eb Mon Sep 17 00:00:00 2001
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Fri, 14 Apr 2023 08:22:40 -0300
Subject: [PATCH] malloc: Assure that THP mode read do write OOB end of stringt

---
 sysdeps/unix/sysv/linux/malloc-hugepages.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/malloc-hugepages.c b/sysdeps/unix/sysv/linux/malloc-hugepages.c
index 740027ebfb..2f316474c1 100644
--- a/sysdeps/unix/sysv/linux/malloc-hugepages.c
+++ b/sysdeps/unix/sysv/linux/malloc-hugepages.c
@@ -61,6 +61,8 @@ __malloc_thp_mode (void)
 
   char str[sizeof(mode_always)];
   ssize_t s = __read_nocancel (fd, str, sizeof (str));
+  if (s >= sizeof str || s < 0)
+    return malloc_thp_mode_not_supported;
   str[s] = '\0';
   __close_nocancel (fd);
 
-- 
2.11.4.GIT