1 files changed, 7 insertions, 2 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 0e3d4dd516..b8baaa2706 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -2905,6 +2905,8 @@ typedef struct tcache_perthread_struct
   tcache_entry *entries[TCACHE_MAX_BINS];
 } tcache_perthread_struct;
 
+#define MAX_TCACHE_COUNT 127	/* Maximum value of counts[] entries.  */
+
 static __thread bool tcache_shutting_down = false;
 static __thread tcache_perthread_struct *tcache = NULL;
 
@@ -5098,8 +5100,11 @@ do_set_tcache_max (size_t value)
 static __always_inline int
 do_set_tcache_count (size_t value)
 {
-  LIBC_PROBE (memory_tunable_tcache_count, 2, value, mp_.tcache_count);
-  mp_.tcache_count = value;
+  if (value <= MAX_TCACHE_COUNT)
+    {
+      LIBC_PROBE (memory_tunable_tcache_count, 2, value, mp_.tcache_count);
+      mp_.tcache_count = value;
+    }
   return 1;
 }