1 files changed, 6 insertions, 0 deletions
diff --git a/string/test-memchr.c b/string/test-memchr.c
index 2403c9242b..669e092e7d 100644
--- a/string/test-memchr.c
+++ b/string/test-memchr.c
@@ -210,6 +210,12 @@ test_main (void)
       do_test (0, i, i + 1, i + 1, 0);
     }
 
+  /* BZ#21182 - wrong overflow calculation for i686 implementation
+     with address near end of the page.  */
+  for (i = 2; i < 16; ++i)
+    /* page_size is in fact getpagesize() * 2.  */
+    do_test (page_size / 2 - i, i, i, 1, 0x9B);
+
   do_random_tests ();
   return ret;
 }