Check for valid stack frame in longjmp.

If longjmp restores the stack frame to an address which is beyond
the stack frame at the time of the longjmp call it would install
an uninitialized stack frame.  If compiled with _FORTIFY_SOURCE
defined, longjmp will now bail out in this situation.

1 files changed, 3 insertions, 0 deletions

diff --git a/debug/Versions b/debug/Versions
index ef6b08b7b3..ff40107b77 100644
--- a/debug/Versions
+++ b/debug/Versions
@@ -46,6 +46,9 @@ libc {
     __asprintf_chk; __vasprintf_chk;  __dprintf_chk; __vdprintf_chk;
     __obstack_printf_chk; __obstack_vprintf_chk;
   }
+  GLIBC_2.11 {
+    __longjmp_chk;
+  }
   GLIBC_PRIVATE {
     __fortify_fail;
   }