This patch provides a workaround of data race inside _IO_new_proc_open()

(upstream BZ#22834)

Signed-off-by: Su Lifan <su-lifan@linux.alibaba.com>

diff -aurN glibc-2.28.orig/libio/iopopen.c glibc-2.28/libio/iopopen.c
--- glibc-2.28.orig/libio/iopopen.c	2018-08-01 05:10:47.000000000 +0000
+++ glibc-2.28/libio/iopopen.c	2022-04-08 11:33:15.487864923 +0000
@@ -35,6 +35,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <kernel-features.h>
+#include <atomic.h>
 
 struct _IO_proc_file
 {
@@ -168,6 +169,7 @@
   _IO_lock_lock (proc_file_chain_lock);
 #endif
   ((_IO_proc_file *) fp)->next = proc_file_chain;
+  atomic_write_barrier();
   proc_file_chain = (_IO_proc_file *) fp;
 #ifdef _IO_MTSAFE_IO
   _IO_lock_unlock (proc_file_chain_lock);