diff --git a/fs/proc/base.c b/fs/proc/base.c
index e94b58b496f1..9af49a3984f1 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -850,6 +850,10 @@ static ssize_t mem_write(struct file * file, const char __user *buf,
 	if (check_mem_permission(task))
 		goto out;
 
+	copied = -EIO;
+	if (file->private_data != (void *)((long)current->self_exec_id))
+		goto out;
+
 	copied = -ENOMEM;
 	page = (char *)__get_free_page(GFP_TEMPORARY);
 	if (!page)