diff --git a/fs/proc/base.c b/fs/proc/base.c
index 76b296fe93c9..dc98620634a3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -752,7 +752,8 @@ static ssize_t environ_read(struct file *file, char __user *buf,
 	int ret = 0;
 	struct mm_struct *mm = file->private_data;
 
-	if (!mm)
+	/* Ensure the process spawned far enough to have an environment. */
+	if (!mm || !mm->env_end)
 		return 0;
 
 	page = (char *)__get_free_page(GFP_TEMPORARY);