From 6ba4473fb757e7606a4224d87774294c9d60d2cd Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Beh=C3=BAn?= <marek.behun@nic.cz>
Date: Sun, 17 Oct 2021 17:36:33 +0200
Subject: [PATCH] env: Don't match empty variable name in env_match()
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Do we really allow zero-length variable name? I guess not.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 cmd/nvedit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index 5b1d4c2..8d53579 100644
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -708,7 +708,7 @@ char *from_env(const char *envvar)
 
 static const char *env_match(const char *p, const char *s1)
 {
-	if (s1 == NULL)
+	if (s1 == NULL || *s1 == '\0')
 		return NULL;
 
 	while (*s1 == *p++)
-- 
2.7.4