commit 6b6e3eeba9f96b5d908a9b46b7bb25e76109a0c7
author Marek Behún <marek.behun@nic.cz> Sun Oct 17 17:36:34 2021 +0200
committer Simon Glass <sjg@chromium.org> Thu Oct 21 12:50:48 2021 -0600
tree c4a188ba145a74ceadb21148557972db113eae89
parent 6ba4473fb757e7606a4224d87774294c9d60d2cd

env: Early return from env_get_f() on NULL name

Test non-NULL name immediately, not in env_match().

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>

cmd/nvedit.c

diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index 8d53579..063cc76 100644
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -708,9 +708,6 @@
 
 static const char *env_match(const char *p, const char *s1)
 {
-	if (s1 == NULL || *s1 == '\0')
-		return NULL;
-
 	while (*s1 == *p++)
 		if (*s1++ == '=')
 			return p;
@@ -728,6 +725,9 @@
 {
 	const char *env, *p, *end;
 
+	if (name == NULL || *name == '\0')
+		return -1;
+
 	if (gd->env_valid == ENV_INVALID)
 		env = (const char *)default_environment;
 	else