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From: "Marek Behún" <kabel@kernel.org>
To: Simon Glass <sjg@chromium.org>, Tom Rini <trini@konsulko.com>
Cc: "U-Boot Mailing List" <u-boot@lists.denx.de>,
	"Marek Behún" <marek.behun@nic.cz>
Subject: [PATCH v2 05/13] env: Don't match empty variable name in env_match()
Date: Wed, 13 Oct 2021 17:45:49 +0200	[thread overview]
Message-ID: <20211013154557.28479-6-kabel@kernel.org> (raw)
In-Reply-To: <20211013154557.28479-1-kabel@kernel.org>

From: Marek Behún <marek.behun@nic.cz>

Do we really allow zero-length variable name? I guess not.

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

diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index 742e0924af..e2e8a38b5d 100644
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -708,7 +708,7 @@ char *from_env(const char *envvar)
 
 static int env_match(uchar *s1, int i2)
 {
-	if (s1 == NULL)
+	if (s1 == NULL || *s1 == '\0')
 		return -1;
 
 	while (*s1 == env_get_char(i2++))
-- 
2.32.0


  parent reply	other threads:[~2021-10-13 15:46 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-13 15:45 [PATCH v2 00/13] env_get_char() removal and env_get_f() refactor Marek Behún
2021-10-13 15:45 ` [PATCH v2 01/13] env: Fix documentation for env_get_f() Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 02/13] env: Drop env_get_char_spec() and old, unused .get_char() implementations Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 03/13] examples: api: glue: Remove comment that does not apply anymore Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 04/13] env: Change env_match() to static and remove from header Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-14 16:06     ` Marek Behún
2021-10-14 18:24       ` Simon Glass
2021-10-15  0:40         ` Simon Glass
2021-10-13 15:45 ` Marek Behún [this message]
2021-10-14 15:11   ` [PATCH v2 05/13] env: Don't match empty variable name in env_match() Simon Glass
2021-10-13 15:45 ` [PATCH v2 06/13] env: Check for terminating null-byte " Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 07/13] env: Inline env_get_char() into it's only user Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 08/13] env: Early return from env_get_f() on NULL name Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 09/13] env: Use string pointer instead of indexes in env_get_f() Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-15  0:40   ` Simon Glass
2021-10-15 13:20     ` Marek Behún
2021-10-13 15:45 ` [PATCH v2 10/13] env: Use better name for variable " Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-15  0:40   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 11/13] env: Make return value of env_get_f() behave like sprintf() on success Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 12/13] env: Use memcpy() instead of ad-hoc code to copy variable value Marek Behún
2021-10-14 15:11   ` Simon Glass
2021-10-13 15:45 ` [PATCH v2 13/13] env: Move non-cmd specific env functions to env/common.c Marek Behún
2021-10-14 15:11   ` Simon Glass

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