From a754f93ff83fe0ce03a0ebce6c0b1485cf11dffc Mon Sep 17 00:00:00 2001
From: Richard Hughes <richard@hughsie.com>
Date: Wed, 22 Feb 2023 21:14:22 +0000
Subject: [PATCH] Fix a critical warning when parsing an empty kernel cmdline

Fix the bounds check so we never pass a bufsz of zero to fu_strsplit().

Resolves: https://github.com/fwupd/fwupd/issues/5575
---
 libfwupdplugin/fu-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libfwupdplugin/fu-common.c b/libfwupdplugin/fu-common.c
index ee47dd04d..51c94c2b5 100644
--- a/libfwupdplugin/fu-common.c
+++ b/libfwupdplugin/fu-common.c
@@ -116,7 +116,7 @@ fu_common_is_live_media(void)
 		return TRUE;
 	if (!g_file_get_contents("/proc/cmdline", &buf, &bufsz, NULL))
 		return FALSE;
-	if (bufsz == 0)
+	if (bufsz <= 1)
 		return FALSE;
 	tokens = fu_strsplit(buf, bufsz - 1, " ", -1);
 	for (guint i = 0; args[i] != NULL; i++) {