1 files changed, 18 insertions, 8 deletions

diff --git a/arch/arm64/kernel/kaslr.c b/arch/arm64/kernel/kaslr.c
index b181e0544b79..0921aa1520b0 100644
--- a/arch/arm64/kernel/kaslr.c
+++ b/arch/arm64/kernel/kaslr.c
@@ -50,10 +50,16 @@ static __init u64 get_kaslr_seed(void *fdt)
 	return ret;
 }
 
-static __init const u8 *kaslr_get_cmdline(void *fdt)
+static __init bool cmdline_contains_nokaslr(const u8 *cmdline)
 {
-	static __initconst const u8 default_cmdline[] = CONFIG_CMDLINE;
+	const u8 *str;
 
+	str = strstr(cmdline, "nokaslr");
+	return str == cmdline || (str > cmdline && *(str - 1) == ' ');
+}
+
+static __init bool is_kaslr_disabled_cmdline(void *fdt)
+{
 	if (!IS_ENABLED(CONFIG_CMDLINE_FORCE)) {
 		int node;
 		const u8 *prop;
@@ -65,10 +71,17 @@ static __init const u8 *kaslr_get_cmdline(void *fdt)
 		prop = fdt_getprop(fdt, node, "bootargs", NULL);
 		if (!prop)
 			goto out;
-		return prop;
+
+		if (cmdline_contains_nokaslr(prop))
+			return true;
+
+		if (IS_ENABLED(CONFIG_CMDLINE_EXTEND))
+			goto out;
+
+		return false;
 	}
 out:
-	return default_cmdline;
+	return cmdline_contains_nokaslr(CONFIG_CMDLINE);
 }
 
 /*
@@ -83,7 +96,6 @@ u64 __init kaslr_early_init(u64 dt_phys)
 {
 	void *fdt;
 	u64 seed, offset, mask, module_range;
-	const u8 *cmdline, *str;
 	unsigned long raw;
 	int size;
 
@@ -115,9 +127,7 @@ u64 __init kaslr_early_init(u64 dt_phys)
 	 * Check if 'nokaslr' appears on the command line, and
 	 * return 0 if that is the case.
 	 */
-	cmdline = kaslr_get_cmdline(fdt);
-	str = strstr(cmdline, "nokaslr");
-	if (str == cmdline || (str > cmdline && *(str - 1) == ' ')) {
+	if (is_kaslr_disabled_cmdline(fdt)) {
 		kaslr_status = KASLR_DISABLED_CMDLINE;
 		return 0;
 	}