[PATCH v5 11/15] arch/x86: don't initialize kasan if it's disabled

Baoquan He
2026-02-25T08:16:43Z

Here, kasan is disabled if specified 'kasan=off' in kernel cmdline.

Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: x86@kernel.org
---
arch/x86/mm/kasan_init_64.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index 998b6010d6d3..5ebf2850c77d 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -343,6 +343,10 @@ void __init kasan_init(void)
unsigned long shadow_cea_begin, shadow_cea_per_cpu_begin, shadow_cea_end;
int i;

+ /* If KASAN is disabled via command line, don't initialize it. */
+ if (kasan_arg_disabled)
+ return;
+
memcpy(early_top_pgt, init_top_pgt, sizeof(early_top_pgt));

/*
--
2.52.0