[PATCH v5 07/15] arch/arm64: don't initialize kasan if it's disabled
From: Baoquan He <hidden>
Date: 2026-02-25 08:15:55
Also in:
linux-arm-kernel, linux-mm, linux-riscv, linux-s390, linux-um, lkml, loongarch
Subsystem:
arm64 port (aarch64 architecture), kasan, the rest · Maintainers:
Catalin Marinas, Will Deacon, Andrey Ryabinin, Linus Torvalds
Here, kasan is disabled if specified 'kasan=off' in kernel cmdline. And also need skip kasan_populate_early_vm_area_shadow() if kasan is disabled. Signed-off-by: Baoquan He <redacted> Cc: linux-arm-kernel@lists.infradead.org --- arch/arm64/mm/kasan_init.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c
index abeb81bf6ebd..4a58e609c81b 100644
--- a/arch/arm64/mm/kasan_init.c
+++ b/arch/arm64/mm/kasan_init.c@@ -384,6 +384,9 @@ void __init kasan_populate_early_vm_area_shadow(void *start, unsigned long size) { unsigned long shadow_start, shadow_end; + if (!kasan_enabled()) + return; + if (!is_vmalloc_or_module_addr(start)) return;
@@ -397,6 +400,10 @@ void __init kasan_populate_early_vm_area_shadow(void *start, unsigned long size) void __init kasan_init(void) { + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + kasan_init_shadow(); kasan_init_depth(); kasan_init_generic();
--
2.52.0