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Fri, 28 Nov 2025 03:34:17 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.7]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 8142319560B0; Fri, 28 Nov 2025 03:34:10 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, andreyknvl@gmail.com, glider@google.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, elver@google.com, sj@kernel.org, lorenzo.stoakes@oracle.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He , linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 05/12] arch/arm64: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:13 +0800 Message-ID: <20251128033320.1349620-6-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 0E7501C0005 X-Stat-Signature: xg1ppzeeahyxyge5pamwyt8sss8whs8m X-Rspam-User: X-HE-Tag: 1764300866-231601 X-HE-Meta: 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 +Dog2nj9 oawChsBuqDIHQE45jmoqKH3YaP54EskV1sfsej9TtdR8P5APXUgGkM7YP3c71a0f+PA5IykCQ8j6ZqXohEprHiHDkmakAvblB1NHEdIpRw4xQAYL35p7l3Q33kzLnoQaHgWCrj6/bTVuhD1VsbZ/r9Uy3cAM2RB1wH4k9Lka2i978z0NXs4vnSNJH+o6ypSFR3gPfC0iFS5/Rp1SWWgFeFwlnjOQW9imUv0CF32cZPXwZXdz6xakN/630ld4L6mii5J2Sbzs6/nEZjrIRcp5z5wBv1Wveg0zGvzBBi7hIu3fKnPPFEIjGIBMlH0t34TwXNvbYm/Zdh/FPaJvLWIEas5MmGRQaEYanF6B1uyD3O/xgWFFxjDGQwy2Yqf+AUXfvPhJURC4G1rx4G2mq56dWm+K88bzP30K61hWcnU55IAV+PHzBw2JV+KrYQm+ANXZVCqjCBMnJloMu+V4= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: And also need skip kasan_populate_early_vm_area_shadow() if kasan is disabled. Signed-off-by: Baoquan He Cc: linux-arm-kernel@lists.infradead.org --- arch/arm64/mm/kasan_init.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index abeb81bf6ebd..eb49fdad4ef1 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 +400,9 @@ void __init kasan_populate_early_vm_area_shadow(void *start, unsigned long size) void __init kasan_init(void) { + if (kasan_arg_disabled) + return; + kasan_init_shadow(); kasan_init_depth(); kasan_init_generic(); -- 2.41.0