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Tue, 12 Aug 2025 12:50:37 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.156]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id C2C97300145B; Tue, 12 Aug 2025 12:50:30 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.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, sj@kernel.org, lorenzo.stoakes@oracle.com, elver@google.com, snovitoll@gmail.com, Baoquan He Subject: [PATCH v2 06/12] arch/loongarch: don't initialize kasan if it's disabled Date: Tue, 12 Aug 2025 20:49:35 +0800 Message-ID: <20250812124941.69508-7-bhe@redhat.com> In-Reply-To: <20250812124941.69508-1-bhe@redhat.com> References: <20250812124941.69508-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 2122D4000D X-Stat-Signature: ktp37w8yrmarn613b73hzw77uddqekb1 X-Rspam-User: X-HE-Tag: 1755003043-705402 X-HE-Meta: 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 PJ0JVK+2 WigcxtdRE6qWX2f4OwsfLqRCE5SspncS/7pL8MmZXRHnJpVrTYjvf+HqsgMZ/aax53YxTtlzDihOnuOrB/HqiplyNYrfw/BJ8lrBNwwHBIzfWwJW3xhB+VuguFpaVMyLmQayGfSEMNrnucqHzVRSZ2/5A8f2msOuENkRBZpAwBcS6WclA39kvPXMCw6XJszAQAfguVPT9R81Jnj8Y0KBKrQAri5FXpJth9+fNJFeuftZdyWszwmnwbQ4NFdiphFGSUx8Zcb35tHElljn3ApKPNlxRg500RXMSGi6GsRgQmY6Ptm1kxPmnlVBJo03FpnJ8hIsZsA2BJj6KDe3DfBQToX+llvrFzIhti6AfRqamPwJHE1paK02MLveV+T+otVL1UtYoWguj636CdOYV88lxU/gFwA== 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 add code to enable kasan_flag_enabled, this is for later usage. Signed-off-by: Baoquan He --- arch/loongarch/mm/kasan_init.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c index d2681272d8f0..0c32eee6910f 100644 --- a/arch/loongarch/mm/kasan_init.c +++ b/arch/loongarch/mm/kasan_init.c @@ -267,6 +267,8 @@ void __init kasan_init(void) u64 i; phys_addr_t pa_start, pa_end; + if (kasan_arg_disabled) + return; /* * If PGDIR_SIZE is too large for cpu_vabits, KASAN_SHADOW_END will * overflow UINTPTR_MAX and then looks like a user space address. @@ -327,6 +329,9 @@ void __init kasan_init(void) csr_write64(__pa_symbol(swapper_pg_dir), LOONGARCH_CSR_PGDH); local_flush_tlb_all(); + /* KASAN is now initialized, enable it. */ + static_branch_enable(&kasan_flag_enabled); + /* At this point kasan is fully initialized. Enable error messages */ init_task.kasan_depth = 0; pr_info("KernelAddressSanitizer initialized.\n"); -- 2.41.0