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Wed, 20 Aug 2025 05:36:07 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.99]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 661C219560B0; Wed, 20 Aug 2025 05:35:58 +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, sj@kernel.org, lorenzo.stoakes@oracle.com, elver@google.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He , loongarch@lists.linux.dev Subject: [PATCH v3 06/12] arch/loongarch: don't initialize kasan if it's disabled Date: Wed, 20 Aug 2025 13:34:53 +0800 Message-ID: <20250820053459.164825-7-bhe@redhat.com> In-Reply-To: <20250820053459.164825-1-bhe@redhat.com> References: <20250820053459.164825-1-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-Queue-Id: C9F934000D X-Rspam-User: X-Stat-Signature: 7rgajpk8bif8o4hrs1j5hmoobqp6mugt X-Rspamd-Server: rspam09 X-HE-Tag: 1755668175-89648 X-HE-Meta: U2FsdGVkX19dVTMdXEp7R7z6ceP4Kb/ZuEv2cTES62co51w0U/DSdBXG1r2x3xSwlMlimuGgzEBulanXknkMyAqjqTBE/HksktxdLrK1QGrMvdrQCadSqAcSXwvTTmignXpL8biavtweGG+Zap9qe3UcWT9TXGK+9X9mHK843NRgprHljLN7JWRt15GXb80+cDjFkHupP/m8QbN71kyy0Pm3PNx0thmYxt8suHn4efRwlQBrzDEiiyemf38SPEDY8NETYDWjQ/e08OClfxxSP0U319Nvssrh2ZdsjFYR2KabN0fJ6n/j7khbBd1EFbFsG5h0kVmT82hS2iC6JOpX/hZS6PRU0dVLKQHyxjcHbzmCjRNIsZqsR+GOnjaLu17L2HVZ3qndxrcPsTjRqaUQJBrZYV24PsRKXUFrAHU/V9JeCiqnWRW3MMmpKDcqAyH80D2HbbHnPDB5WqCt7v3965RRfXUI6yO5xIm6HY8CnzPA5dDyii7+IyHcQwM0UDiMMxPAeDA52iCCmqnf9g+HNr2PtPhiqsLwRkAx3MrZydi798BjYB8e1JXHrnHXBxcCS139yImpDgsrw5d2xgLGPc2FAFFXji8rzn+yx8JpX+Ugh8Yyn49c4ED+8qa+UhABFxODss5I6gDAzvOKHhZ8jid05F159phtiRvK3891xEQIb5udb3NhqtSeu7LPm2snCkl4qwt713nNH5hkPOFv+qBSyKh8XQ4STAyD2CBbgDKeMdd623kiZEof/RwckluS3r+qz+VXgY8pyK35j2sotjlCZlYFO4UnGURf70zzG4QESlnb9sFcyOqm9l2Bmi+ot2S1cvgub2kYS6uBk3jiv9s4F49iP1V3yv6A9Mnlf/r8SuoDCqhzlxxKdK29hnmwe/s15dQFFmmEpH8LSMA1IIdEfTOnfzxCVq7N+Lh6zZva5k5lKtPNa/DNdic4sM2QXrfRgaI0Hmiu4nZBsSc VEVU5fAw QRfzAvgxy7sYWXyp4EWGPIjoDIf/2jXbkkcFijd5YRu0uBwpI0NYSsUvf26LiO83DUbsBsuNCWtKRB9iBCHPeHY3WeEChK0lnPeMUSvutsl1Yu+taagTTpoylEjEWIJ/j5SJ/KpoB+Fs1VeBsxIcvP7A0i9nBNebPWr/ELYifeQQnhrbR8EnIVJl8ZXBPyuh4jpLMO+zhW3qySw4kHCWsYyudgbntyBB34aXibGCqjls8gNuR+8MBnpIElacGXe3Ik12vikK1Yss4IeQGFLkabzHDmFXZiYDAHbhbV2hPlsCOmrgg0wrnS7a5rQUeAZ8mLcPu9miOp//XLt7UbkUStVpM7FA8gtqr1nq1Kkj214kM9Q9VeDeDpgyMZkfrFNzBH46dNu24+oqhzeqQwJLDP3wm5A== 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 Cc: loongarch@lists.linux.dev --- 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