From patchwork Wed Oct 16 12:24:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13838336 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 12BCED1AD54 for ; Wed, 16 Oct 2024 12:28:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vG5R5wJP2+HeIeZSl5dPouVtElsSsSpNFXprr2GbEao=; b=0sqGyjIcMAaPYk XKPNarrFmV5RK5C0l+swlzLxPFh/uR6UNzHcWQWoVBkPRT+QK6c6qQ7OAuDDDNq5U62IeRTIZ4OYa Y5a3AUTVJgE3y2rcNxjHkR1J3LvMtJXR6ApeT4CisqAPWeOsAcONTdxlaxPQmLQAtOAqRXNRvRxXj 8UXYSCLCY1yYGV99O8b/TBrEZnE0Ic8aGfnslO/5x/j7ZtJqBJxOOJHYM1GvWd5cWhqEefyZDPRKE CfaPwSMwcFqhbTD4jKCo+lEKU736Ocm4RFlUahP0WiRVtfQnsYPsK6KH3emNI02tHV8WXb4NO06Sd Zzn7VrqPOG2uNc6njIyw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t138i-0000000Bk9f-3KZS; Wed, 16 Oct 2024 12:28:32 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t137J-0000000BjhU-3EvH; Wed, 16 Oct 2024 12:27:07 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id B8A1F5C4ADF; Wed, 16 Oct 2024 12:27:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4677BC4CECF; Wed, 16 Oct 2024 12:26:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729081624; bh=eY6kLN8OlN+AhPSjfqE9l5XEI+8YBmb961qfGDylvwo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ewgSS7JQnctq7Hgrv3uuVnVef5NJ6/W1nB36pkS9n4SMtyIyVrElKtKyFF1q0jkpP EsFcTPX0SKB8iugJZ8fG/3GbaKQ9JTTxiSf0x8Je0VGHSki/f8KCPFSVhlw3IAbCgq dHZxxLb3XDQt5YWY63oWKwfSJfIRrZ4ETnxR7W4suuZEwzrS9kg5Y5qEjXIsmjEAIc d+qNLfS/dkDTekE3774d/xn4huY0MjrfXRLRM5fT0pICnGA4BMmSBqBpOwDvhxDH7h lEAtUAvDJvuqN4dGETbbq15U4XHTm20JcFbizm6eRWYoC4wDxNk9mafVHZRkNrpKww GhffryNbJ3RBQ== From: Mike Rapoport To: Andrew Morton , Luis Chamberlain Cc: Andreas Larsson , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Brian Cain , Catalin Marinas , Christoph Hellwig , Christophe Leroy , Dave Hansen , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , Helge Deller , Huacai Chen , Ingo Molnar , Johannes Berg , John Paul Adrian Glaubitz , Kent Overstreet , "Liam R. Howlett" , Mark Rutland , Masami Hiramatsu , Matt Turner , Max Filippov , Michael Ellerman , Michal Simek , Mike Rapoport , Oleg Nesterov , Palmer Dabbelt , Peter Zijlstra , Richard Weinberger , Russell King , Song Liu , Stafford Horne , Steven Rostedt , Suren Baghdasaryan , Thomas Bogendoerfer , Thomas Gleixner , Uladzislau Rezki , Vineet Gupta , Will Deacon , bpf@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-trace-kernel@vger.kernel.org, linux-um@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v6 8/8] x86/module: enable ROX caches for module text on 64 bit Date: Wed, 16 Oct 2024 15:24:24 +0300 Message-ID: <20241016122424.1655560-9-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241016122424.1655560-1-rppt@kernel.org> References: <20241016122424.1655560-1-rppt@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241016_052705_931619_16CC8CB4 X-CRM114-Status: GOOD ( 14.81 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: "Mike Rapoport (Microsoft)" Enable execmem's cache of PMD_SIZE'ed pages mapped as ROX for module text allocations on 64 bit. Signed-off-by: Mike Rapoport (Microsoft) --- arch/x86/Kconfig | 1 + arch/x86/mm/init.c | 37 ++++++++++++++++++++++++++++++++++++- 2 files changed, 37 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2852fcd82cbd..ff71d18253ba 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -83,6 +83,7 @@ config X86 select ARCH_HAS_DMA_OPS if GART_IOMMU || XEN select ARCH_HAS_EARLY_DEBUG if KGDB select ARCH_HAS_ELF_RANDOMIZE + select ARCH_HAS_EXECMEM_ROX if X86_64 select ARCH_HAS_FAST_MULTIPLIER select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index eb503f53c319..c2e4f389f47f 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -1053,18 +1053,53 @@ unsigned long arch_max_swapfile_size(void) #ifdef CONFIG_EXECMEM static struct execmem_info execmem_info __ro_after_init; +#ifdef CONFIG_ARCH_HAS_EXECMEM_ROX +void execmem_fill_trapping_insns(void *ptr, size_t size, bool writeable) +{ + /* fill memory with INT3 instructions */ + if (writeable) + memset(ptr, INT3_INSN_OPCODE, size); + else + text_poke_set(ptr, INT3_INSN_OPCODE, size); +} +#endif + struct execmem_info __init *execmem_arch_setup(void) { unsigned long start, offset = 0; + enum execmem_range_flags flags; + pgprot_t pgprot; if (kaslr_enabled()) offset = get_random_u32_inclusive(1, 1024) * PAGE_SIZE; start = MODULES_VADDR + offset; + if (IS_ENABLED(CONFIG_ARCH_HAS_EXECMEM_ROX)) { + pgprot = PAGE_KERNEL_ROX; + flags = EXECMEM_KASAN_SHADOW | EXECMEM_ROX_CACHE; + } else { + pgprot = PAGE_KERNEL; + flags = EXECMEM_KASAN_SHADOW; + } + execmem_info = (struct execmem_info){ .ranges = { - [EXECMEM_DEFAULT] = { + [EXECMEM_MODULE_TEXT] = { + .flags = flags, + .start = start, + .end = MODULES_END, + .pgprot = pgprot, + .alignment = MODULE_ALIGN, + }, + [EXECMEM_KPROBES ... EXECMEM_BPF] = { + .flags = EXECMEM_KASAN_SHADOW, + .start = start, + .end = MODULES_END, + .pgprot = PAGE_KERNEL, + .alignment = MODULE_ALIGN, + }, + [EXECMEM_MODULE_DATA] = { .flags = EXECMEM_KASAN_SHADOW, .start = start, .end = MODULES_END,