From patchwork Mon Apr 29 12:16:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13646809 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ADBC254736; Mon, 29 Apr 2024 12:17:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714393056; cv=none; b=iCJV1KmeEdVRLaY5vfj94Ntx8muUoI90OTapnCUSu8SrG7gLtza16vHI4sWp4TNXYmWOk8hNTcRgFt6j5SJCsv19ZrEVP/IFnq5RbFQw0tx9C8YNL/f4QTy1t39XDVw8IKIFewsFu6mDa/Pyncgg/DwPoyOmsjJ5NrBGiGx5PSE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714393056; c=relaxed/simple; bh=et4MgsnYGm8cVKv9jXBAzJOVzMpXCbC7LVUAQwPu1L8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AcLFZnYL6Q1Pf/qOgcDafM/ih7s0QwoqudlMf98JMfjw40+OlQqL/C6BxnHJyiU0CysmAZtvYxjkjxOwevV+9NAWxX9ENz3NGOKG3TEsNhFzTnJedsNE5a3zHExBC3w89TFntWAuMjQqB9Tv7njtF+PZxce8ji2Z9Ga/V/WzUeQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sKwLHX22; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sKwLHX22" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98887C4AF19; Mon, 29 Apr 2024 12:17:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714393056; bh=et4MgsnYGm8cVKv9jXBAzJOVzMpXCbC7LVUAQwPu1L8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sKwLHX22IdeW62736wZ9r1Ikc2SqCJi9L5yjGR/7xI3GLyv4B4elzDchb1SGl++Wj hXWds1Pah1tt9zbAlLSRB2sxYnf5jMZYuc72yLTyQybTOBcpZ4kHzM8kl0uxUW68wJ bMhxoiVvvVzrkF7bXlTe8iq0Ts/IbyOLtbViwz2+g5SMGZezqxFY1WPTCsn82Q6rCL 40jrR0zhHdgWUMckJl4r/6m3yRk0TwmQEqcecKSZfwHa8lk0f+PQ87hN6JGasuPxOs 1L5Ek4JLmOmVkLuztUzltVHerGBETMLdq9JzO8Y60eATC+Y6+We/ipxX/x3WGFdGlw RmkGLgOWCS7Vg== From: Mike Rapoport To: linux-kernel@vger.kernel.org Cc: Alexandre Ghiti , Andrew Morton , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Catalin Marinas , Christophe Leroy , "David S. Miller" , Dinh Nguyen , Donald Dutile , Eric Chanudet , Heiko Carstens , Helge Deller , Huacai Chen , Kent Overstreet , Luis Chamberlain , Mark Rutland , Masami Hiramatsu , Michael Ellerman , Mike Rapoport , Nadav Amit , Palmer Dabbelt , Peter Zijlstra , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Rick Edgecombe , Russell King , Sam Ravnborg , Song Liu , Steven Rostedt , Thomas Bogendoerfer , Thomas Gleixner , Will Deacon , bpf@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v7 05/16] module: make module_memory_{alloc,free} more self-contained Date: Mon, 29 Apr 2024 15:16:09 +0300 Message-ID: <20240429121620.1186447-6-rppt@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240429121620.1186447-1-rppt@kernel.org> References: <20240429121620.1186447-1-rppt@kernel.org> Precedence: bulk X-Mailing-List: linux-modules@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: "Mike Rapoport (IBM)" Move the logic related to the memory allocation and freeing into module_memory_alloc() and module_memory_free(). Signed-off-by: Mike Rapoport (IBM) Reviewed-by: Philippe Mathieu-Daudé --- kernel/module/main.c | 64 +++++++++++++++++++++++++++----------------- 1 file changed, 39 insertions(+), 25 deletions(-) diff --git a/kernel/module/main.c b/kernel/module/main.c index e1e8a7a9d6c1..5b82b069e0d3 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -1203,15 +1203,44 @@ static bool mod_mem_use_vmalloc(enum mod_mem_type type) mod_mem_type_is_core_data(type); } -static void *module_memory_alloc(unsigned int size, enum mod_mem_type type) +static int module_memory_alloc(struct module *mod, enum mod_mem_type type) { + unsigned int size = PAGE_ALIGN(mod->mem[type].size); + void *ptr; + + mod->mem[type].size = size; + if (mod_mem_use_vmalloc(type)) - return vzalloc(size); - return module_alloc(size); + ptr = vmalloc(size); + else + ptr = module_alloc(size); + + if (!ptr) + return -ENOMEM; + + /* + * The pointer to these blocks of memory are stored on the module + * structure and we keep that around so long as the module is + * around. We only free that memory when we unload the module. + * Just mark them as not being a leak then. The .init* ELF + * sections *do* get freed after boot so we *could* treat them + * slightly differently with kmemleak_ignore() and only grey + * them out as they work as typical memory allocations which + * *do* eventually get freed, but let's just keep things simple + * and avoid *any* false positives. + */ + kmemleak_not_leak(ptr); + + memset(ptr, 0, size); + mod->mem[type].base = ptr; + + return 0; } -static void module_memory_free(void *ptr, enum mod_mem_type type) +static void module_memory_free(struct module *mod, enum mod_mem_type type) { + void *ptr = mod->mem[type].base; + if (mod_mem_use_vmalloc(type)) vfree(ptr); else @@ -1229,12 +1258,12 @@ static void free_mod_mem(struct module *mod) /* Free lock-classes; relies on the preceding sync_rcu(). */ lockdep_free_key_range(mod_mem->base, mod_mem->size); if (mod_mem->size) - module_memory_free(mod_mem->base, type); + module_memory_free(mod, type); } /* MOD_DATA hosts mod, so free it at last */ lockdep_free_key_range(mod->mem[MOD_DATA].base, mod->mem[MOD_DATA].size); - module_memory_free(mod->mem[MOD_DATA].base, MOD_DATA); + module_memory_free(mod, MOD_DATA); } /* Free a module, remove from lists, etc. */ @@ -2225,7 +2254,6 @@ static int find_module_sections(struct module *mod, struct load_info *info) static int move_module(struct module *mod, struct load_info *info) { int i; - void *ptr; enum mod_mem_type t = 0; int ret = -ENOMEM; @@ -2234,26 +2262,12 @@ static int move_module(struct module *mod, struct load_info *info) mod->mem[type].base = NULL; continue; } - mod->mem[type].size = PAGE_ALIGN(mod->mem[type].size); - ptr = module_memory_alloc(mod->mem[type].size, type); - /* - * The pointer to these blocks of memory are stored on the module - * structure and we keep that around so long as the module is - * around. We only free that memory when we unload the module. - * Just mark them as not being a leak then. The .init* ELF - * sections *do* get freed after boot so we *could* treat them - * slightly differently with kmemleak_ignore() and only grey - * them out as they work as typical memory allocations which - * *do* eventually get freed, but let's just keep things simple - * and avoid *any* false positives. - */ - kmemleak_not_leak(ptr); - if (!ptr) { + + ret = module_memory_alloc(mod, type); + if (ret) { t = type; goto out_enomem; } - memset(ptr, 0, mod->mem[type].size); - mod->mem[type].base = ptr; } /* Transfer each section which specifies SHF_ALLOC */ @@ -2296,7 +2310,7 @@ static int move_module(struct module *mod, struct load_info *info) return 0; out_enomem: for (t--; t >= 0; t--) - module_memory_free(mod->mem[t].base, t); + module_memory_free(mod, t); return ret; }