From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48BD3FA3749 for ; Tue, 1 Nov 2022 11:29:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230313AbiKAL3p (ORCPT ); Tue, 1 Nov 2022 07:29:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35532 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230358AbiKAL3N (ORCPT ); Tue, 1 Nov 2022 07:29:13 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C81660E7; Tue, 1 Nov 2022 04:28:31 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id D4986B81CC6; Tue, 1 Nov 2022 11:28:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D8A4C433C1; Tue, 1 Nov 2022 11:28:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667302108; bh=bJGpsnaeqIW4OyysBJrOqqOPq6OzDc2JHGBYXmqPJEg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Kg289btFN8V8DcuR1CHr7UwGBl39yH39510M6nH9owraouE4KqkosMwk4NbEav/By z169SoSyhHjn8Iv9o5h6bcPr+TQgpvxIr3zrVUxiA1PIT3WfwaDRvxFPbKzeN9+xb1 x8SDV6XNA7302kEFWKMxplAwHVGpCGnKBz+lot1GWYyvQY/Km6UvV+/WfbABT5pqmY n3uT2PqGCLi6kwXcKrIvvPqR3K8enCV934mT0hY2j0lk///8hPca65f6YiPt1L5HCl ghCeQGR+Jwv8d37PWF9m3WbCYHrZkyxtxNMW6Nxc4d+Ro8I6kWNGq9EjRdj5PkxfoH bO6y7I93QL2+w== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ashish Kalra , "Rafael J . Wysocki" , Sasha Levin , rafael@kernel.org, robert.moore@intel.com, xueshuai@linux.alibaba.com, tony.luck@intel.com, dave.hansen@linux.intel.com, linux-acpi@vger.kernel.org, devel@acpica.org Subject: [PATCH AUTOSEL 6.0 21/34] ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init() Date: Tue, 1 Nov 2022 07:27:13 -0400 Message-Id: <20221101112726.799368-21-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221101112726.799368-1-sashal@kernel.org> References: <20221101112726.799368-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ashish Kalra [ Upstream commit 43d2748394c3feb86c0c771466f5847e274fc043 ] Change num_ghes from int to unsigned int, preventing an overflow and causing subsequent vmalloc() to fail. The overflow happens in ghes_estatus_pool_init() when calculating len during execution of the statement below as both multiplication operands here are signed int: len += (num_ghes * GHES_ESOURCE_PREALLOC_MAX_SIZE); The following call trace is observed because of this bug: [ 9.317108] swapper/0: vmalloc error: size 18446744071562596352, exceeds total pages, mode:0xcc0(GFP_KERNEL), nodemask=(null),cpuset=/,mems_allowed=0-1 [ 9.317131] Call Trace: [ 9.317134] [ 9.317137] dump_stack_lvl+0x49/0x5f [ 9.317145] dump_stack+0x10/0x12 [ 9.317146] warn_alloc.cold+0x7b/0xdf [ 9.317150] ? __device_attach+0x16a/0x1b0 [ 9.317155] __vmalloc_node_range+0x702/0x740 [ 9.317160] ? device_add+0x17f/0x920 [ 9.317164] ? dev_set_name+0x53/0x70 [ 9.317166] ? platform_device_add+0xf9/0x240 [ 9.317168] __vmalloc_node+0x49/0x50 [ 9.317170] ? ghes_estatus_pool_init+0x43/0xa0 [ 9.317176] vmalloc+0x21/0x30 [ 9.317177] ghes_estatus_pool_init+0x43/0xa0 [ 9.317179] acpi_hest_init+0x129/0x19c [ 9.317185] acpi_init+0x434/0x4a4 [ 9.317188] ? acpi_sleep_proc_init+0x2a/0x2a [ 9.317190] do_one_initcall+0x48/0x200 [ 9.317195] kernel_init_freeable+0x221/0x284 [ 9.317200] ? rest_init+0xe0/0xe0 [ 9.317204] kernel_init+0x1a/0x130 [ 9.317205] ret_from_fork+0x22/0x30 [ 9.317208] Signed-off-by: Ashish Kalra [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/apei/ghes.c | 2 +- include/acpi/ghes.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 80ad530583c9..9952f3a792ba 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -163,7 +163,7 @@ static void ghes_unmap(void __iomem *vaddr, enum fixed_addresses fixmap_idx) clear_fixmap(fixmap_idx); } -int ghes_estatus_pool_init(int num_ghes) +int ghes_estatus_pool_init(unsigned int num_ghes) { unsigned long addr, len; int rc; diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h index 34fb3431a8f3..292a5c40bd0c 100644 --- a/include/acpi/ghes.h +++ b/include/acpi/ghes.h @@ -71,7 +71,7 @@ int ghes_register_vendor_record_notifier(struct notifier_block *nb); void ghes_unregister_vendor_record_notifier(struct notifier_block *nb); #endif -int ghes_estatus_pool_init(int num_ghes); +int ghes_estatus_pool_init(unsigned int num_ghes); /* From drivers/edac/ghes_edac.c */ -- 2.35.1